15 



3'onng 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. 

 Eesult. 

 This mixture adhered well to the trees until after several rain 

 storms and some frost, when it scaled off rapidly so that before win- 

 ter 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 follow- 

 ing mixtures were applied in April, 1888. 

 Series No. 1. 

 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. 

 " " " L, ^^ ,i tt ■) j^j^(j asphaltum. 



'•'■ " " ti (^ n tt ) r^i^f] 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. 



Besults. 

 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. 



None of trees treated show any indications of injury from the 



The details of this experiment were can-led out by Mr. E. P. Felt of the Freshman class. 



