OF MICROSCOPIC OBJECTS. 137 
pencil will render the adhesion complete, and cement the 
cover closely and firmly to the cell. When dry, an outer 
ring of asphalt makes the mounting neat and complete. 
The Fungi have been before mentioned; but it may be 
here stated that some few of the minute forms are best pre- 
served in a very shallow cell of liquid. For this purpose 
creosote-water may be advantageously used, 
The antenne of insects have been before noticed as being 
very beautiful when mounted in balsam. This is readily 
accomplished when they are large; but those of the most 
minute insects are much more difficult to deal with, and are 
less liable to injury when put up in fluid. Goadby’s Fluid 
serves this purpose very well; but, of course, the object 
must be thoroughly steeped in the liquid before it is 
mounted, for a longer or shorter time according to the 
thickness. 
The eggs of insects afford some worthy objects for the 
microscope, amongst which may be mentioned those of the 
common cabbage butterflies (small and great), the meadow- 
brown, the puss-moth, the tortoiseshell butterfly, the bug, 
the cow-dung fly, &c. These, however, shrivel up on be- 
coming dry, and must, therefore, be preserved in some of 
the fluids before mentioned. To accomplish this no parti- 
cular directions are required; but the soaking in the liquid 
about to be employed, &c., must be attended to as with other 
objects. 
Glycerine may be advantageously used for the preserva- 
tion of various insects. These should first be cleaned with 
alcohol to get rid of all extraneous matter, and then, after 
soaking in glycerine, be mounted with it like other objects. 
There is, however, a difficulty in clearing glycerine from 
the edge of the thin glass cover; but Mr. Whalley told me 
he met with no annoyance, After laying the cover upon the 
object with the glycerine, he took away all the superfluous 
liquid with a small piece of linen, cleaning it at last with a 
damped piece of the same. The small quantity of water 
which gets mingled with the glycerine does no injury, and 
