INSECTS EYES. 

 Leuwenhoeck, Barter, lleaumur, Lyonnet, Paget, Miiller, Strauss, 



s. 1. 



Duges, Kirby, &c., tlie following are the number of eyes in certain 

 species : 



Number of eyes. Number of eyes. 



The Ant and the Zenos 50 I The Cosus Ligniperda . 31300 



The Sphinx 

 The common Fly 

 The Silkworm 

 The Cockchaffer 



1300 

 4000 

 6236 

 8820 



The Dragon Fly 

 The Butterfly 

 The Mordella 



12544 

 17355 



25088 



4. But if the perfection found in the most minute workmanship 

 of nature excite our admiration, how much more must we admire 

 and wonder at the 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 



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