L 297 J | 
N.B, I keep my tube fufpended 
fimply upon a brafs ring, foldered 
a little way within the brafs tube, 
which does very well. , 
Fig. VI. That part of the under- 
piece of the brafs fcale by which it 
is fupported upon the gingle. 
Fig. VII. The wooden-trough 
full of Water, in which the hens 
apparat tus is ufed. “This trough 
ought to be (in the infide) 2 feet 
long, 13 inches deep, and 17 inches 
wide. The board 4, upon which 
the jars, &c. are placed, ought to 
_ be fixed at the diftance of 33 inches 
from the brim; the length of the 
board ought to be about g inches, 
the thicknefS of it two inches. 
fhe trough ought to be kept full - 
of 
