* 
eastern U. S., presented; 2 spotted salamanders (Salamandra 
-~ maculosa), Europe and North Africa, presented; I 
camel (Camelus bactrianus) &, Asia, born in the Gard 
334 ; Scientific News. [ May, 4 
ways; but the first fundamental improvement was the self-center- 
ing table of Dr. Matthews, which centered the slide for width 
only between jaws swinging on opposite posts and held it in 
place by means of a sliding wedge. This method is greatly sim- 
plified without at all impairing its efficiency, by discarding the 
wedge and jaws and centering by the posts alone, in the table con-  _ 
trived and now made by Mr. Zentmayer. Mr. Cox has undisputed 
priority in the expedient which now surpasses all others, and seems 
ikely to continue to do so, of centering for both width and length 
by grasping the diagonally opposite corners of the slide between 
jaws that move automatically towards or from the center, after 
the manner of the different forms of American scroll chucks. In 
Mr. Cox’s table, now well known, the jaws are moved by a hori- 
zontal screw, with right and left threads on the opposite ends, 
under the revolving plate. Mr. Kinne adopted independently, but 
published subsequently, the same principle, but moved the jaws 
by a lever instead of a screw. Mr. Bulloch’s table is essentially 
double, of two horizontal plates, the jaws sliding through the 
It is one of the little things that are a great comfort. 
Bes 
SCIENTIFIC NEWS. 
— Recent arrivals at the Philadelphia Zodlogical Garden: I 
great-horned owl (Budo virginianus), presented; I zebu 
indicus) 2 , India, born in the Garden; 1 crested anolis (Anolis Ta 
tris), and 1 tree boa (Epicrates angulifer), West Indies, presented ; 
I macaque monkey (Macacus nemestrinus) 9 India, born in t 
Garden ; 3 alligators (A//igator mississippiensis), presented ; 
ring gull (Larus argentatus); 4 sirens (Siren lacertina), South- 
E. Brown, Genl. Supt., April 1, 1878 
Gé d 
bactrian 
en.—Arthur © 
