Comentarios de la gente - Escribir un comentario
Crítica de los usuarios - Marcar como inadecuado
Excellent tome for all things physical and astronomical and puzzicle. A highly recommended read, but set sure intent as the words are many, the subjects deep, and the thoughts so grand.
Otras ediciones - Ver todas
according acid action already angles apparatus arrangement attached attraction austral axis ball battery become bismuth body boreal called carried centre charged coating combination common conducting conductor connected consequently consists containing continue contrary copper cylinder decomposed decomposition developed direction distance earth effects electricity electrified electro-motive electrode equal experiments explained expressed extremity fluid follows force given glass greater heat immersed imparted inches increased indicated induction intensity iron length less light liquid machine magnetic magnetic pole manner means mercury metallic motion move natural necessary needle negative observed opposite pass phenomena pile placed plane plate pole positive presented pressure principle produced quantity raised received rendered repelled represented in fig revolve round side similar solid solution substances surface suspended temperature transmitted tube vapour vertical vessel voltaic wire zinc
Página i - Museum of Science and Art. THE MUSEUM OF SCIENCE AND ART. Edited by DIONYSIUS LARDNER, DCL, formerly Professor of Natural Philosophy and Astronomy in University College, London. With upwards of 1 200 Engravings on Wood.
Página 24 - ... contraction. Thus, if a pillar of metal one hundred inches in height, being raised in temperature, is augmented in height by a quarter of an inch, the force with which such increase of height is produced is equal to a weight which being placed upon the top of the pillar would compress it so as to diminish its height by a quarter of an inch. In the same manner, if a rod of metal one hundred inches in length be contracted by diminished temperature so as to render its length a quarter of an inch...
Página 4 - THE immense progress made in investigating Roman history and antiquities within the last thirty or forty years, having materially altered the whole complexion of that study, has rendered indispensable a new manual, for the use of schools, removing the old errors and misconceptions which have long since been exposed and exploded by scholars. This compendium is designed to supply the want, by condensing and selecting out of a voluminous mass of detail, that which is necessary to give rather a vivid...
Página 1 - Reiner's Lessons on Form ; or, An Introduction to Geometry, as given in a Pestalozzian School, Cheam, Surrey, 12mo., with numerous Diagrams. 3s. 6d. cloth.
Página 1 - PRINCIPLES OF GEOMETRY, familiarly Illustrated, and applied to a variety of useful purposes. Designed for the Instruction of Young Persons.
Página 309 - The astronomical universe consists of masses, undoubtedly of great magnitude, but separated by such immense distances that they appear to us as material points ; these points attract each other in the inverse ratio of the squares of their distances, and this attraction is the only force which affects their motion. But if our senses were keen enough to show us all the details of the bodies which the physicist studies, the spectacle thus disclosed would hardly differ from the one which the astronomer...
Página 195 - Powdered glass. Flowers of sulphur. Dry metallic oxides. Oils, the heaviest the best. Ashes of vegetable bodies. Ashes of animal bodies. Many transparent crystals, dry. Ice below 13° Fahrenheit. Phosphorus. Lime. Dry chalk.
Página 220 - The thread is fixed at the top to a small windlass t, by which the needle can be raised or lowered, and the whole is included in a glass cage, to preserve the apparatus from the disturbance of the air. Upon this glass cage, which is cylindrical, is a graduated circle dd!, which measures the angle through which the needle is deflected.