GUNNERY. 
which er make up the ratio of 1 to pti the fub- 
hme which is the ratio of 1 to and in this 
ratio is the os le sk the —_ would: acquire ae 
pa ugh a {pa ° 
empl the hats veil baat bore: the 1m of the powder, 
iss Ww "carry it nearl 
y 
at 15g ae > bf cra eet in 1” of time ; pier et: the velocity, 
to which this has the ratio of 
would c carry the ball at the 
if ee eres 
I tO IIo. 7 isa hae se 
rate of 
ewetieds in 
c ae the weight 
ao will vary in the peo ponents -of the 
ameter ; Saar the Fig s directly as the 
' aad reciprocally as 
“proportion of the diameter ; 
iamet F, the height © 
a the e ae xe behind pe bullet, be pare om or diminifhed, 
the reCtangle. = aan oni confe eque 
will be dire&ly 2 as the bogie, AP Bipatisg AB repre- 
fents the length of the barrel, and y F the len th of the 
ro) 
“the dia- 
ety oe, Hikewile dire&ly 
° bu 
uA a height of the cavity left behind the bullet. Con- 
: Te velocity being computed above, for a bullet of 
a Cae by means 
Mame of any a bullet may be thence 
umftance Fits pofion, quantity, 
iven. » that in the i me 
° 
ove fpecified 
ee. © flowing at eter ¢ aA 6 
eee aly he cit oF the charge af 
at 7 of the =< ight the the bore, ¢ the 
sty ‘ , dtl “Re . , 
f powder is 
occupying a quires a 
Y exp 
11345 oz. for a ball of lead, and J = $inch: then » = 
27130 Vee x log» ——— 
city a fhe ball, ie sahond,. ye ee weight of the 
bullet ep ee Then v = 
ie 1674 feet, the a 
OZ. 
11g X- 189 ec 
5 2» Re 2 x log. = —_ = 1674 feet, as before. 
the firft of the principles here affumed, the author 
has pe tie (fee: alfo 
p- 164, &c.) that it would be found erroneous, if examined 
witha Pyeratiriesl rigour ; i hi 
the flame aéts in fome degree oa the bullet after it is out of is 
piece : 
as gunpow experi- 
that the volaviites of Sollee fired be! the 
charged with the fame powder, and all 6 
circumftances as nearly as poflible the fame, do yet differ 
from each other by fometimes more than - the 
whole ; but this is a {mall degree of inaccuracy in ina cafe of 
this nature, and if the action of the eo 
it is out of the piece, greater 
effet aan what m at he deftroy: ‘a by the inevitable varia~ 
AEE may y aflomed, is the con idee tion of the 
{preading of the by its own elatticity, as Praise! 
y Soares from the mouth of the piece ; for by this it may 
be conceived that ee 5 of it which i impin iy on the bullet 
hough the impulfe- ‘oe the flame be a 
may be neglect ete 
very remarkable f 
With ones to ae oeend eg ffumed principle, that all 
fired before the bullet is fenfibly Bh mr toed 
its place, it is to be obferved, that this very pofition, 
ving been examined by a a of the R 
ciety, was, _— pa experiment 
pa ‘hele 
farther 
this principle be not ae true. than the 
former, yet it feems alfo that - Fo oe i coos 
in inveftigating the effeéts o 
fhert barrels, where the re he Salles ws pitas ed 
through was not five inches, and where of e the 
velocity was severe » it cannot amount 
deficie ency amount te 
one siepet of at ine Wiles 
will anreae fm ‘the 
made by the committee ; _ for when the } 
sao ereapes that the bullet, 
e ie wad, la 
nearly level wit 
ricco even in this fhort tranfit of 
/ 
