1890.] MICROSCOPICAL JOURNAL. 107 



" Our Vacant Chairs," response by William Norris. 



"• Our Future," response by A. H. Brcckenf'ekl. 



"Our Friends," response by Professor E. W. Runxon. 



'' Our Future Members," response by Dr. H. W. llarkiiess. 



NOTICES OF BOOKS. 



^lodern Scioicc and Afudrrn "JhoiigJit. liy S. Laing. Tiic llum- 

 boKlt PubHshini^ Co., New York. 



Tile principal results of Modern Science, and tiie revcdutions they 

 have etlected in Modern Thought, are concisely presented. Here are 

 displayed the results of recent incjuiries into the composition and con- 

 stitution of the earth and of the universe, into the nature and laws of 

 matter, the development of organized and animated existences, the his- 

 tory of man, the myths of all races and the religions of all peoples ; 

 discussions of the nature of force, motion, electricity, light, and heat. 

 Utilitariaitism. By John Stuart Mill. The Humboldt Publishing 



Co., New York. 



There could be no better evidence of the good work being done by 

 the pul)lishers of" The Humboldt Library " than the present volume. 

 They publish " Utilitarianism " at the modest price of fifteen cents, 

 whereas the imported edition costs $1.75. And yet this fifteen-cent 

 edition is fully the equal of the London edition in type, paper, and 

 presswork. 

 The Electric Lights and The Storing of Electrical Energy. By 



Gerald Molloy,"D. D. The Humboldt P\iblishing Co., New York. 



This number of " The Humboldt Lii)rarv of Science " contains much 

 information on a subject of supreme importance to the present genera- 

 tion. Dull, indeed, must be the reader who would fail to l)e instructed 

 by the abundance of facts and wealth of illustrations here presented. 

 School Algebra. By Ir^-of. G. A. Wentworth. \-i\ -Xi^z pp. Ginn 

 & Co., Boston. (Price, $1.25.) 



This elementary algebra is intended as a High School text-book, and 

 covers ground sufficient for admission to any American college. Great 

 care has been taken in culling out the unimportant matter so that no 

 time need be spent in learning that which is of no use in the higher 

 branches of mathematics. The introductory chapter, which is always 

 of the utmost importance, brings before the student in brief review the 

 knowledge he has already gained from the study of arithmetic. The 

 meaning of the negative quantities is also explained and the laws which 

 regulate the combinations of difierent arithmetical numbers are shown 

 to apply to algebraic numbers. The ground covered by the volume 

 extends through logarithms and includes much of the matter treated of 

 in the author's College Algebra. 



Protoplasm and Life. By Charles F. Cox, M. A., 12°, 67 pp. N. 

 D, C. Hodges, New York, 1890. (Price, 75 cents.) 



This volume consists of two essays, the first on "• Protoplasm and 

 cell doctrine," and the second on " Spontaneous generation theorv, and 

 its relation to the general theory of evolution." The author of this 

 book has been for several years president of the New York Micro- 



