insects’ eyes. 
Leuwenhoeck, Barter, Reaumur, Lyonnet, Paget, Muller, Strauss, 
Fig-1. 
Duges, Kirby, &c., tbe following are the number of eyes in certain 
species:— . 
Number of eyes. Number of eyes. 
Tbe Ant and tbe Zenos 50 I The Cosns Ligniperda . 11300 
Tbe Sphinx . . 1300 | The Dragon Fly . . 12544 
Tbe common Fly . . 4000 I The Butterfly . . 17355 
The Silkworm . . 6236 The Mordella . . 25088 
The Cockchaffer . . 8820 | 
4. But if tbe perfection found in tbe most minute workmanship 
of nature excite our admiration, bow much more must we admire 
and wonder at tbe approaches which have been made to a similar 
degree of precision and perfection by the comparatively feeble and 
imperfect agency of the human hand. We propose in the present 
article to call the attention of our readers to some striking exam¬ 
ples of such skill and address, with which the general public is 
not already familiar. 
5. The improvements which have been made within the last 
quarter of a century, in the construction of microscopes, has 
created a demand for a class of drawings and engravings of a 
degree of minuteness approaching to that of the objects to 
which the researches of observers have been addressed. This 
e2 51 
