226 THE AMERICAN MONTHLY [Aug 
up by a carpenter to which the camera could be attached 
and on which, at a suitable level, the microscope and lamp 
could be placed in a fixed central position. 
A knowledge of photography is so general that it is 
hardly necessary to say that an acquaintance with de- 
veloping, printing, etc., is desirable; but with such con- 
trivances as those named, carefully arranged, really good 
results can be secured with low-power objectives. 
Success under such circumstances will lead to a desire 
to attempt more pretentious work with better apparatus. 
Photo-micrography has a charm of its own, but in order 
to attain proficiency it is essential that the worker pos- 
- sess a good practical acquaintance with microscopical 
manipulation and ordinary photography. The failures 
that are so freqnently met with are due in the majority 
of instances to ignorance of one or both subjects, in fact, 
the writer has met with people who have essayed to do 
photo-micrography without previous serious work with 
the microscope or knowledge of its limitations. A serious 
practical man can succeed with elementary arrangements 
where a novice with the best equipment of apparatus 
would fail. 
Low-PRICED OBJECTIVES.—Perhaps in nothing so much 
as in scientific work is the fear present that anything that 
is low in price is likely to be poor in quality and yield cor- 
responding results. Butitcan beclaimed that this does 
not apply to microscopical objectives. 
The past decade has seen a wonderful forward move- 
ment in the construction of these lenses. The almost 
general use of the microscope in laboratories, technical 
schools, for manufacturing purposes,and even in primary 
schools, added to the increasing recognition of its value 
as a means of recreation, has created a demand which has | 
been at all times a critical one. A few have always been 
‘quick to recognize the merit in lenses and to make their 
