136 



Journal of Applied Microscopy. 



A New Portable Microscope. 



Some of the very early forms of com- 

 pound microscopes were constructed 

 with a view to portability, and, up to 

 the present time, efforts have been made 

 to construct instruments with this par- 



duction in weight has caused instability; 

 and finally, in some which have best 

 fulfilled all conditions, the price has been 

 prohibitory. 



The development of summer schools 

 and field laboratories, the physician's 

 desire to make a microscopical exami- 



Portable Microscope, one-third actual size. 



ticular end in view. Portability ne- 

 cessarily involves compactness and in 

 the forms heretofore constructed, this 

 feature seems to have predominated to 

 such an extent as to detract from effi- 

 ciency In some forms, the dimensions 

 have been reduced, resulting in a minia- 

 ture microscope, while, in others, the con- 

 c^truction of the folding parts or the re- 



nation at the bedside of the patient 

 the needs of traveling biologists, and 

 other users of the microscope would 

 seem to encourage efforts in the direc- 

 tion of a further development of the 

 portable microscope, and I believe the 

 construction of which a description fol- 

 lows offers a satisfactory solution of the 

 subject. 



