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Página 272 - Guide to the Study of Insects, and a Treatise on those Injurious and Beneficial to Crops.
Página 14 - Very frequently the first letter of the name of the element is used as the symbol. If the names of two or more elements begin with the same letter, this letter is used, but some other letter of the name is added.
Página 63 - We have thus learned that (1) water can be decomposed into hydrogen and oxygen by means of an electric current; (2) the gases are obtained in the proportion of eight parts by weight of oxygen to one part by weight of hydrogen, or one volume of oxygen to two volumes of hydrogen; (3) when hydrogen is burned water is formed...
Página 272 - I2mo. $1.00 net. The Life of a Butterfly. A Chapter in Natural History for the General Reader. By SH SCUDDER.
Página 271 - ... *Merriam's Mammals of the Adirondack Region, Northeastern New York. With an Introductory Chapter treating of the Location and Boundaries of the Region, its Geological History, Topography, Climate, General Features, Botany, and Faunal Position. By Dr. C. HART MERRIAM. 316 pp.
Página 272 - Enlarged. $1.25 net. Williams's Geological Biology. An Introduction to the Geological History of Organisms. By HENRY S. WILLIAMS, Professor of Geology in Yale College. 8vo. 395 pp. $2.80 net. Woodhull's First Course in Science. By JOHN F. WOODHULL, Professor in the Teachers
Página 270 - Astronomy. By JOHN D. CHAMPLIN, Jr., Editor of Champlin's Young Folks
Página iii - ... make his own inferences. The author has written under the belief that "a rational course in chemistry, whether for younger or older pupils, is something more than a lot of statements of facts of more or less importance ; a lot of experiments of more or less beauty; or a lot of rules devised for the purpose of enabling the pupil to tell what things are made of. If the course does not to some extent help the pupil to think as well as to see it does not deserve to be called rational.