yegetable Statich. in 
branch, as I have found by fixing the like 
gages to them in July. 
Experiment XXXIX. 
March lo, at the beginning of the bleed- 
ing feafon, (which is many days fooner or 
later, according to the coldncfs or warmth^ 
moifture or drynefs of the feafon) I then 
cut off a branch of a vine b fc g at (Fig. 
20.) which was 3 or 4 years old, and ce- 
mented faft on it a brafs - collar , with a 
ferew in it 5 to that I ferewed another brafs- 
collar, which was cemented faft to the glafs 
tnbcz , 7 feet long and 4 inch diam. (which 
I find to be the propereft diam.) to that 
I ferewed others, to 3 8 feet height. Thefc 
tubes were faftened and fecur d in long 
wooden tubes, 3 inches fquare, one fide of 
which was a door opening upon hinges 3 
the ufe of thofe wooden tubes was to pre- 
ferve the glafs tubes from being broke by 
the freezing of the fap in them in the 
night. But when the danger of hard frofts 
was pretty well over, as at the beginning of 
j^pril, then I ufually fixt the glafles with- 
out the wooden tubes, faftening them to 
2 fcaffold 
