BACTERIOLOGICAL MICROSCOPE. 3 



it is useless to do so unless the stand is sufficiently 

 steady to carry an oil immersion lens : and it is useless 

 to think of having an inefficient fine adjustment altered 

 for bacteriological use. 



There are now many microscopes which are sold at a 



FIG. 2. Bacteriological Microscope. 



comparatively small price and which will answer every 

 purpose. Of these Leitz's lib stand, with the lenses 

 above mentioned, a triple nose-piece (which is so great 

 an advantage that it might almost be called an essen- 

 tial) and two eye-pieces costs about ^"13 and may be 



B2 



