PHILOSOPHICAL 
TRANSACTIONS. 
XIV. An account of experiments to determine the acceleration of 
the Pendulum in different latitudes. By Captain Edward 
Sabine, of the Royal Regiment of Artillery , F. R. S. and 
F. L. S. 
Read March 8, 1821. 
The clocks and pendulums used in these experiments are 
the property of the Royal Society, and were prepared by 
their direction under the immediate superintendance of Cap- 
tain Kater ; who, in a manuscript account presented to the 
Society, of the instruments furnished to the Expeditions on 
Northern discovery, has described them as follows : 
“ The clocks were made by Shelton, and are the same 
which accompanied Captain Cook round the world : for each 
clock a pendulum was cast in one piece of solid brass : this 
was furnished with a knife edge of hard steel perfectly strait, 
and finished by drawing the edge longitudinally two or three 
times on a soft hone, so as to take from its sharpness, and 
thus preclude any alteration from wear ; the back of the 
knife edge bore firmly against a stout cross piece, and the 
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