ae 
and on the other side long- handled pruning 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 Suen 
‘to the other 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. Coox, Agricultural College, Michigan. 
Upon special request, I am very pleased to state the following facts 
regarding the early use of the kerosene emulsion and of the arsenites. 
I used kerosene and soap mixture, as I then called it, suecessfully in 
1877. Lused very nearly the same proportions that I prefer now, heated 
it to dissolve the soap, and I think made a permanent mixture. Dr. C. 
Y. Riley 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 in later years. That l appreciated the importance of the 
emulsion, or even recognized it or produced it except as an accident, is 
not true. Messrs. Barnard, Hubbard, and Riley did this as the result 
of extended experimentation, and heralded the facts forth to the world, 
and I gladly accord to them ihe chief credit. 
As to Paris green, I believe my friend Hon. J. 8S. Woodward, of Lock- 
port, N. Y., was the first to announce it as a specific against the Cod- 
Jing Moth, which he did in the autumn of 1878. He relates to me that 
he advised a neighbcr to use it to destroy the canker worms. The 
neighbor observed that the trees treated were very free from Codling 
Moth larve, 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 hisorchard. I advised Paris green, which he used with the 
same results that greeted Mr. Woodward’s neighbor. Mr. David Allen 
reported the facts 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 1579 IL 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 | 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 
weer 
PUA A bo 
