the Refinance of the Air . 
table. 
Machine alone 
With a parallelogram of nine inches long 
and four broad, one of its longeft fides, 
parallel to the horizon and the parallelo- 
gram, inclined to an angle of 45 0 , 
Ditto, with one of its fhorted: Tides down- 
wards, - 
With a lozenge nine inches long and four 
broad, with its longed: fide parallel to 
the horizon, - - 
Ditto reverfed, - - 
With a fquare piece of tin, four inches by 
four inches, - - 
Ditto, eight inches by eight inches, 
With the former parallelogram, placed 
with one of its diorted: fides downwards, 
inclined to an angle of 45 0 , and bent 
into an arch whofe chord was eight 
inches long, - - 
Ditto bent to an arch, the chord of whicli 
was feven inches and a quarter, 
Turns. 
5 
5 
5 
5 
5 
Time. 
4 
4 
4 
4 
4 
4 
4 
*43 
Weight. 
2 8 
7 ° 
7 * 9 
5 8 
6 o 
5 o 
16 6 
8 o 
« if 
4 
