The Microscope. 



223 



author treats of air and ventilation, heating and lighting; of 

 water, its functions and properties ; of food and its cooking ; of 

 •cleansing agents, and of poisons with their antidotes. But while 

 the book is laudable, it contains some errors that should not have 

 been overlooked. On page 149 it says that Agassiz found that 

 the body of "an aurelia or sun-fish alive weighed 30 l^s., yet 

 when dried yielded but half an ounce of solid matter." This is 

 somewhat of a libel on the animal ; substitute jell}^- fish and the 

 statement will be correct. The index is sadly in need of revis- 

 ing and of rearranging. 



Proceedings of the American Society of Microscopists. Vol. 

 XII. Price $2.00. C. C. Mellor, Pittsburg, Pa.— The annual 

 volumes published by the society have steadily increased in 

 scientific value and interest, from the first, now thirteen years 

 •old, to the present issue which is the superior of all its pre- 

 decessors. If the improvement shall continue to be as constant 

 and as even, the society will soon take a position of equality be- 

 side any similar association anywhere. The present volume 

 contains much of value, and should be welcomed by all micros- 

 •copists, whether they are members of the society or not. The 

 general index brings the preceding volumes within very conven- 

 ient consulting distance. 



C°RRESP°riDEnCE 



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Editor The Microscope : — 



In your April number is an article that mentions a good way 

 to make a reagent bottle, which if a person's time was of no 

 account would involve considerable skill to make, especially as 

 an article is already better made for four cents by the S. H. Wet- 

 more Co., 242 Pearl St., New York. 



This firm has a dropping tube combining a soft rubber bulb 

 and a cork in one piece; the glass points are of two sizes and 



