92 Tue MrIcroscopr. 
the inhabitants of which may very probably be seen in the pro- 
cess of emerging from the opened end of theegg. The female 
insect, upon leaving the egg, has six legs, two long hair-like ap- 
pendages, and no wings; it thrusts its sucker into the orange, 
in order to obtain nourishment, and never moves again, passing 
through the various stages of development until it lays its eggs 
and dies. In the case of the male insect, the chrysalis, after a 
short period, opens and the insect flies off. The male is supplied 
with wings twice the length of its body, and each of the legs 
has hook-like projections. It has four eyes and two antenne, 
and is so tiny that it cannot be seen flying. From some parts 
of Spain, oranges ¢ome to us having their rind covered with a 
coccus of quite a different type. The surface of oranges, indeed, 
affords the possessor of a microscope an infinite amount of in- 
terest and amusement.—Extracted from Chambers’s Journal. 
M. A. Henry. 
A SIMpte CELL For Fiui Mounts.—I have lately been using 
a cell for fluid mounts, which I think will answer, and as it is 
rather a simple affair, perhaps others might like to try it. Cut 
cardboard rings (I use gun punches of different sizes for 
this purpose); the ordinary post-card will be found the most 
convenient thickness, and place them in patent knotting fora 
day until thoroughly saturated; then hang them on a cotton 
line, separating so that they do not touch, in a warm place until 
thoroughly dry. They can then be'put away till wanted for use. 
To fasten these cells to the glass slips, 1 make a good ring of 
gold-size, and press the cell well down into it, then use mod- 
erate heat, and put by until cool; the ring should then be se- 
curely fastened to the slip. Now examine well to see if air ap- 
pears under the cell; if so, place more gold-size round, and 
heat again. After the ring is firmly fastened, I cover it with a 
mixtureeof gold-size and oxide of zinc, placing a circle of this 
cement on the inside edge of the ring. This is a great safe- 
guard against air bubbles. I have had some objects in glycerine 
fluid in these cells since the beginning of August last, and there 
is nothing the matter with them yet. The gold-size and oxide 
of zinc make a capital cement for fluid mounts; it is very safe, 
and dries well. M. Farwaty, 7 Lorna Road, West Brighton. 
(All the above are from the Journal of Microscopy.) 
