( 248) 



Fig. 5. 



String N". U, photogram A 125, Tables XIII and XlV. 

 Absciss 1 scale division =23-, ordinate 1 scale division =8,67X10~9 Amp. 



7. Ahsoliite measures of the mass of the string and the 

 ' resistance to the motion of the string. 



As soon as m, the ^'i^(ual mass of the image of the string is 

 known in millimetre-niicrampere units, it is not difficult to calcnlate 

 (he real mass of the string in grammes. In order to do this we 

 must first in formula (7) express the values of T and c in the 

 ordinary units of the (C.G.S.)-sjstem and then the circumstance has 

 lo be taken into account that although the middle of the string and 

 consequently the image of the string performs rectilinear oscillations^ 



