The Microscope. 283 



press just in time for us to take advantage of it for the holiday 

 season. We cannot have too many such works as these. What 

 better reading can we have for the household ? 



The Use of the Microscope. By Dr. Carl Friedlaender, of Ber- 

 lin, Translated by Henry C. Coe, of London. Second edition, 

 enlarged and improved. Large 8 vo. pp. 200. D. Appleton & 

 Co., New York. 



In this work we find a brief description of the microscope 

 and its accessories, followed by quite a complete account of re- 

 agents used in general work. Methods of preparing tissue are 

 briefly given, while the examination of fluids is given to some 

 length. The work is somewhat elementary in character and 

 contains those methods in general and well known use. Yet 

 they are collected together here in a convenient and compact 

 manner, thus making the work of value to all as a work of 

 reference and of especial value to the beginner who is not as 

 yet in possession of a complete library on microscopical tech- 

 nique. 



The Century. 



Our readers will be very much interested in reading an ar- 

 ticle on "Dangers in Food and Drink" which appears in the 

 December number of this journal. It tells of the wide spread 

 use of adulterants in our foods and dangers in our water supplies. 

 There is an instructive and highly entertaining article by Mark 

 Twain on "A Campaign that Failed.'* War articles and other 

 interesting matter make this an exceedingly interesting number. 



EXCHANGES. 



(.Exchanges are inserted without charge. Subscribers having microscope apparatus for sale or 

 exchange can announce the same without charge.) ' 



ONE-TENTH immersion, adjustable obj. by Gundlach. for sale. 

 HAROLD PLOWE, 136 High St., Peoria. 111. 



WANTED— A Microsteriopticon in exchange for a first class 1-10 Immersion Objective. 

 WM. C. BRIT f AN, 11 Washington Ave., Detroit. 



FOR EXCHANGE— -A Hartnack 1-11 objective, 170°. Will exchange for a good low power glass. 

 A. Y. MOORE, 67 Euclid Ave., Cleveland, Ohio. 



FOR EXCHANGE— One Fiddian Microscopic Illuminator, one Brass injecting Syringe with four 

 pipes and stop cock, one Microtome (Brass) Rivet, improved, with knife, one Dr. Seilers Section 

 Knife and Carrier, one warm Stage with Thermometer and Gas Chamber in exchange for first 

 class Polariscope with goniometer Eyepiece or collection of thin mounted Rock sections. 



DR. HENRY FROEHLING, 17 South 12th street, Richmond, Va. 



