Hare on the Galvanic Deflagrator. 99 
sub-bilobo, squama oblonga obtusa breve aristata majoribus. 
Culm 15--24 inches high, reddish at base, leafy and sub- 
procumbent ; leaves linear lanceolate, shorter below, 
sheathing ; upper leaves and bracts long as the culm ; 
spikes filiform, slender, often two inches long, pendulous, 
rather loose flowered, with filiform and delicate peduncles 
projecting considerably from pretty long sheaths; the 
highest spike has sometimes very few pistillate flowers and 
is occasionally entirely staminate ; fruit 3-sided, oblong, 
-obtuse, slightly nerved, glabrous, with a sub-oblique and 
two-lobed membranous orifice ; stigmas three ; staminate 
scale oblong, obtuse, white with a green keel; pistillate 
scale oblong or sub-ob-ovate, obtuse, with a short awn, 
white on the edges, and green on the keel, and about half 
the length of the fruit. The whole plant is glabrous and 
light green. 
Flowers in May—grows in moist meadows—common. 
This plant is clearly distinct from the preceding species,. 
and there is no figure corresponding to it in Schk. 
The two preceding new species belong in the same sec- 
tion with C. virescens in Ph.—the caption of the section 
being corrected as mentioned, Vol. VII, p. 274. It was 
thus corrected in the Manual of Botany, 3d Ed. 
PHYSICS, CHEMISTRY, MECHANICS AND 
MATHEMATICS. 
—-—Coe—- 
Ant. V.—Letter from Rost. Harr, M. D. Professor of 
Chemistry in the Unversity of Pennsylvania, to B. Siut- 
man, Professor of Chemistry in Yale College, on some im- 
proved forms of the Galvanic Deflagrator; on the supe- 
. riority of its deflagrating power; also an account of an 
improved Single Leaf Electrometer ; of the combustion of 
Tron by a jet of Sulphur, in vapour ; and of an easy mode 
of tmtating native Chalybeate Waters.--Reprinted with 
_ corrections and additions, from Silliman’s Journal, No. 1. 
Vol. VII. 
After I had discovered that the deflagrating power of a 
series of galvanic pairs was surprisingly increased, by their 
