Journal of Applied Microscopy. 



2d 



ratus and chemicals for developing, 

 printing, and flnishing the prints. The 

 simplicity and practical nature of this 

 whole arrangement is best seen when 

 the laboratory is in use. When the 

 students enter, the room is entirely 

 clear, not a bottle or dish in sight except 

 the small glass waste jar and eye-shade 

 on each table. It is, however, but the 

 work of a moment for each to open his 

 locker, secure microscope, reagents, 

 and material, all of which are placed on 

 the work table (T), and commence work. 

 At the end of the period a scarcely 

 longer tim.e is required to replace the 

 apparatus on the reagent boards and 



laboratory work, and forms the basis 

 for all the other courses in which the 

 microscope is used.t The equipment for 

 this work consists of a good working 

 set of accessory apparatus, including 

 camera lucidas, polariscopes, micro-spec- 

 troscopes, filar micrometers, ocular 

 micrometers, cover-glass gauges, aperto- 

 meters, a complete micro-photographic 

 outfit; a complete photographic outfit 

 for macroscopic work and a collection of 

 microscope slides especially prepared as 

 test objects to deterniine not only the 

 quality of the objectives and other 

 optical apparatus, but to prove the val- 

 idity of the images seen. There are 



CA5INEt rOR MICROSCOPEIS 



put them in the lockers again, leaving 

 the laboratory as clear as before, no 

 misplaced articles, no apparatus exposed 

 to dust and danger of breakage, and 

 above all the habit of " method " instilled 

 into even these well-grown pupils. 



This is one of the few laboratories in 

 the country where it is deemed necessary 

 to teach the student the proper use of 

 his tools before he is given journeyman's 

 work to do, and one of the still fewer 

 number in which will be found an 

 accessory equipment adequate or planned 

 for the purpose of demonstrating the 

 points which the student will be required 

 to know in order to do intelligent work 

 with the microscope. The course in the 

 practical use of the microscope extends 

 over Ave weeks, consists of lectures and 



enough of each kind of object so that 

 each student may have one.J The idea 

 is to have the student actually do all 



tThe basis of this course is Professor 

 S. H. Gage's book, "The Microscope and 

 Microscopical Methods," the subject mat- 

 ter of which treats of the microscope and 

 its parts, lighting, focusing, manipulation 

 of objectives and care of the microscope 

 and the eyes, interpretation of the appear- 

 ance of objects under the microscope, 

 micrometry, drawing with the microscope, 

 micro-spectroscope and polarlscope, slides 

 and cover glasses, mounting, sectioning, 

 isolation, preparation of reagents, micro- 

 chemistry, etc., etc. 



$To give an idea of the scope of this 

 work I noted the objects in the first few 

 drawers of the test-slide cabinet: fly's 

 wing, striated muscle, blood of necturus, 

 letters and figures printed in black on thin 

 paper and mounted in balsam, Pleurosigma 

 angulatim. Bacillus coll, etc., etc. 



