( 239 ) 



By using formula {2Sn) instead of (11) we considerably simplify 



the calculations. In the tirst j)lace it becomes unnecessary to look up 



the sines of « and /?, while the tangents of these angles are already 



known, since they were wanted for the determination of crv. And 



3 



then it is not necessary to calculate the values of (1 -\- v"^)^. 



The data, serving for the detei-mination of the acceleration, have 



been collected in table. X. One also finds in the sixth column the 



TABLE X (string 10, Plate A 22). 



t 



in thou- 

 sandths 



of a 

 second. 



in 

 milli- 

 metres. 



i(/y. 



ifffi 



(H^-lgv. 



Difference 



between 



r c I) and tlie 



measured 



values of q 



in 

 millimetres. 



ixj^—lgrj 



ID 



millimetres. 



Algebraic 

 sum of the 



values 

 of the two 



preceding- 

 columns in 

 millimetres. 



1) i£ has been (•alculiited here by tlie foimula ^j = 2 y — |3, in whic'li y j'epre- 

 senls the angle of inclinalion of llie curve at the time ^=1. 



