61 I
A CONVENIENT F O R M O F UNIVERSAL HAXD-CLAMP.
T h e difference in the fatty acids apparentin these two, and which would probably vary as much in other germs, could doubtless be made of use in classification. This study is being continued further and extended to the hog cholera, swine plague, and allied germs.
---.
Bacilli.
Ether and alcohol extract per cent.
Albuminoids per cent.
Ash per cent.
7 -
I 2 5 5 I percent percent I percent I e r c e n t percent Peptone Peptone per cent Peptone per cent Septone Peptone agar. agar. Soda. agar. Soda. agar. agar.
Pfeiffer’s capsule bacillus Pneumonia bacilIus Bacillus of Rhinoscleroma Spirillum of cholera............ No. 28..
....... 66.6 ............ 7r.7 .... 68.42 .... .........
73.1
70.0
79.8 76.2 64.96 79.6
.... .... .... .... ....
11.3
.... ....
10.36
9.1
....
9.33
14.06
9.10
........... .... 7.79
17.08
.... .... .... 30.78
..
*.
Kitroeen.
7
7
5
.... .... . . . . . . . . . . . . . . . 14.05
Tuberculosis Glanders Swine plague
I
per cent per cent per cent per cent Glycerol Artifi- Glycerol Peptone beef cia1 beef beef Car- Hydrobroth. media. broth. broth. boo. gen. Ash. per cent per cent per cent per cent per cent per cent per cent 7.34 8.94 62.98 7.34 1.77
...............
.... ....
41.89 11.81 44.57
5.89
5.18
7.20
12.41
BIOCIIEMIC LABORATORY, BUREAU OF ANIMAL INDUSTRY.
A CONVENIENT FORM OF UNIVERSAL HAND-CLAnP.’ BY
PETER ,T.AWSTENA N D W. A. HORTON. Received April 19, 1895.
T
HE various holders and hand-clamps used for holding test-
tubes and smaller forms belong, as a rule, to two classes. T h e bite is effected either by a spring or by a pressure exerted by the hand. T h e difficulty with the first class of holders is t h a t the spring is often inconveniently strong for delicate tubes, and not strong enough for flasks. T h e second class often fails when long continued holding is involved, as muscular pressure relaxes after a time. T h e following little device was worked out to afford a con1
Read before the New York Section, December, 1893.
612
E D G A R F. SXITH A N D D h X I E L L. WALLACE.
venient holder that should take froiii nothing up to a diameter of a n inch and a half aiitl yet allow a grasp which corresponds to t h e weight of the object Iieltl, aii(: also not tire the hand. no matter how long it is held.
T h e clutch B slides 011 the parallel bars I:, and is slightly smaller than the counter-clutch Ai. This, with its curvature. allows it to grasp any object, no matter how sninll, that is placed between I3 and A. A double bearing, to insure ease of iiiovenient, is effected by winding the wire at D. T h e double arch C allows the thumb to press easily aiitl comfortably against i t , and act a s a knee-joint. T h e slyell G keeps the handle in the grasp, and the rubber strap E' brings the traveling clutch back and opens the clamp as sooii as the pressure is reniol-ed from C . To use the apparatus, the liaiidle is securely grasped aiid the end of the thumb is placed against C . 0 1 1 straightening the thumb, in the niaiiner of a kiiee-joiiit, the object is tightly held between the clutches. T h e hand does not tire on contiiiued holding because the pressure is taken in 21 straight line on the Lories of the thumb, and hence calls for so slight ;i muscular action as to be practically iiiappreciable. T h e cla iiip is inanufactured b y Richards and Clonipany . O F Tl1E B R U O K L \ - X POLYTECHNIC INSTITUTE. __ -
C K K > I I C l K r 1,ABOKhTOHI
[ COXTRIBCTIOX FROM THE J O H N I I A X R I S O N 1,.\130R.%TORY OF
CHEMISTRY. No.
I.]
ELECTROLYTIC SEPARATIONS. BT
EDGAR
I?.
SMITH AND DANIEL
Received April
C
92.
L. WALI.ACE.
1895
OMMCNICXTIONS relating to the electrolytic separation of metals, present in solution as double cyanides, have appeared, from time to time, in this Journal and in other pub-
