FOREST COMMISSIONER'S REPORT. 57 



Four thousand, one hundred and four trees per acre. 



This quarter acre was covered very thickly indeed. Most of the 

 trees were merely hoop poles. About four inches diameter by 

 thirty feet high is the maximum size of the trees 



Summary of growth on one-quarter acre of land in Township 

 No. 18, Washington county. Land burnt twenty-four years ago. 



Number Volume 



Species. trees. (estimated.) 



Whie birch.. 534 32.5 cu. ft. 



White maple 114 40 



Others including yellow and gray birch, rock 



maple, willow, beech, cherry and cedar. ... 58 15 



706 380 



Multiplying by four gives number of trees per acre, 2,824; 

 \'olume of growth, 1.520 cubic feet. 



Another quarter acre of same description. 



Number Estiuiatei.1 



Species. trees. volume. 



White birch 559 330 cu. ft. 



White maple 'J'7 30 



Others including gray and yellow birch, poplar, 



cherry, willow and spruce 134 20 



770 380 

 Multiplied by four 3,080 1,520 



These were picked quarter acres and show about the most that 

 ground will produce of this species. The close agreement of the 

 two pieces of land in number and volume of trees produced is from 

 this point of view very interesting. The height of the grove in each 

 case might be set at thirty feet, though, perhaps, a quarter of the 

 trees would over run that height. Very few trees in such thick 

 growth over ran four inches in diameter. The gray birches and 

 maples were distinctly smaller. 



An island of larger growth that by the grain of the trees was 

 judged to be thirty-five years old, contained some clear and thick 

 white birch growth in which an acre was staked out for study and 

 comparison. Following is a summary of the growth upon it: 



