CJiemistry and Physics. 79 



with perfect sraootlmess, and since the perspective is unusuall}^ 

 broad. If it be not inappropriate in this place, the writer of this 

 inadequate notice desires to add emphasis to the remarks made by 

 Reid concerning the cordialitj^ always shown by Jones to his 

 students and friends, since he belonged to the latter group from 

 early boyhood and since he later had the honor of being one of 

 Jones' students and assistants on the Carnegie Foundation. 



11. s. u. 



6. The Theory of Measi(re7ne?its ; h J JjVcix^sTuttl¥.. Pp. xiv, 

 303, with 66 figures. Philadelphia, 1916 (The author). — In writ- 

 ing this text the author has kept in mind the needs of the student 

 of mathematics as well as those of the student of physics. No 

 knowledge of trigonometry, however, is presupposed, and none 

 is imposed upon the reader of the book. In addition to the 

 statements of facts and theory each of the chapters of the book 

 includes directions for actual experimental work to be performed 

 by the student, and the amount of this work has been so planned 

 that each lesson will require about three hours for the pupil of 

 average skill and ability. 



Although the field covered is comparatively small the subject 

 matter is taken up in elaborate detail. This may be seen at once 

 from the following list of topics: weights and measures, angles 

 and circular functions, significant figures, logarithms, small 

 magnitudes, the slide rule, graphical representation, curves 

 and equations, graphic analysis, interpolation and extrapolation, 

 coordinates in three dimensions, accuracy, the principle of coinci- 

 dence, measurements and errors, statistical methods, " deviation " 

 and "dispersion," the weighting of observations, criteria of rejec- 

 tion, least squares, indirect measurements, and systematic and 

 constant errors. The index follows an appendix of physical and 

 mathematical tables which have been prepared with extreme care. 



Notwithstanding the fact that the material is presented in 

 great detail the text has not been " padded " or overexpanded. 

 It has been carefully graded and many parts may be omitted if 

 the student is already conversant with them. This book undoubt- 

 edly merits the attention of all earnest teachers of elementary 

 physics and mathematics since it contains a wealth of valuable 

 pedagogical material and since it is admirably designed to cause 

 the student to think for himself in a clear, concise, logical manner. 



H. s. u. 



7. Laws of Physical t^cience ; by Edwi^n" F. Noethkup. Pp. 

 vii, 210. Philadelphia, 1917 (J. B. Lippincott Co.).— This vol- 

 ume is designed as a reference book on the general propositions 

 or laws of physical science. The material is systematically 

 arranged in six parts pertaining respectively to I Mechanics, II 

 Hydrostatics, Hydrodynamics and Capillarity, III Sound, lY 

 Heat and Physical Chemistry, V Electricity and Magnetism, and 

 YI Light. Whenever doubt arose as to whether an important fact 

 could be classified as a law "a policy of inclusion has been fol- 

 lowed in preference to one of exclusion." The manner of pre- 



