LONG MA. VS, GREEiV, d- CO.'S PUBLICATIONS. 



ELEMENTARY PHYSICS. 



By Mark R. Wright, author of "Sound, Light, and Heat." With 238 

 Illustrations. i2mo. 256 pages. 80 cents. 



This work will serve as a suitable text-book for any class beginning the 

 study of physics. The leading facts are brought under the notice of the stu- 

 dent by easy experiments that do not demand expensive apparatus. Full in- 

 structions are given for the construction of the apparatus, in the text, or in the 

 appendix. The author believes that in early lessons it is inadvisable to trouble 

 the student either with theories or with the generalizations that prove such a 

 valuable aid to the advanced student. 



BOWDOIN COLLEGE. 



" I consider it very well adapted to beginners in the science. The long list 

 of experiments affords ample material from which a course of any length may 

 be adapted. The whole trend of the book is in the right direction — the teaching 

 of physics by experiment." — C. C. HuTCHlNS, Brunswick, Me. 



" It should take high rank, and come into wide use among our schools." — 

 Education, Boston. 



"This book possesses considerable merit. The matter contained in it is 

 just about as much as would cover the course usually taken in a year's school 

 work ; the explanatory text is couched in the clearest language, and the ex- 

 periments described are capable of being easily brought to a successful termi- 

 nation. . . . The book compares most favorably with any written for the 

 purpose of imparting a rudimentary knowledge of magnetic and electrical phe- 

 nomena." — Nature. 



" The treatment is simple and clear, and the experiments given are admir- 

 ably chosen ; by their aid the subject is logically developed, and they are such 

 as can be performed with very simple apparatus. . . . Altogether, this is 

 one of the best primary books on physics that we have seen." — Critic, New 

 York. 



PRACTICAL PHYSICS. 



By R. T. Glazebrook, M.A., F.R.S., and W. N. Shaw, M.A., Demon- 

 strators at the Cavendish Laboratory, Cambridge. With Woodcuts. 

 (Text-Books of Science.) 



This book is intended for the Assistance of Teachers and Students in Physi- 

 cal Laboratories. It contains chapters on Physical Measurements, Units of 

 Measurements, Physical Arithmetic, Measurement of the more Simple Quanti- 

 ties, Measurement of Mass and Determination of Specific Gravities, Mechanics 

 of Solids, Liquids, and Gases, Acoustics, Thermometry, and Expansion. Cal- 

 orimetry, Tension of Vapor and Hygrometry, Photometry, Mirrors and Lenses, 

 Spectra, Refractive Indices and Wave-Lengths, Polarized Light, Color Vision, 

 Magnetism, Electricity, Experiments in the Fundamental Properties of Electric 

 Currents, Ohm's Law, Galvanometric Measurement of a Quantity of Electric- 

 ity, etc., etc. 



LONGMANS, GREEN, & CO., 15 East Sixteenth Street, New York. 



