196 



HENRY A. ROWLAND 



BISMUTH. 



Time of 

 swing. 



Axis, vertical 7'18 sec. 



Axis, horizontal 5'76 sec. 



CALC-SPAR. 



Half 

 length. 



Area of 

 section. 



8015cm. -0300cm. 50 30' 



Time of Moment of 

 swing. inertia. 



Axis, vertical 46'35sec. '0303cgs. 



Axis, horizontal 43-39 sec. '0300 cgs. 



The linear measurements were made with a dividing engine, the 

 moments of inertia were calculated from the dimensions of the bars. 

 The angle at which the calc-spar stood was measured by projecting the 

 linear axis on a scale placed at a distance. 



The above quantities being all determined and properly substitutedj 

 the solution of the equations gave for 



Bismuth , . .Tc, = 



Calc-spar 



000 000 012 554 

 000000014324 

 000 000 037 930 

 000000040330 



