CHAS. LENTZ & SONS 
ilnaerobic 3ars 
No. 2630 No. 2632 No. 2634 
2630. Anaerobic Jar, devised by Mazyck P. Ravenel, M.D., Bacteriolo- 
gist to the State Live Stock Sanitary Board of Pennsylvania, etc. 
Consists ol a well annealed glass cylindrical jar with constriction dividing 
it into two chambers, which communicate. Size of upper chamber (inside) 
7x3 inches; diameter of mouth, 1-5 inches; size of lower chamber, 3x2 
inches. The inoculated test-tubes (preferably 6 x f inches) are placed in- the 
upper chamber and are supported by a wire gauze partition (upon which a layer of 
cotton is placed) which rests upon the shoulders of the constriction in jar. The 
jar having been closed, an alkaline solution of pyrogallic acid is introduced into the 
lower chamber up to the opening of tube. " This tube is then at once connected 
with the air-pump, and the upper tube with a hydrogen generator, the stopper B 
being so turned as to close the jar. When the air has been exhausted, as indicated 
by the vacuum meter, the lower stopcock is closed and the jar filled with hydro- 
gen. The hydrogen is then cut off and the jar again exhausted and again filled 
with hydrogen, the process being repeated three times in order to make sure of all 
the hydrogen being removed. The jar is then sealed above and below, and placed 
in the incubator." The size of this jar renders it very convenient tor placing in 
the incubator, and there is no central glass tube to interfere. 
A, outline cut of jar complete. 
B'represents section of stopper showing inlet for hydrogen. Drawn to larger 
scale than A. 
2632. Novy^s Apparatus, for Petri dish cultures of anaerobic bacteria, 
size of lower chamber 130 mm. x 130 mm., each $4 00 
2634. Novy's Apparatus, for tube cultures, for hydrogen or pyrogal- 
late method, 100 mm. inside diameter for tubes up to 150 mm. 
long, each 2 50 
2636. Novy*s Apparatus, diameter 80 mm. for tubes up to 125 mm. 
long 2 25 
9S 
