104 THE MICROSCOPE. July 
the camera box, by which it is fastened to the tripod. 
One may easily make this stand for himself, or have it 
made by a carpenter at little cost. 
The lens of the camera is removed, and a funnel made 
of heavy, black cloth, or some corresponding material 
having flexibility, put in place of it, so that light-tight 
connection may be made between the camera box and the 
eye-piece of the microscope. If this cloth funnel be ter- 
minated in a small cone, made of tin or paste-board, to 
fit over the eye-piece, the adjustment to the microscope 
can be more rapidly made. 
By using a camera box, one can also use the ordinary 
plate holders for his negatives, and he can get his focus 
on the ground glass. Of course, the plates may be devel- 
oped at one’s leisure. 
The advantage of the apparatus is that one can, with 
slight cost, have at hand in the laboratory, means for 
making a permanent record of any peculiarity in a sec- 
tion that he may find, with the expenditure of very little 
time. 
It will be found that greater uniformity in the nega- 
tives from the sections can be gotten by using an artific- 
ial light rather than natural light; a Wellsbach incan- 
descent gas lamp gives good results. 
Photomicrograph of Spider’s Jaws.— Orthocromatic 
plates can be used with good results on this class of slides. 
The annexed photo is not offered to prove this, as experi- 
enced hands will be able to do much better; but it shows 
that detail can be clearly brought out by them, where an 
ordinary plate would be over-exposed in some parts and 
the detail not out in others. These plates take the brown 
and yellow tints much more readily than common plates. 
This photo was made on a Carbutt ortho plate, 40 seconds 
exposure, 2 in. objective, and no eye-piece. Ey 3) 
