and Laboratory Methods. 1683 



attached to the ground glass of the camera by Canada balsam — and leaves the 

 operator's hands free for manipulating the other parts. 



The apochromatic lenses give much better results than can be obtained with 

 the ordinary, so that it is well worth the while, if one does very much work, to 

 pay the extra price for these lenses. In this connection also, a mechanical 

 stage fitted to the microscope pays for itself in a short time in the rapidity and 

 ease of finding a particular part of the mount. 

 Purdue University. Katherine E. GolDEN. 



A Photographic Apparatus for Pathological and Bacteriological 



Specimens. 



Messrs. Folmer & Schwing of New York have lately constructed for Cornell 

 Medical College a photographic apparatus for taking gross pathological or 

 bacteriological specimens, which seems to be of a sufficiently serviceable nature 

 to be put on record in the Journal. 



The main feature of the apparatus is that the camera can be used horizon- 

 tally, vertically, or at any angle desired. 



Fig. 1. — The apparatus in horizontal position. 



The table on which the camera rests is solidly built of hard wood, 6 ft. 8 in. 

 long, 1 ft. 8 in. wide, and 3 ft. 2 in. high. 



On the table is a platform which carries the bed on which the copying 

 camera runs. The platform being hinged on the table in front, can be raised 

 from the horizontal to the vertical position, and is held in the latter, or at any 

 intermediate angle, by slotted side arms, one on either side of the table, which 

 can be securely locked by a bolt passing through the table, a milled head nut 

 being attached at either end of the bolt. 



The detachable adjustable specimen holder, 14>^ inches square, is fastened 

 by thumb screws to a telescopic bed, which may be extended 4 ft. 6 in. beyond 



