HISTORY OF VERMONT. 91 



sand and seventy two grains. Upon examining, 

 the number and dimensions of the trees, v.hich 

 covered the ground where I made the experi- 

 ment, I think it would be a moderate computa- 

 tion, to estimate them as equal both in magni- 

 tude and extent, on every square rod, to four 

 such trees as that which I had examined. This 

 will give six hundred., and forty such trees, for 

 the (juantity of wood contained on one acre. 

 This estimation is less than the quantity of wood, 

 which is generally found upon one acre of land 

 in this part of America. The weight of one 

 pint of water, is one pound avoirdupoise, or 

 seven thousand grains, troy weight ; and eight 

 such pints make one gallon. Making the cal- 

 culation upon these principles, it will be found 

 that ftom one acre of land thus covered with 

 trees, three thousand eight Imndred and seventy 

 five gallons of water are throvv-n off and dispers- 

 ed in the atmosphere, in the space of twelve 

 hours. 



This computation, will not appear extrava- 

 gant to those, who have seen the great quantity 

 of juice, which naturally flows out of some of 

 our trees, vdien they are tapped in the spring. 

 A man much employed in making maple sugar^ 

 found that for twenty one days together, one of 

 the maple trees ^vhich he tended, discharged 

 seven gallons and an half each day. A ' large 

 birch which v»'as tapped in the spring, ran at the 

 rate of five gallons an hour^ wmen first tapped ; 

 eight or nine days after, it wafj found to run at 

 the rate of about two gallons and an half per 

 hour ; and at the end of fifteen days, the dis- 

 charge continued in nearly the same quantity. 



