OF VITAL ENERGY. 581 



butterflies still more. Corresponding also with 

 the facts exhibited in Table III. p. 566, we 

 learn from the experiments of Mr. Newport, 

 recorded in the Phil. Transactions for 1836 7, 

 that wasps, hornets, beetles, moths, and some 

 other insects, have a much higher temperature 

 than that of the surrounding air, and that it is 

 always in proportion to the quantity of oxygen 

 they consume by respiration, which is always 

 augmented by exertion, ^nd diminished by re- 

 pose. 



In accordance with the above facts, and with 

 all the analogies of nature, the whole organiza- 

 tion of the higher insects is very complex and 

 refined. For, although like all avertebrated ani- 

 mals, they have no brain in the head, nor central 

 sensorium, they are supplied with a series of 

 knots or ganglions, extending along the interior 

 of their bodies, and connected with each other 

 by nervous cords ; while it is known that some 

 of them are covered over with organs of vision. 

 Hence the extreme acuteness of their senses, 

 and the wonderful sagacity displayed in the eco- 

 nomy of bees, ants, and many other species of 

 insects. The honey-bee has, to a certain extent, 

 the same emotions of fear, anger, revenge, and 

 affection as man. It also remembers, compares, 

 and reasons; for, while disporting in the joyous 

 sunshine, and culling sweets from the flowery 

 fields, it looks forward to a change of season, 



