INTERNAL ANATOMY OF INSECTS. 201 
Before concluding these remarks on the Internal 
Anatomy and Physiology of Insects, I shall explain to 
you, as you will probably feel inclined occasionally to 
pursue the subject, the best mode of dissecting them. — 
By far the most useful dissecting instruments for this 
purpose are very fine-pointed and sharp scissors, as these 
will enable you to divide the integument and separate 
other parts with much less risk of injuring their delicate 
structure than any knife. These scissors are what Swam- 
merdam chiefly used; and he had some so extremely 
small and fine, that he was necessitated to employ a lens 
when he sharpened them. If to these be added a sharp 
and fine-pointed knife or two, some needles fixed in 
handles, also fine-pointed — (you will find them more 
convenient than any other instrument for detaching 
minute parts and fibres,) a pair of fine and accurately 
adjusted pliers, and an assortment of camel' s-hair brushes, 
— you will be nearly set up as an Entomological dis- 
sector. You will still, however, require a small dissect- 
ing table, with a projecting and moveable arm for lenses 
of various descriptions, so as to admit both the hands 
to be employed upon the subject under examination; 
and for this purpose probably no contrivance can be 
better adapted than that of Lyonet, of which the figure 
in Adams On the Microscope will convey a better idea 
than any description a . 
Previously to dissecting any insect, it must be killed 
by plunging it into boiling water, which is recommended 
by Lyonet, or spirits of wine or of turpentine ; and it is 
often useful to Jet larvcc remain a few days in the latter, 
• /. vi.y: 3. 
