20 



Result. 



Trees have shown no signs of injury from the paint which still ad- 

 heres to the bark. 



Experiment No. 2. 



Having fears of the danger of using Paris green and oil upon young 

 trees, in November of 1887 trees of all kinds were painted with lime 

 wash, glue and Paris green (1-2 lb. glue dissolved in hot water and 

 mixed with 10 qts. of lime wash and 1 table-spoonful of Paris green). 

 This was applied to many hundred trees. 



Result. 

 This mixture adhered well to the trees until after several rain storms 

 and some frost, when it scaled off rapidly so that before winter was over 

 it was entirely washed off. Upon trees so treated very few were girdled 

 although the deep snow has been favorable for the working of mice. 



Experiment No. 3. 

 To secure some paint that will not injure delicate trees, the following 

 mixtures were applied in April, 1888. 



Series No. I. 

 Lime wash of the consistency of common paint. 

 " "10 parts and gas tar 1 part. 

 " "10 parts and asphaltum 1 part. 

 " " 10 parts and Morrill's tree ink 1 part. 

 " " and skimmed milk equal parts. 

 " " skimmed milk (equal parts) and gas tar. 

 " " " " ( " " ) and asphaltum. 



" ( " " ) and Morrill's tree ink. 



Series No. 2. 

 Portland cement, of the consistency of common paint. 

 " " 10 parts, gas tar 1 part. 



" " 10 parts, asphaltum 1 part. 



" " 10 parts, Morrill's tree ink 1 part. 



'' " and skimmed milk equal parts. ^ 



" " " '•' " " " and gas tar 1 part. 



" " " " " " and asphaltum 1 part. 



" "' " " and Morrill's tree ink 1 



part. 

 The above was applied with a common paint brush. 



Results. 

 Although these have been upon the trees over two months, most of 

 them still adhere well. The skimmed milk was found to add but little to 

 their adhesiveness. 



