190 Major J. G. Barnard on Elongated Projectiles, 
motion; he looks at the heavens, and there sees these answers, 
illustrated in the orbits of celestial bodies. The zodlogist, mark 
ing the changes of the embryo, thinks of these changes ass 
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many different animals; deep in the rocks he finds all stagesol 
this embryo, each represented by a species, perfect in its kintl 
On the other hand, how dead -the science, that puts “force” — 
as its first cause! What is this force that makes the star-fish 
and the oyster, the medusa and the cuttle-fish, the crab and the 
whale, the tufted sea worm and the shark, each in its kind, and 
each telling its own story of manifold relations with animal cre 
ation, that is, that has been, and that is to come? Nature is no 
such simple thing that she should be dictated to by light, or 
heat, or electricity. These are her servants, not her | 
Boston, Nov., 1859. 
Art. XVII—On the causes of deviation in Elongated jectiles 5 
by Maj. J. G. Barnarp, Corps of Engineers, U.S. A. 
THE various and somewhat conflicting explanations given of 
the deviation of projectiles, both spherical and elongated, aigae 
from their own rotary motions, leave room for a few addito 
words on this subject. ; Jastd 
the plane surface ab moves, in an on ; 
es medium in the direction of its normal, W re 
a:? velocity AB, that medium will oppose 4 sik 
: to which we apply the term ‘resistance 
which is measured by a function of the 
ge city A B. } oi 
’ ty of 
< 
point of the surface, represented by the diagonal ae ee 
velocity V. 
the character and intensity of the impact of the sphere 
the atmo — 
— AOE (except through the agency of jen erefore 
If we leave out of consideration the cee with the | 
