The Microscope. 379 



How TO DISTRIBUTE DIATOMS EVENLY On a cover glass is no 

 small art. The Cole Studies recommend that the liquid con- 

 taining the diatoms be dropped from a considerable height, and 

 thus an even dispersion will be effected. 



PVBLICATIONS 



The microscope and microscopical methods, by Pi'of. Simon 

 H.Gage. 8vo., pp. XIV, 96. Illustrated. Ithaca, N.Y.: Andrus 

 & Church. Price,paper, $1.00 ; half leather, $1.25. The previ- 

 ous editions of Prof. Gage's book met with the commendation 

 of every microscopist into whose hands it fell, although it was 

 never regularly in the market, having been primarily prepared 

 for the author's classes in Cornell University. This, the third, 

 edition is prepared for the same purpose, yet it is, fortunately, 

 not limited to that object, so that microscopists need not, as 

 formerly, be under obligations to the author for a complimentary 

 cop3^ At its low price, the book is within reach of every 

 reader and of every worker with a microscope. If the owner of 

 his first instrument will carefully read this pamphlet and will 

 follow all the experiments described by the author, he will find 

 that he has within his reach almost a royal road to the proper 

 understanding of the microscope, of its manipulation and of the 

 elementary preparation of objects, although the latter is exceed- 

 ingly concise and somewhat meagre. The book contains much 

 that is scattered through many books and magazines, and thus 

 not within ready access of the amateur or the beginner. Its 

 statements are correct and the result of much pains-taking 

 research and study. Prof. Gage's description of the proper 

 methods of using the Abbe camera lucida are the best that have 

 come within my knowledge, and Mrs. Gage's original device for 

 using the camera with the microscope in an inclined position 

 without distortion of the drawing, will be a welcome suggestion 

 to those that are less ingenious and less well informed in the 

 optics of the apparatus. Her method of overcoming the trouble 



