The Microscope. 29 



Following this is the diagnosis of the European Spongillidae, 

 translated from the Bohemian of Professor Vejdovsky; and then 

 comes a complete description of American species. We note numer- 

 ous references to the many discoveries and excellent work in this field 

 of our esteemed contributor, Mr. H. Mills, of Buffalo. 



In the preparation of this work, the author has shown the spirit 

 of the scientist in its highest sense. He has snatched minutes, or a 

 few hours, from the time of a very busy life and devoted it to his 

 favorite study with no hope of reward, save in his own satisfaction 

 and the praise from the scientific world which is so sure to follow. 



Living Lights : A. Popular Account of Phosphorescent Animals and 

 Vegetables, by Charles Frederick Holder. New York : Charles Scrib- 

 ner's Sons, pp. 187. 



The object of this work is to create an interest for natural history 

 in the young. The method adopted by the writer to bring this about 

 is certainly the correct one. He has appealed to the marvelous in 

 nature, and while many of his descriptions have the absorbing inter- 

 est of the fairy tale, they possess the merit of absolute accuracy. 

 And, what is more, the interest thus aroused will impel the youth of 

 any parts at all to continue his investigations still further, even 

 though they may lead him to somewhat dry details. The illustrations 

 are in harmony with the text, and even grown-up people cannot fail 

 to linger over them. Works of this kind are entitled to much of the 

 field now occupied by the Oliver Optics, and we wish there were 

 more of them. 



Natural Law in the Business World, by Henry Wood, Esq. Boston : 

 Lee & Bhepard. New York: Charles T. Dillingham. Paper, pp. 222. 



This work, which has already achieved a large circulation, cer- 

 tainly deserves to be still more widely read. The questions discussed 

 are not approached in a fanciful or theoretical way, but are treated 

 in an eminently practical manner. The natural laws which govern 

 human relations are as incontrovertible as those of gravitation. Mr. 

 Wood has attempted, and with much success, to explain and make these 

 laws more prominent, which, if heeded, would do much to neutralize 

 the harmful theories so prevalent at the present time. It is a strong 

 book and capable of much good. 



The American Printer: A Manual of Typography, Etc, Etc.. by 

 Thomas MacKellar, Ph. D. Philadelphia: The MacKellar, Smith & 

 Jordan Co., pp. 383. 



This book, now in its sixteenth edition, is too well known to need 

 recommendation. The rise and progress of printing, and all the 

 departments of the art, are clearly and concisely treated, making 



