SUN 



77o&>, Bernonilli makes the expansive force of gunpowder equal to 

 10,000 atmospheres ; Rumford, from the bursting of a barrel of iron, 

 50,000, from some more direct experiments from 20,000 to 40,000. The 

 utmost that can be justly inferred from the bursting of the barrel is in 

 reality about 30,000, since the tension could by no means be equal througlQ 

 every part of its substance. ( Young's Nat. Philj 



STEELYARD. See Lever. 

 STILE new. See Calendar. 

 STRENGTH animal See Animal strength. 

 SUBNORMAL, formula for. 



Let x and y abscissa and ordinate of any curve j then 



Subnormal = ~~. 

 dx 



Vd-iS-f <??/* 

 and normal^ 3, x j~ 



Ex. Let the curve be the common parabola, then subnormal = -^, and 

 normal = /s/7/2-|__ ~, where L = lat. reck 



SUBTANGENT. See Tangent. 



SUN eclipses of. See Eclipse. 



SUN elements of. See Planets elements rf. 



SUN, table of mean right ascension of. See Time, 



SUN, time of passing Meridian. See Time. 



271 



