62 



and oil tbe other side loug-handled pruniu^ shears. Thus equipped 

 the men drive all over the city and are at any time or place ready for 

 work at short notice. 



Our parks comprehend nearly 4,000 acres and are from one extreme 

 to the otber 16 miles apart. The work with the present force and ap- 

 pliances is chiefly centered in the island parks and places. 



Mr. Cook read a paper entitled : 



SOME HISTORIC NOTES. 



By A. J. Cook, Agricultural College, Michigan, 



Upon special request, I atn very pleased to state tlie following facts 

 regarding tbe early use of the kerosene emulsion and of the arsenites. 



I used kerosene and soap mixture, as 1 then called it, successfully iu 

 1877. I used very nearly the same proportions that I prefer now, heated 

 it to dissolve the soap, and I think made a permanent mixture. Br. C. 

 Y. Eiley argues that I only made a temporary mixture, which he says 

 was made years before, although I have been unable to find the record. 

 Whether it were an emulsion or not, it was very successfully used, as 

 successfully as iu later years. That I appreciated the importance of the 

 emulsion^ or even recognized it or produced it except as an accident, is 

 not true. Messrs. Barnard, Hubbard, and Eiley did this as the result 

 of extended experimentation, and heralded the facts forth to the world, 

 and I gladly accord to them the chief credit. 



As to Paris green, I believe my friend Hon. J. S. Woodward, of Lock- 

 port, N. Y., was the first to announce it as a specific against the Cod- 

 ling Moth, which he did in the autumn of 1878. He relates to me that 

 he advised a neighbor to use it to destroy the canker worms. The 

 neighbor observed that the trees treated were very free from Codling 

 Moth larvte, and Mr. Woodward divined the cause. I had a very simi- 

 lar experience the same year. Mr. J. W. Tafft, of Plymouth, Mich., 

 came to me in 1878 with specimens of canker worms, which he said were 

 destroying his orchard. I advised Paris green, which he used with the 

 same results that greeted Mr. Woodward's neighbor. Mr. David Allen 

 reported the fticts to me. I said, can it be possible that the poison has 

 worked this double benefit ? I will test the matter. Mr. Woodward 

 had already announced his belief in the matter. In 1879 I made the 

 first careful test and proved by a most crucial test that Paris green was 

 not only a specific against the insect but safe to use. The results of 

 these experiments were given at the Boston meeting of the American 

 Association for the Advancement of Science, August, 1879. The results 

 which I then secured were remarkable beyond what may usually be ex- 

 pected or hoped for. This was because I treated a small tree and took 

 special pains that every fruit should receive the poison. As great care 

 to-day will meet with the same success. Thus while Mr. Woodward 



