MICROSCOPE AND OPTICAL APPARATUS 17 



to the microscope, which he devised some 

 months ago, has reached perfection, and is 

 ready to be placed on the market. His note 

 was accompanied by photographs and descrip- 

 tions of the apparatus. It is too late for 

 insertion in this book, but full description, 

 with illustrations of work done by it, will be 

 found in my larger work when issued. I can 

 only say now that the arrangement is intended 

 to permit the instantaneous photographing of 

 living microscopic forms and growing cells 

 whilst under observation. The magnified 

 image is in clear view and at the desired time 

 the simple pressing of a pneumatic bulb 

 opens the shutter, exposes the plate and 

 secures the picture. It is simple, practical 

 and very valuable. 



