52 Photographic Notes. 
Photographic Microscopic Stereographs.*—There are innu- 
merable bodies in the world of small things which can only be 
observed, so as to realise their configuration, by a binocular 
microscope; and in the case of such objects, no matter how 
much they may be enlarged by photography in the usual way, or 
with what perfection their detail may be rendered, they still afford 
a very inadequate idea of their form. 
Our object at the present is to point out briefly some methods 
by which the possessor of an ordinary monocular microscope may 
be enabled to photograph any suitable object with all the relief as 
seen in the finest binocular instruments, and this, too, without 
incurring much expenditure for costly appliances. Premising that 
the method to be described is intended for employment with low 
powers, we shall explain its principle of action by a simile we 
employed many years since, when we had occasion to introduce it 
to the notice of our readers in those days. Let a bust or sta- 
tuette be placed on a table at a distance of a few feet from a 
single fixed camera, and a negative be taken. Now, without 
moving the camera, rotate the statuette on its axis in the slightest 
degree, and then take a second negative. Prints from these two 
negatives, when mounted side by side on a stereoscopic card- 
mount and examined in the stereoscope, show the image in all the 
solidity that could be desired, the amount of relief being deter- 
mined by the extent to which the original object was rotated 
previous to the second negative being taken. Reasoning from 
analogy, we now proceed to apply this system to the production of 
micro-stereographs. 
The object-slide must not be placed flat down directly on the 
stage of the microscope, but upon a secondary or super stage, so 
constructed as to allow of a small platform, upon which rests the 
object-slide, to oscillate from right to left within a limited sphere. 
The one we constructed for the purpose is made of thin brass, 
pivoted at its two sides into guiding side-pieces, the axis of motion 
being adjusted so as to coincide with the object to be photo- 
graphed. Having focussed the object, and using a diaphragm in 
front of the objective so as to increase its penetration, the first 
photograph is taken when the little see-saw slide-holder is tilted to 
one side, after which it is tilted to the opposite side preparatory to 
making the second exposure. The amount to which the tilting 
takes place must be only very slight, else the apparent solidity of 
the image, when subsequently examined in the stereoscope, will 
be exaggerated. 
Success in this is ensured by employing an objective of small 
* From Zhe British Journal of Photography. 
