we 
136  Crosse’s Experiments with the Voltaic Battery. 
lifted out the wires to examine them by a lens, yet it was not till 
the other day that I perceived any insect, and there are now three 
of the same insects, in their incipient state, appearing on the na- 
ked platina wire at the bottom of the quartz in the glass basin at 
the negative pole. "These insects are very perceptible and may 
be represented thus (magnified): fig. 8, 1 the platina wire, 2 the 
quartz, 3 the incipient insects. It should be observed that the 
. glass basin, fig. 7, has always been loosely covered with paper. 
The appearance of the insect has already been deseri- 
d. The filaments which project are in course of time seen to 
_ move, hefore the perfect. insect detaches itself from its birth, 
gs 
Fig. 5, front view of the filtering apparatus, ns the use of which; the insect de- 
scribed made its first appearance.- (A, B,) two of the four uprights or legs issuing 
from the base (c,) supporting a movable shelf (p;) which shelf is kept in its place 
by four pins (£) passing through the four uprights, and may be raised or lowered 
at pleasure. (F,) the top shelf, which has an aperture cut in it to receive the 
Wedgwood ware funnel (¢.) (H,) a- quart basin standing on an unseen 
within the funnel (¢,) which support is a circular piece-of wood with holes eut in 
it to allow the free passage of the fluid between the basin and funnel. This basin 
is filled with the fluid required, which is conveyed out of it by the strip of flannel 
(1,) hanging over the outside of the basin, and inside the funnel, and which, con- 
e falls in successive drops through the funnel (¢) upon the rh 4 
which is supported by the glass funnel (1,) kept constantly electrified by th 
_ wires Se N,) resting on the opposite sides of it, and connected with ee Ze 
ite poles of voltaic battery. (o,) a wide mouthed bollle standing on the base 
(c,) to reccive the uid as it falls from thes second funnel (x.) From this bottle, 
(oS EA TES a ee oe ee 
ne 
x 
4 
