on Mosquito Extermination. 45 



carries out the theory, which I am sure is a fact, that the ano- 

 pheles travels only a very short distance and when you drain 

 any very considerable tract of land, there is practical immunity 

 from malaria. Mosquitoes coming from afar, while trouble- 

 some, are absolutely without danger to human health. 



Mr. Kerr: Just a word. Dr. Howard told me, some years 

 ago, to the best of his knowledge, they were sometimes blown 

 a long distance, but when they came to the end of their journey 

 they didn't amount to very much. 



Mr. E. L, DiCKERSON : In the last number of the "Science" 

 there was strong proof of the carrying powers of the Culex 

 Sollicitans. In all our investigations of the marsh mosquito we 

 found that they traveled a great distance. On the 28th of 

 July there were thousands coming out of the Jersey marshes 

 and these were found thirty or forty miles away. 



Mr. Scott: In my work this season, another matter came 

 to my attention, and that is that the anopheles breed in rain 

 barrels occasionally ; that has been overlooked very largely. It 

 is important to educate the public in all these things. I found 

 from a house to house investigation I made that at one time 

 we had a large influx ; this would last generally for a short time, 

 probably a few days. I went to the rear of one of these resi- 

 dences and I found a large water barrel, probably one-third 

 full of water. The lady of the house was on the front 

 stoop, who, upon inquiry, stated that the mosquitoes were 

 very numerous, and I had to take a great deal of abuse from 

 her before I was able to give her my opinion. She stated that 

 she didn't consider that oiling was of any benefit. I asked her 

 to go to the back of the house with me, and she finally did. I 

 said, my dear lady, you are supplying the mosquitoes yourself, 

 and I called her attention to the barrel. She stepped back and 

 said, are those mosquitoes? and I said, they certainly are. I 

 showed her our method of disposing of the mosquitoes, and 

 she promised to follow it. 



Chairman : Our Secretary will now read a letter from Prof. 

 Whitney. We had hoped that Prof. Whitney could be with 

 us, but instead we will have to hear his letter read. 



Mr. Weeks : Let me say something in anticipation of this 



