TRAJECTORIES of 12 PF ARMSTRONG CUN NI9 224 FIRED WITH SERVICE CHARGES. 
I'i-’orn Experiments made Sept? 10^' & 15V 1 I860 . 
Mean of 6 rounds . Seal# of Abscissa# SO beet to an, inch . 
Initial. Wodty 7137-5 feet/ per second/. Ordinates 10 times th/d, of Abscissa . 
A ufte of departure- O-Zo'-Ad ■ 
Range- 338 Ted . . , 
Gun/ lead Eoint- Blank,, Angle/ of Elevation. It. 0 
Height- rf Aaas of Gun, 4-2.5 feel. 
Note. Blac/r- fines skew observed part,- of By/eetile. 
Blue- tines shew path- in, varan. 
Red fines shnv path calculated- on the- assumption, of the 
resistance- rftbe air-O0OSZ73 n A v * f/e-rrfmj 
Mean of 5 roil mis . 
Initial Velocity 1779-8 fed. per second. 
Aru/le of defeature 0 - 7.5 -55“ 
rtimt/c 897 feet. 
Gan laid/ 7bmt, /Hank , Angle of Elevation, 0 0 
Help ft of Axis of Gun 4-2.5 feet. 
Day i t/w fottet. 
