1284 



Journal of Applied Microscopy 



workshops are open for the supply of an unlimited amount of perfect apparatus 

 for his purpose. 



But to most students and the great mass of workers, these doors are closed. 

 They simply have not the money to spare for such necessarily costly appliances 

 and doubtless many turn aside in despair at the impossibility of commanding 

 their use. But they need not. It is quite possible to do most of the work they 

 would need with appliances already in their possession or quite within their 

 means. The so-called student's microscope, generally in use in our colleges and 

 high schools, usually has an inclinable stand with two eyepieces, two objectives 

 of about 1 or 2/3 inch and 1/4 or 1/6 inch focus and an Abbe condenser. With 

 such an instrument it is quite possible to do most excellent photographing with 

 amplifications ranging from about 50 to 600 diameters. Very little tissue 

 work requires over .500, while most of it may be acceptably done at 100 to 200. 



■^V 



FIG. 2. MYXOMATOUS TISSUE. X 250. 



All objectives of reputable makers are now so well corrected chromatically that 

 there is little need to give the old bugaboo of focus difference consideration. 

 Every student has such a microscope at his disposal, so we find the optical 

 part of the question needs no further outlay. 



You will probably ask, "What about the camera, this must make an extra 

 cost ?" Not at all. While very convenient and highly to be desired, good work 

 can be done without a camera specially designed for the purpose. In fact, any 

 camera provided with a focusing screen and from which the lens may be removed 

 can be utilized in photo-micrography. A hand camera with these features is just 

 as good for the purpose as any other form, though probably not so convenient. 

 It merely requires to be firmly fastened to some support at such a height as to per- 

 mit the tube of the microscope (when inclined to the horizontal position) to enter 

 the lens opening and project the image of the object on the stage upon the foc- 

 using screen. The latter will be found too coarse for fine focusing, but the old 



