United States. Naval observatory. Astronomical and meteorological observations made during 1847 [-1880]; v. 3, 5, 6, 9, 11-18, 23-27. Wash. 1853-84. 19 v. Q.

in 525: D Contents. V. 3, 1847. Introd.-[Observ. and results]. -App. Sestini, Benedict. Observ. on solar spots made at the observatory of Georgetown college, sept. 20-nov. 6, 1850; Marr, Robert A. Observ. on the Mississippi river at Memphis, Tenn., march 1, 1850-march 1, 1851; Tables for facilitating the reduction of the apparent right ascensions and declinations of the fixed stars to their mean places, with a general table for annual precessions. 5, 1849-50. Introd.[Observ. and results). 6, 1851-52. Introd. [Observ. and results]. 9, 1862. Introd. [Astron. observ. and results].-Meteorol. observ.-App.: Longitude of Wash. as derived from moon culminations observed at the Royal obs., Greenwich, and the U. S. naval obs., Wash., during 1846-1860 incl. 11, 1864. Introd. [Astron. observ. and results]. - Meteorol. observ. -Catalogue of the library,-App.: Newcomb, Simon. Investigation of the latitude and longitude of the U. S. naval obs., Wash., and of certain circumpolar stars. 12, 1865. Introd. - [Astron. observ. and results]. Meteorol. observ. - App. 1: Description of the transit circle of the U. S. naval obs.; 2: Investigation of the distance of the sun and of the elements which depend upon it. 13, 1866. Introd. — - Observ. and results. - App.: Meteorol. observ. at the U. S. naval obs. from june 30, 1842 to jan. 1, 1867. 14, 1867. Introd.-Observ. and results. App. 1: Harkness, W: Report on the difference of longitude between Washington and Havana; 2: Reports on observations of the total eclipse of the sun, aug. 7, 1869, ill; 3: Newcomb, Simon. Positions of fundamental stars deduced from observations made at the U. S. naval obs. between 1862 and 1867; 4: Hall, Asaph. Catalogue of 151 stars in Præsepe. 15, 1868. Introd. Observ. and results. App.: A catalogue of 1963 stars and of 290 double stars observed by U.S. naval astron. exp. to the southern hemisphere during 1850-1852. 16, 1869. [Report missing]. App. 1: Report on observations of the total solar eclipse of dec. 22, 1870, conducted under the direction of B. F. Sands; 2: Zones of stars observed at the U. S. naval obs. with the mural circle in 1846-1849 by J. H. C. Coffin, T. J. Page and C: Steedman. 17, 1870. Introd.-Observ. and results. App. 1: Harkness, W: Report on the difference of longitude between Wash. and St. Louis; 2: Hall, Asaph, and W: Harkness. Reports on observations of Encke's comet during its return in 1871, ill. 3: Newcomb, Simon. On the right ascensions of the equatorial fundamental stars and the corrections necessary to reduce the right ascensions of different catalogues to a mean homogeneous system; 4: Zones of stars observed at the naval obs. with the meridian transit instrument in 1846-1849. 18, 1871. Introd.-Observ. and results.-App. 1: Zones of stars observed at the naval obs. with the meridian circle in 1847-1849; 2: Results of observations made at the U. S. naval obs. with the transit instrument and mural circle in 1853-1860 incl.; 3: Yarnall, M. Catalogue of stars observed at the U. S. naval obs. during 18451871; 4: Nourse, J. E. Memoir of the founding and progress of the U. S. naval observatory. 23, 1876, pt. 1. Introd. Observ. and results. Meteorol. observ.-Pt. 2, app. 1: Holden, E: S. A subject-index to the publications of the U. S. naval obs. 1845-1875; 2: Reports on telescopic observations of the transit of Mercury, may 5-6, 1878; 3: Reports on the total solar eclipses of july 29, 1878 and jan. 11, 1880, ill. 24, 1877. Introd.-Observ. and results.-App. 1: Holden, E: S. Investigation of the objective and micrometers of the 26 inch equatorial, constructed by Alvan Clark and sons; 2: Holden, E: S. The multiple star Sigma 748; 3: Eastman, J. R. The solar parallax from meridian observations of Mars in 1877; 4: Report on the determination of the longitude of the Cincinnati obs., at Mount Lookout, Hamilton county, Ohio; 5: Longitude of the Morrison obs., Glasgow, Mo.; 6: Hall, Asaph. Observ. of double stars made at the U. S. naval obs. 25, 1878. Introd. - Observ. and results.-Meteorol. obs. and results.-App. 1: Holden, E: S. Monograph of the central parts of the nebula of Orion, ill.; 2: Paul, H. M., and C. A. Young. Longitude of the J: C. Green school of science, Princeton, N. J. 26, 1879. Introd. - Observ. and results. Meteorol. observ. and results.-App. 1: Hall, Asaph. The parallax of Alpha Lyre and 61 Cygni; 2: Paul, H. M. A determination of the semi-diameter of the moon from two occultations of the Pleiades, obs. july

App.:

and results. - Meteorol. observ. and results. Winlock, W: C. Observations of the great comet of 1882, made at the U. S. naval obs., ill. Frémont, J: C: Astron. and meteorol. observations [made during the 1st and 2d exploring exped. in 1842-44]. In his Report. in 917.5: D Gilliss, James Melville. Astronomical observations made at the naval observatory [on Capitol Hill], Washington, under orders of the sec. of the navy, dated aug. 13, 1838, [1838-1842]. Wash, 1846. O. in 525: D Contains also Catalogue of 1248 stars observed at Washington between oct. 1838 and july 1842, reduced to the middle epoch jan. 1, 1840, and compared in right ascension with mean places of the British association catalogue.

- Observations to determine the solar parallax. (U. S. astron. exped. rep., v. 3). Wash. 1856. Q. in 508 : D Contents. Origin and operations of the exped. Observ. of Mars and Venus, 1849-52.-Gould, B: A., jr. The solar parallax, deduced from observ. of the exped. Santiago observ. of Mars and Venus. Ferguson, J. Washington observ. of Mars and Venus.-Bond, W. Cranch. Cambridge, Mass., observ. of opposition of Mars 1849-50.-Maclear, T: Cape of Good Hope observ. of opp. of Mars.

Jones, G: Observations on the zodiacal light from april 2, 1853, to april 22, 1855, made chiefly on board the U. S. steam-frigate Mississippi, during her course in the eastern seas and her voyage homeward; with conclusions from the data thus obtained. In U. S. Japan exped., Perry, v. 3.

in 915.2: D

Schott, C: Anthony. Astronomical observations in the Arctic seas by Elisha Kent Kane, made during the second Grinnell expedition in search of sir John Franklin, in 1853-5, at Van Rensselaer harbor and other points in the vicinity of the northwest coast of Greenland; reduced and discussed. Map and ill. Wash. 1860. Q. In Smithsonian contributions. 506: R3 v12 - Physical observations in the Arctic seas by Isaac I. Hayes, made on the west coast of north Greenland, the vicinity of Smith strait and the west side of Kennedy channel, during 1860-61; reduced and discussed. Ill. Wash. 1867. Q. In Smithsonian contributions. 506 R3 v15

Contents. Introd.-Pt. 1, Astronomical obs.-Pt. 2, Magnetic obs.-Pt. 3, Tidal obs.-Pt. 4, Meteorol. obs. -Appendix.

United States. Pacific r. r. surveys. Astron

omical, magnetic and meteorological observations of the explorations for a route near the 35th parallel of north latitude. In Report of the survey, v. 4. in 625: D Cutts, R: D., and C: A. Young. Report of the astronomical and meteorological observations made at Sherman, Wyoming terr. In U. S. coast survey rep. 1872. in 622 : D

Gilliss, James Melville. An account of the total eclipse of the sun, sept. 7. 1858, as observed near Olmos, Peru. Ill. Wash. 1859. Q. In Smithsonian contributions. 506: R3 v11 Alexander, Stephen. Report on the expedition to Labrador to observe the total eclipse of the sun on july 18, 1860, organized under act of congress, approved june 15, 1860. In

Chappe d'Auteroche], and at Philadelphia [by Rittenhouse]. In U. S. coast survey rep. 1874. in 622 : D Newcomb, Simon, ed. Observations of the transit of Venus, dec. 8-9, 1874, made and reduced under the dir. of the commission created by congress. Ill. (U. S. 46th congress, 1 sess. Senate ex. doc. no. 31.) Wash. 1880. Q. in 525 :D Davidson, G: Report of the transit of Venus expedition to Japan, 1874. In U. S. coast survey rep. 1875. in 622 : D Smith, Edwin. Report on the transit of Venus expedition to Chatham island, 1874. In U. S. coast survey rep. 1875. in 622 : D United States. Congress. Instructions for observing the transit of Venus, dec. 6, 1882, prepared by the commission authorized by congress, and printed for the use of the observing parties by authority of the sec. of the navy. Maps. Wash. 1882. F.

1. In general.

Lommel, Eugen Cornelius Joseph. Lexikon der physik und meteorologie in volksthümlicher darstellung. Ill. Leipz. 1882. D. 530: R23 Charleton, Walter. Physiologia Epicuro-Gassendo-Charltoniana, or A fabrick of science natural upon the hypothesis of atoms, founded by Epicurus, repaired by Petrus Gassendus, augmented by Walter Charleton. 1st pt. Lond. 1654. Q. 23: R Rutherford, T: A system of natural philosophy; a course of lectures in mechanics, optics, hydrostatics and astronomy, which are read in St. John's college, Cambridge. Cambridge. 1748. 2 v. Q. 530: R9 Enfield, W: Institutes of natural philosophy, theoretical and practical, with some corrections, change in the order of the branches and the addition of an app. to the astronomical part, selected from mr. Ewing's Practical astronomy by S: Webber. 4th amer. ed., with improvements. Bost. 1824. Q. 530: R8 Euler, Leonhard. Letters on different subjects in natural philosophy addressed to a german princess; with notes and a life of Euler by D: Brewster, [and] containing a glossary of scientific terms, with add. notes by J: Griscom. N. Y. 1846. 2 v. S. 530:5 Bird, Golding. Elements of natural philosophy; an experimental introd. to the study of the physical sciences. From the 3d Lond. ed. Ill. Phila. 1848. D. 530:3

Hunt, Robert. Elementary physics; an introd. to the study of natural philosophy. Lond. 1855. D. [T. p. w.]

530:6

Paris, J: Ayrton. Philosophy in sport made science in earnest; an attempt to implant in the young mind the first principles of natural philosophy by the aid of the popular toys and sports of youth. [Anon.] N. Y. 1855. S. 530: 7 Tomlinson, C: Introd. to the study of natural philosophy, for the use of beginners. 9th ed. [Weale's ser.] Lond. 1874. D.

530:14

Arnott, Neil. Elements of physics, or natural philosophy. 7th ed., ed. by Alexander Bain and Alfred Swaine Taylor. N. Y. 1877. D. 530:2 Stewart, Balfour. Physics. (Science primers.) Ill. N. Y. 1879. S. 530:13 Privat-Deschanel, A: Elementary treatise on natural philosophy. Tr. and ed., with add., by J. D. Everett. Ill. N. Y. 1878. O.

530:18 Ganot, Adolphe. Natural philosophy for general readers and young persons. Tr. and ed. from Ganot's Cours élémentaire de physique, with the author's sanction, by E. Atkinson. 2d ed. N. Y. 1876. D. 530 : 4 Elementary treatise on physics, experimental and applied, for the use of colleges, and schools. Tr. and ed. from Ganot's Eléments de physique, with the author's sanction, by E. Atkinson. 11th ed., rev. and enl. Ill. N. Y. 1883. O. 530: 20 Pickering, E: C. Elements of physical manipulation. 2d ed. N. Y. 1875, 1876. 2 v. O. 530+17 Youmans, E: Livingstone, ed. The correlation and conservation of forces; a series of expositions, with an introd. and brief bio

graphical notices of the chief promoters of the new views. N. Y. 1876. D. 530:15 Contents. Grove, W: R. The correlation of physical forces.-Helmholtz, H. L: F. The interaction of natural forces.-Mayer, J. R. The forces of inorganic nature; Celestial dynamics; The mechanical equivalent of heat.-Liebig, J. v. The connection and equivalence of forces.-Carpenter, W: B: The correlation of the physical and vital forces. Grove, W: Robert. The correlation of physical forces. 3d ed. Lond. 1855. O. 530:24 Saigey, Émile. The unity of natural phenomena;

an

a popular introd. to the study of the forces of nature. From the french; with introd. and notes by T: Freeman Moses. [Science for the people.] Bost. 1873. D. 530:11 Krebs, G: Die erhaltung der energie als grundlage der neuern physik. München. 1877. S.

530:10 Stewart, Balfour. The conservation of energy; with an app. treating of the vital and mental applications of the doctrine. (Intern. scientific ser.) N. Y. 1877. D. 530:12 Carpenter, W: Lant. Energy in nature; being,

with some additions, the substance of a course of six lectures upon the forces of nature and their natural relations, del. under the auspices of the Gilchrist educational trust, in the autumn of 1881. Ill. N. Y. 1883. D. 530:21 Naville, Jules Ernest. Modern physics; studies historical and philosophical. From the french by H: Downton. N. Y. 1884. D.

*

530:22

Abbott, Jacob. Science for the young: Force. Ill. N. Y. 1873. D. x 530 : 19 Hooker, Worthington. The child's book of nature, for the use of families and schools, intended to aid mothers and teachers in training children in the observation of nature; in 3 pts. Pt. 3: Air, water, heat, light, etc. N. Y. 1881. S. x 530:16

2. Mechanics.

Clifford, W: Kingdon. Elements of dynamic; an introd. to the study of motion and rest in solid and fluid bodies; pt. 1: Kinematic. Lond. 1878. D. 531:18

Minchin, G: M. Uniplanar kinematics of solids and fluids, with applications to the distribution and flow of electricity. Oxford. 1882. D. 531:22 Tait, P: Guthrie, and W: J: Steele. A treatise on dynamics of a particle, with numerous examples. 5th ed., rev. Lond. 1882. D. 531:20

Routh, E: J: The elementary part of a system of rigid bodies; pt. 1 of a treatise on the whole subject, with numerous examples. 4th ed., rev. and enl. Lond. 1882. O. 531:19 Maxwell, James Clerk. Matter and motion.

Ivan Nostrand's science ser.] N. Y. 1878.

531:10 Craig, T: Elements of the mathematical theory of fluid motion: On the motion of a solid in a fluid, and the vibrations of liquid spheroids. an Nostrand's science ser.] 531:7

N. Y. 1879. Van

Craig, T:-Continued.

- Wave and vortex motion. [Van Nostrand's science ser.] N. Y. 1879. T. 531:8 Minchin, G: M. A treatise on statics, with applications to physics; v. 1: Equilibrium of coplanar forces. 3d ed., corr. and enl.

Oxford. 1884. O.

531:21 Laplace, P: Simon marquis de. A treatise upon analytical mechanics; being the first book

dated with explanatory notes by J: Toplis. Nottingham. 1814. O. 531:3 Bartlett, W: H. C. Elements of analytical mechanics. 3d ed., rev. and corr. N. Y. 1855. O. 531+14 Farrar, J: An elementary treatise on mechanics; comprehending the doctrine of equilibrium and motion as applied to solids and fluids, chiefly compiled and designed for the use of students of the university of Cambridge, New Eng. 2d ed., rev. and corr. Bost. 1834. O. 531+16 Morin, Arthur Jules. Fundamental ideas of mechanics and experimental data. Rev., tr. and reduced to english units of measure by Joseph Bennett. N. Y. 1860. O. 531-+15

Kater, H:, and Dionysius Lardner. A treatise on mechanics. (Amer. lib. of useful knowledge, v. 2). Bost. 1831. D. 531:2 Same. (Bost. soc. for the diffusion of useful 531:2 knowledge). Bost. 1831. D.

Peirce, C: Sanders. On the flexure of pendulum supports. On the deduction of the ellipticity of the earth from pendulum experiments. On a method of observing the coincidence of vibrations of two pendulums. On the value of gravity at Paris. In U. S. coast survey rep. 1881. in 622 : D

in 622: D

· Measurements of gravity at initial stations in America and Europe. Pt. 1: [Methods employed and main results]. In the same, 1876. in 622 : D Determinations of gravity at Allegheny, Edensburgh and York, Pa., in 1879 and 1880. In the same, 1883. Trowbridge, W. P. Investigation of the laws of motion governing the descent of the weight and line in deep-sea soundings. In U. S. coast survey rep. 1858. in 622 : D Renwick, James. Applications of the science of mechanics to practical purposes. N. Y. 1840. S. 513:6 Moseley, H: Illustrations of mechanics. Rev. by James Renwick. Ill. N. Y. 1844. S.

531:4

The mechanical principles of engineering and architecture. 2d amer. from 2d Lond. ed., with add. by D. H. Mahan. N. Y. 1866. D. 531: R17 Byrne, Oliver. The essential elements of practical mechanics, based on the principle of work; designed for engineering students. 2d ed. Lond. 1872. D. 531:1. Nystrom, J: W: A new treatise on the elements of mechanics, establishing strict precision in the meaning of dynamical terms; accompanied with an app. on duodenal arithmetic and metrology. N. Y. 1877. O.

532:1

Pfaff, F: Das wasser. (Deutsche originalausg.) 2te aufl. München. 1878. S. Tomlinson, C: Pneumatics, for the use of beginners. 3d ed. enl. [Weale's ser.] Lond. 1866. D. 533:3 Hartley, Walter Noel. Air and its relations to life; being, with some add., the substance of a course of lectures del. in the summer of 1874, at the Royal institution of Great Britain. N. Y. 1875. D. 533:1

Plympton, G: W., comp. The aneroid barometer, its construction and use; compiled from several sources. [Van Nostrand's science ser.] N. Y. 1878. T. 533:2 Note. For works on the barometer, see Meteorology, el. 552, and also hypsometry in Topographica engineering, cl. 622. Zahner, Robert. The transmission of power by compressed air. [Van Nostrand's science ser.] N. Y. 1878. T. 533:4 Marion, Fulgence. Wonderful balloon ascents,

or The conquest of the skies; a history of balloons and balloon voyages. From the french. [Ill. lib. of wonders.] N. Y. 1874. 533:5

4. Acoustics.

Radau, Rodolphe. Die lehre vom schall; gemeinfassliche darstellung der akustik. 2te aufl. München. 1875. S. 534:1 Wonders of acoustics, or The phenomena of sound. From the french, the english rev. by Robert Ball. [Ill. lib. of wonders.] N. Y. 1872. D. 534:4 Tyndall, J: Sound. 3d ed. rev. and enl. N. Y. 1877. D. Mayer, Alfred Marshall. Sound; a series of experiments in the phenomena of sound. (Experimental science ser. for beginners.) N. Y. 1878. D. 534:3

534:2

Smith, T. Roger. Acoustics in relation to architecture and building; the laws of sound as applied to the arrangement of buildings. New ed. ill., with index. [Weale's ser.] Lond. [1861]. D. 534:5

5. Optics.

Farrar, J: An experimental treatise on optics; comprehending the leading principles of the science and an explanation of the more important and curious optical instruments and optical phenomena; the 3d part of a course of natural philosophy, compiled for

the use of the students of the university at Cambridge, New Eng. Cambridge. 1826. 0. 535+13 Abbott, Jacob. Science for the young: Light. N. Y. [1871]. D. x 535:12 Lommel, Eugen. The nature of light, with a general account of physical optics. Ill. Intern. scientific ser.) N. Y. 1876. D.

535:3 Marion, Fulgence. The wonders of optics. Tr. from the french and ed. by C: W. Quin. [Ill. lib. of wonders]. N. Y. 1875. D. 535:11 Mayer, Alfred Marshall, and C: Barnard. Light; a series of simple, entertaining and inexpensive experiments in the phenomena of light for the use of students of every age. (Experimental science ser. for beginners.) N. Y. 1877. D. 535:4 Pisko, F: Joseph. Licht und farbe ; eine gemeinfassliche darstellung der optik. 2te aufl. München. 1876. S. 535:1

Tait, P: Guthrie. Light. Edinb. 1884. D.

535: 15

535: 10

Tyndall, J: Light and electricity; notes of two courses of lectures before the Royal institution of Great Britain. N. Y. 1871. D. 535:6 Lectures on light, del. in the U. S. in 1872-73 ; with an app. N. Y. 1873. D. 535:5 Lockyer, Joseph Norman. The spectroscope and its applications. (Nature ser.) Ill. Lond. 1873. D. 535:9 Nolan, T: The telescope; the principles involved in the construction of refracting and reflecting telescopes. [Van Nostrand's science ser.] N. Y. 1881. T. Le Conte, Joseph. Sight; an exposition of the principles of monocular and binocular vi sion. Ill. (Intern. scientific ser.) N. Y. 1881. D. 535:2 Bezold, W: v. The theory of color in its relation to art and art industry. Tr. from the german by S. R. Köhler; with an introd. and notes by E: C. Pickering. Authorized amer. ed., rev. and enl. by the author. Ill. Bost. 1876. O. 535:7 Rood, Ogden N. Modern chromatics, with applications to art and industry. Ill. (Intern. scientific ser.) N. Y. 1879. D. 535:8

6. Heat.

Abbott, Jacob. Science for the young: Heat. N. Y. [1871]. D. x 536:8 Faraday, Michael. A course of six lectures on the chemical history of a candle; added, a lecture on platinum, del. before a juvenile auditory at the Royal institution of Great Britain, during the christmas holidays of 1860-1. Ed. by W: Crookes. Ill. N. Y. 1861. S. x 536:9 Cazin, Achille. Die wärme. Nach dem französischen deutsch bearbeitet; herausg. durch Philipp Carl. 2te aufl. München. 1877. D. 536:1

The phenomena and laws of heat. Tr. and ed. by Elihu Rich. [Ill. library of wonders]. N. Y. 1874. D. 536:2

x denotes books specially adapted for children,

Maxwell, James Clerk. Theory of heat. New ed. N. Y. 1875. S. 536:5 Tyndall, J: On radiation; the Rede lecture, del. in the senate-house, before the univ. of Cambridge, Eng., may 16, 1865. N. Y. 1868. D. 536:4 Heat as a mode of motion. From the 4th eng. ed. N. Y. 1877. D. 536:3 Siemens, Sir C: W:

On the conservation of solar energy; a collection of papers and discussions. Ill. Lond. 1883. O. 536:10 Williams, C: Wye. On heat in its relations to water and steam; embracing new views of vaporization, condensation and explosions. From the 2d Lond. ed. Phila. 1867. O.

536+6 Ledoux, C: Ice-making machines; the theory of the action of the various forms of coldproducing, or so-called ice machines, machines à froid. Tr. from the french. N. Y. 1879. T. 536:7 Gamgee, J: On artificial refrigeration. Ill. In U. S. fish com. report, v. 5. in 639 : D

7. Electricity and magnetism. Thompson, Silvanus P. Elementary lessons in electricity and magnetism. Lond. 1884. S. 537:21 Gordon, J. E. H. A physical treatise on electricity and magnetism. N. Y. 1880. 2 v. O. 537+9 Maxwell, James Clerk. Treatise on electricity and magnetism. 2d ed. Oxford. 1881. 2 v. O. 537:10 Carl, Philipp. Die elektrischen naturkräfte; der magnetismus, die elektricität und der galvanische strom, mit ihren hauptsächlichsten anwendungen, gemeinfasslich dargestellt. 2te aufl. München. 1878. S. 537:1 Baille, J: Baptiste. Wonders of electricity. Tr. from the french, ed. with numerous add. by J: W. Armstrong. [Ill. lib. of wonders.] N. Y. 1872. D. 537:2 Harris, Sir W: Snow. Rudimentary treatise on galvanism and the general principles of animal and voltaic electricity. New ed. rev., with considerable add., by Robert Sabine. Ill. [Weale's ser.] Lond. 1869. D. 537:5 Rudimentary electricity; showing the general principles of electrical science and the purposes to which it has been applied. 7th ed. with add., incl. extracts from the Cavendish papers, and a general index. [Weale's ser.] Lond. 1875. D. 537:6 Tyndall, J: Lessons in electricity at the Royal

institution, 1875-6. N. Y. 1877. D. 537:7 Fonvielle, Wilfrid de. Thunder and lightning.

Tr. from the french and ed. by T. L. Phipson. [Ill. lib. of wonders.] N. Y. 1875. D. 537:4 Secchi, Angelo. Researches on electrical rheometry. Ill. Wash. 1852. Q. In Smithsonian contributions. 506 R3 v3 Hough, G. W. Velocity of the electric current over telegraph wire; read before the Albany institute june 1869. Albany, N. Y. 1869. Ö. 537: Pam Induction coils; how made and how used. Reprinted from the 8th eng. ed. [Van Nostrand's science ser.] N. Y. 1881. T.

Du Moncel, Theodore Achille L: comte. The telephone, the microphone and the phonograph. Authorized tr., with add. and corr. by the author. Ill. N. Y. 1879. D. 537:3 Electro-magnets; the determination of the elements of their construction, tr. from the 2d ed. Reprinted from Van Nostrand's magazine. [Van Nostrand's science ser.] N. Y. 1883. T. 537:12 and W: H: Preece.

Incandescent electric lights, with particular reference to the Edison lamps at the Paris exhibition. Rep. with add. and new ill. from Van Nostrand's magazine. [Van Nostrand's science ser.] N. Y. 1882. T. 537:11

Contains also "The economy of the electric light by incandescence," by J: W. Howell, and "Steadiness of the electric current," both rep. from Van Nostrand's magazine. Prescott, G: B. The speaking telephone, electric light, and other recent electric inventions. III. N. Y. 1879. O. 537+13 Greer, H, ed. Recent wonders in electricity, electric lighting, magnetism, telegraphy, etc.; articles by dr. Siemens, count Du Moncel and prof. Thomson. N. Y. [1883]. O. 537+16 Fiske, Bradley A. Electricity in theory and practice, or The elements of electrical engineering. Ill. N. Y. 1883. O. 537:17 Hospitalier, E. The modern applications of electricity. Tr. and enl. by Julius Maier. 2d ed. rev., with add. Ill. N. Y. 1883. 2 v. 0. 537:14

Contents. V. 1. Electric generators.-Electric light. 2. Telephone. Various applications. Electrical transmission of energy. Thompson, Silvanus P. Dynamo-electric_machinery; lectures, reprinted from the Journal of the society of arts, with an introd. by Frank L. Pope. [Van Nostrand's science ser] N. Y. 1883. T. 537: 15 Recent progress in dynamo-electric machines; a supplement to "Dynamo-electric machinery." Reprinted from the Journal of the society of arts. Ill. [Van Nostrand's science ser.] N. Y. 1884. T. 537:20 Dynamic electricity; its modern use and measurement, chiefly in its application to electric lighting and telegraphy, incl., 1, Some points in electric lighting, by J: Hopkinson; 2, On the measurement of electricity for commercial purposes, by James N. Shoolbred; 3, Electric light arithmetic, by R. E. Day. Ill. [Van Nostrand's science ser.] N. Y. 1884. T. 537:19

Gore, G: The art of electro-metallurgy, incl. all known processes of electro deposition. 2d ed. N. Y. 1884. S. 537:18

Magnetism.

Harris, Sir W: Snow. Rudimentary magnetism, a concise exposition of the general principles of magnetical science and the purposes to which it has been applied. 3d ed., rev. and enl. by H: M. Noad. Ill. [Weale's ser.] Lond. 1875. D. 538:1 United States. Navy dep't. Magnetism; its general principles and special application to ships and compasses. Ill. (Naval prof.