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Journal of Applied Microscopy. 



Journal of 

 Applied Microscopy. 



Issued Monthly from the Publication Department 



of the Bausch & Lomb Optical Co., 



Rochester, N. Y. 



L. B. ELLIOTT, Editor. 



Address all communications to 

 Publication Depabtment, 



BAUSCH & LOMB OPTICAL CO., 



Rochester, N. Y. 



ONE DOLLAR PER YEAR. 

 To Foreign Countries - - $1.25 Per Year. 



Entered at the Posi-o^ice, Rochester, N. F., as second-class matter. 



APRIL, 1898. 



EDITORIAL. 



So many requests for the publication of 

 matter of a more elementary nature than 

 has heretofore appeared in our pages, 

 have reached us during the past month, 

 that we have decided to introduce a 

 department devoted to elementary micro- 

 scopical technique. 



The papers by Dr. G. Carl Huber, 

 which began in the March issue, are a 

 fair sample of what we expect to do in 

 this line. Dr. F. G. Novy, University of 

 Michigan, will, later, contribute some 

 practical directions for staining and 

 mounting the most commonly met with 

 pathogenic bacteria. "We will also have 

 papers on preparing and mounting rock 

 sections, insects, botanical sections, etc. 



This department will in no way inter- 

 fere with the general character of the 

 Journal, but may be regarded simply as 

 an addition to it for the benefit of a large 

 number of our readers who are not spec- 

 ialibts. 



The writers of recent biological text- 

 books for use in secondary schools rare- 

 ly deem their work complete without the 

 addition of an appendix informing the 

 instructor what, in the author's opinion, 

 is the best apparatus for the equipment 

 of a laboratory, where it can be had, and 

 the lowest rate at which it can be ob- 

 tained. The idea itself is, in the main, 

 a good one, the exception being the quo- 

 tation of prices. The prices of six 

 months ago are not the prices of to-day, 

 and we venture the assertion that even 

 the manufacturers would hesitate to pre- 

 dict what the prices will be six months 

 hence. We are, therefore, forced to the 



conclusion that such information is of 

 little value for the purpose intended and 

 might better be omitted, especially since 

 it is liable to prejudice the public with- 

 out cause against apparatus which might 

 otherwise be used with profit and satis- 

 faction. Text-book writers might well 

 bear in mind the fact that, since im- 

 provements in apparatus occur almost 

 daily, while text-books undergo revision 

 at comparatively long intervals, state- 

 ments regarding the adaptability or non- 

 adaptability of any particular make 

 should not be too positive. 

 * * * 



The International Health Exposition 

 will be opened in the Industrial building. 

 Grand Central place, New York City, 

 April 25th, and continue until May 31st. 

 The exposition is intended to show the 

 progress made in the solution of sanitary 

 problems in every field of sanitary work. 

 The principal departments of the expo- 

 sition are domestic sanitation, muni- 

 cipal hygiene, food products, health re- 

 sorts and sanitariums, hygienic litera- 

 ture, sanitary organizations, military and 

 naval hygiene, animal sanitation, indus- 

 trial hygiene, preventive medicine, fire 

 protection, etc. In connection with this 

 exposition, it is desired to make an ex- 

 hibit of microscopical preparations, 

 showing the bacterial causes of disease, 

 the effects of various kinds of labor on 

 the organs of the body, for example, 

 deposits of substances in the lungs, and 

 of adulterated food products. Sets of 

 two slides, one showing pure and the 

 other adulterated foods, are suggested. 

 Lantern slides will also be required and 

 may be of any subjects illustrative of the 

 causes and effects of disease due to Im- 

 perfect sanitation, unhealthful occupa- 

 tion and the like. 



Any such exhibits may be forwarded 

 to the Journal of Applied Microscopy, 

 and we will be responsible for the safe 

 return of same after the exposition. Each 

 specimen will be exhibited under the 

 name of the sender and credit given ft^r 

 lantern slides, etc., used. Exhibits 

 should reach Rochester as early in the 

 month as possible. 



NOTES AND QUERIES. 



This space is intended for inquiries regarding 

 subjects not otherwise touched upon. Answers to 

 inquiries will be published over the signature of 

 the writer. 



A simple method of demonstrating the 

 circulation in the mesentery of the frog 

 with the stereoptlcon is desired. 



NEWS AND NOTES. 



Personals, news items, notices of meetings of 

 societies, conventions, etc., will be received up to 

 the twenty-second of the month preceding issue. 



