Sm. .1.CCOUNT OF EXPERIMENTS 



Ounces. 



4. The weight of a cul^ic incli of water, ...,..„„.,„„„.„,„.„.. ^ 7>=0.578S 



5. The area of a circle whose diameter is 1,. . ., .„.. 0=0.7854: 



Inches. 



6. The leng-tli of the composed pendulum of experimenls,..^^ /=39.698-l ^ 



,S6. If J, represents tlie diameter of tlie ball in inches, then, 



3 • ''•' ' "' ■■.■-• '- ■'■' -'• ■ 



!i a TjS . ■ ■ ' 



Hence by expounding the formula with the above data, we have 

 [ \^ /,--, ^'^i.Sp69.2;,and _l=r=0.G78456 



;.;,!' ^ ,; ; ■■^ , 2d. 



27. To find the distance from the aids of motion (from what pre* 

 cedes) to the centre of oscillation^ "dT vr 



As a thread may be considered as a cylinder, whose thickness ( physi- 

 cally speaking,) is infinitely small, Mr. FugereO gives us the follow- 

 ing elegant formula^ where L represents the simple pendulum isochroa^l 



to i. - V / . . 





28, Previous to expounding the formula, we are to correct the length 

 /; for the difference of temperature when the standard Jind mural ae^e 

 Mere constructed, ' 



29. It was found, by General Roy's experiments, that standard scale 

 brass will expand, for one degree of Faranheit, by 0.0001237- Now 

 the brass standard scale, sent from England to Major Lambton, was 



0) Lb Dentil,, Yolume JI. page Sd3> ... 



