118
NEW EXPERIMENTS
TRACT 3'1,
158.
Oct. 28. The 8-inchMortar.
The Charge 24 oz.
Nov. 10. The 8-inchMortar ,
Charge 32oz. Ele-vation 45°.
Nov. 10. 3 -lbGun.
Elevation 75°.
N°
rfiV-va
Fall
Range
N°
Range
N o
Powder
Range
yards
yards
OZ
yards
1
35°
53°
1900
i
1920
1
8
1920
2
35
51
2200
2
2020
2
8
2050
3
55
611-
1700
3
2120
3
16
1890
4
1960
4
2070
5
2120
5
1270
6
1930
6
24
1870
7
2070
2300
8
2080
8
1740
THE PENDULUM EXPERIMENTS RESUMED.
159. Nov. 14, 1789.
A second new pendulum having been prepared, it was thisday weighed, measured, balanced, &c, as below.
Dimensions: length 50| inches, breadth 18^, depth 23f.Its weigiit i748ib; its centre of gravity on the first end at791, at the second end 79'3. When hung up, and oscillated,it vibrated 397 in 10 minutes ; which gives n=z 39’7.
160. November 16.
Barometer 29'4; Thermometer 51.
The following balls were discharged at the pendulum,from different distances, for the resistance, of the air, thefirst 10 from the long 6-pounder gun, the latter 7 from a4 -pounder ; the former with our usual powder, 2 qz of whichgave a medium of 361- on my eprouvettc; and the latter 7with a stronger powder, which gave a medium of 38-§- onthe same eprouvette, as here below.