98 E. Cutter—Microphotography with Tolles’s Objective. 
our work has been concerned we know that we could not have 
attained our results with another objective like the ;!, for in- 
stance, with the ease and facility with which we did with the ,. 
While we feel sure that the practical clinical results of corrob- 
orating our study of consumptive blood can be attained with ob- 
jectives of 4 inch power—and it would be sad if it were not so— 
at the same time we are sure that no wrong has been done to 
any one by pressing the 4; into our service. Moreover, if by 
our simple arrangement we have been able to transfer images 
with the highest power objective ever thus used, those who pos- 
sess the low powers ought to be encouraged to use microphoto- 
graphy with the sunlight without condensing, or with the 
ordinary mirror, or with the B eye-piece. 
2. 
a 
Figure 2 is a section of the writer’s device for such work ; 
it may be gotten up at a trifling expense. a is the tube of 
the microscope ; 6 is a paper tube 80 by 2 inches. A nicely 
turned plug of wood adapts the microscope to the paper tube. 
To save space, the tube is broken off in the cut; a deal 8 by 12 
by 2 inches is seen in section, and fitted by a hole to the paper 
tube 6. c¢ is a section of the ground glass plate and holder, 
d is the clip to hold the plate holders. The artist has omitted 
the section of the lower cleat. This apparatus is adapted to a 
quarter plate and a two-inch photograph. An assistant should 
focus and adjust the light. 
With these simple arrangements it would seem that the hope 
expressed at the outset of this article should begin to be realized. 
Tremont Temple, Boston, April, 1879. 
Postscript.—The first microphotograph of this objective may 
be found in the Yale College Library. 
