ANOTHER WORLD DOAVX HERE. f 11 



that we can perceive as heat is between three and four millions 

 of millions per second. The number of waves producing red 

 light is estimated at four hundred and seventy-four millions of 

 millions per second ; and for the production of violet light, 

 six hundred and ninety-nine millions of millions. These are 

 the received conclusions of our best mathematicians, which I 

 repeat on their authority. Allowing, however, a very large 

 margin of possible error, the world of possible sensations lying 

 between those produced by a few thousands of waves and any 

 number of millions is of enormous width. 



In such a world of intermediate activities the insect probably 

 lives, with a sense of vision revealing to him more than our 

 microscopes show to us, and with his minute eye-like ear-bag 

 scnsifying material movements that lie between our world of 

 sounds and our other far-distant worlds of heat and light. 



There is yet another indication of some sort of intermediate 

 sensation possessed by insects. Many of them are not only 

 endowed with the thousands of lenses of their compound eyes, 

 but have in addition several curious organs that have been 

 designated " ocelli " and " stemrnata." These are generally 

 placed at the top of the head, the thousand-fold eyes being at 

 the sides. They are very much like the auditory organs above 

 described so much so that in consulting different authorities 

 for special information on the subject I have fallen into some 

 confusion, from which I can only escape by supposing that the 

 organ which one anatomist describes as the ocelli of certain 

 insects is regarded as the auditory apparatus when examined 

 in another insect by another anatomist. All this indicates a 

 sort of continuity of sensation connecting the sounds of the 

 insect world with the objects of their vision. 



But these ocular ears or auditory eyes of the insect are not 

 his only advantage over us. He has another sensory organ to 

 which, with all our boasted intellect, we can claim nothing that 

 is comparable, unless it be our olfactory nerve. The possibil- 

 ity of this I will presently discuss. 



I refer to the antenna, which are the most characteristic of 

 insect organs, and wonderfully developed in some, as many be 

 seen by examining the plumes of the crested gnat. Every- 

 body who has carefully watched the doings of insects must 

 have observed the curiously investigative movements of the 

 antenna?, which are ever on the alert, peering and prying to 

 right and left and upward and downward. Huber, who 

 devoted his life to the study of bees and ants, concluded that 



