166 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol, 2 



results which we have already attained in our work, but, owing to the 

 lack of time, will present the paper for publication in the proceedings. 



Mr. Sanderson : Mr. President, I certainly am glad to learn of this 

 investigation, because I have been interested in this matter for a long 

 while. We need information on the diffusability of these gases. I did 

 a little work on that some years ago, and I found that my friends who 

 were working in physical science had very little information on that 

 subject which was adaptable to our work, and I imagine there is very 

 little work in pure physics along this line. 



I am also interested in Doctor Hinds' presenting this outline to the 

 Association. It has been a feeling of mine for a good while that we 

 could save each other an enormous amount of work if we knew what 

 each was doing. I have had occasion many times to benefit immensely 

 by the plans submitted by other men. It seems to me that these meet- 

 ings would be much more profitable if we could have more plans offered 

 and short opportunities for discussing them. If time did not permit of 

 that, if each of us would give a brief outline of the projects under 

 way for the next year and the scope of the projects, it would be of im- 

 mense value in getting together those workers interested along the 

 same lines, so that by correspondence we could get our work in such 

 shape that it could be compared in different parts of the country. 



Mr. H. T. Fernald: Doctor Hinds' outline is very interesting to 

 me because for the past four years in my laboratory various students 

 have worked along similar lines, and the paper which I have withdrawn 

 from the program today w^as practically a summary of that work as 

 bearing on the treatment of certain greenhouse crops, — tomatoes and 

 cucumbers. We have found that humidity is a very important factor, 

 and, strange to say, so far as we have gone, we have found that with 

 tomatoes a rather high humidity was favorable to successful results, 

 while rather low humidity in the other case was preferable. 



We have found that the most advantageous treatment with hydro- 

 cyanic gas is influenced by the amount of light, even at night. Of 

 course, day-time experiments were unsuccessful. We also found that 

 moonlight night experiments were, in some cases, very dangerous, and 

 that the darkest nights gave the safest results. These results were to- 

 tally unexpected, but the experiments were carried far enough to show 

 that light entered into the subject. 



From the results of these four years' work I have gradually come 

 to the conclusion that there is no factor whatever that can enter into a 

 series of experiments which is too small to be ignored, and I would 

 urge Doctor Hinds and an}- one who is going into these experiments to 



