NOTES ON PHOTO-MICROGRAPHY. 9 
find that a special camera, or a special microscope, or sometimes 
both combined, is needed, and, furthermore, we are repeatedly 
warned that it is almost useless to expect to obtain good results 
with anything less elaborate than the apparatus described. The 
exposure required is also usually very long. 
There is figured, however, in the work of Beale, to which I 
have already alluded, a mode of adapting the camera to the 
microscrope, which is adopted by Gerlach and which the author 
dismisses in a couple of lines. It consists in connecting the camera 
to the tube of the microscope placed upright. My friend, Dr. 
George Harrow, has lately adopted the same method, as being the 
only arrangement which allows a temporary microscopic prepara- 
tion, such as yeast, to be photographed. The same arrangement 
is employed in the apparatus which I have the pleasure of 
bringing before you this evening. This apparatus possesses the 
advantages of being comparatively inexpensive, easily portable, 
occupying only a small space, adapted for use with any kind of 
microscopical preparation, and, as I hope to show you, capable of 
turning out very good results; it moreover requires only an 
ordinary camera and microscope. 
It consists of a small quarter-plate camera—Lancaster’s “ Le 
Meritoire ”—with the lens and front removed, and the body made 
rigid by means of small wooden supports and a brass plate 
securely fastened to the top of an oblong wooden case, with one 
side removed and with a circular hole cut in the top immediately 
under the camera. The microscope is placed in the case either 
standing on the bottom or raised by means of blocks. The case 
itself stands on a three-legged support. 
Plate I., Figs. 1, 2, and 3, shows the apparatus in three different 
positions, front, back, and side, and renders the construction easily 
intelligible. 4 is the camera, maintained in a rigid state by 
means of the four wooden pillars @ a, which are kept in position 
by means of pins and hooks, and by the brass plate 4, which is 
fastened to the camera by means of the screws provided for the 
brass-strip of the camera, as ordinarily used. The camera is 
secured to the wooden case B, by being accurately fitted between 
