5fc 
SHOUT NOTES ON PROFESSIONAL SUBJECTS. 
When the bird was figured in the first part of the late Earl of Derby’s * Knowsley 
Menagerie,’ its native country was unknown; and from that date, 1846, no other 
example had been recorded until Mr Blyth exhibited Col. L’Estrange’s specimen 
at the Meeting of the Zoological Society on the 8th May, 1867. 
“ ‘ Of this fine species,’ says Mr Blyth, 6 heretofore only known from a pair, 
male and female, in the Derby Museum, at Liverpool, which were said to have 
been brought from India, two examples were shot from a flock passing overhead 
in the vicinity of Massooree in unusually cold weather, one of which was given to 
Col. L’Estrange, of the Royal Artillery, who kindly submitted the specimen to my 
inspection. At the present time so fine a species is quite an unexpected addition 
to the list of Indian game-birds.’ ” 
45. Resistance of Air. The results of some late experiments‘ carried out 
by Capt. W. IT. Noble, R.A., under the direction of the O.S. Committee, in which 
the velocity of spherical projectiles was observed at two distances, have shewn that 
the resistance of the air to these projectiles varies very nearly as the cube of the 
velocity, as adopted by the Erench School, and that the following simple formula 
may be used in determining remaining velocities of all projectiles, viz.— 
V 
V ~l + cVx 
where 
v = remaining velocity in feet, 
x — horizontal distance in feet, 
V — initial velocity in feet, 
R = radius of shot in feet. 
W — weight of shot in lbs. 
b — O'000081 for spherical projectiles, 
b = 0*000063 for elongated projectiles of the usual service forms. 
46. Calculation or Ranges. The following formula has been employed 
for the calculation of ranges of either spherical or elongated projectiles, viz.— 
in which 
in which 
X = 
1 + ZAV* 
2 sin 2<£ 
9 
X = horizontal range in feet, 
V = initial velocity in feet, 
g = force of gravity (32*1908), 
4 > = angle of elevation, 
V — initial velocity, 
z = coefficient depending on the velocity, 
b = coefficient depending on the form of the projectile, 
R — radius of projectile in feet, 
W weight of projectile in lbs. 
