No. 4. 



REPORT OF STATE FORESTER. 



285 



five plots were made for the examinations, located in 39 areas 

 of stripping in 16 towns and the city of Boston. On 42 of these 

 plots the trees were counted by species in |^-acre circles; 8 were 

 in scrub growth, or not much larger; the others were taken wher- 

 ever conditions were favorable for getting comparative conditions 

 for a fair study. In every case an estimate was made of the per- 

 centage of stripping, by species. 



The table shows the average percentage of strippings of the 

 different species on the plots actually counted. 



Pekcentage of Stripping, 



Species. 



Basis 



(Number of 



Trees). 



White oak 



Red oak, .... 

 Black oak (including scarlet), 

 Chestnut, . . . . 

 Hickory, .... 

 Red maple, 

 Gray birch, 

 White birch. 

 Beech, .... 



Ash 



Black locust. 



White pine. 



Pitch pine, .... 



Red cedar 



Black birch, • . . . 



Elm.i 



Scrub oak, ' . . . 



871 



156 



,084 



39 



104 



67 



365 



4 



8 



31 



2 



127 



5 



43 



5« 



5« 



602 



1 Not on counted plots. 



2 Estimated. 



This gives a fair estimate of the comparative resistance to the 

 gypsy moth of the different species, with the exception of red 

 oak. It so happened that the greater number of trees of this 

 species observed were on areas where the stripping was particu- 

 larly heavy, while on the areas where the general stripping was 

 lighter there were very few red oaks. Thus the average obtained 

 is exceptionally large. The individual plots show that where red 



