[ *7 ] 
A Defcription of the Figures in TAB. I. 
Fig. I. 
aaaa. The Hygrometer feen in the Iniide. 
bb. The Balance. 
c . A fmall Piece ofWood, by which the Balance 
is fattened to the Box. 
d. The Sponge. 
e. The Weight. 
ff Two little Rings, by which the Hygrometer 
is hung up. 
Fig. 2. 
The graduated Plate on the Front of the Machine, 
with its Index and 'Divijions. 
Fig. 3. The Anemofcope. 
a. The Pedeftal. 
b. The Pillar, in which the iron Axis is fitted. 
c . The Circle of Wood, on which art deferibed 
the 3 2 Points of the Compafs. 
d. The Index. 
e. The wooden Tube upon its Axis. 
f The Velum. 
g. The graduated Quadrant. 
h. The Countcrpoife of the Vane. 
Fig. 4. The Velum taken off. 
a. The Plane of the Velum. 
b. The Spring. 
cc. The wooden Radii. 
C 
dd. The 
