4 BACTERIOLOGICAL DIAGNOSIS. 
highly commended. The stand is very firm and strong, 
the fine adjustment delicate, and the lenses altogether 
admirable. The only objection to this microscope is 
that it is rather heavy; this is an advantage for 
laboratory work, but it is a disadvantage for a medical 
man who may have to examine blood, &c., at the 
patient’s bedside. Swift & Son manufacture a micro- 
Fic, 3.—Portable Microscope.: 
scope of much the same type at about the same price; 
it has all the good points of the Leitz microscope and is 
somewhat lighter. The same firm also supplies a 
portable instrument, the cost of which (without lenses) 
is £5. This is very ingeniously made, and will carry an 
oil immersion lens quite well: it is perhaps the most 
suitable stand for a practitioner who may have to do 
