Eesearchos on the Discharffe of the Electric Ortran. 



39 



progressive clianges. So, using e """ as a fatigue factor, in whicli 

 a' s were calculated from the checks, and finding the other 

 constants by laborious trials, the corresponding values of A were 

 calculated. These results an? given in the next tables (Plate XI., 

 Fig. :y:- 



Tai'.lk XV. 



Oscillograms No. -19, No. 60 and No. 01. (Plate XVIII.). 



Temperature of the oi'gan: 13-5 °C. g 



Referring to the accompanyiug figure, AF' 

 in No. 50, AC \\\ No. GO and AF' in No. (H 

 were taken for the stinuilati()n-l)readths. 



Fornuila usc<] in calculation: 



in No. oi), 7/ = '21 3x 10-<=-033'""[l — lo-3-o^c"('--)], 

 in No. 00, 7/ = 3-d xlö-°°^-i"[I — 10-°-™s^<'--;], 

 in No. (')], y = 38 s x 10-'-°"i^"[l -lO-"-"«-^^'--^]. 



No. ol). 



Fio-. 6. 



