438 



for another, from which we deduce 



(p'-/')30 



m zz 



(t-t'Xp-fO-^-OCp-/') 

 " The subjoined tables contain the experiments ; and ap- 

 plying to them the method of calculation just explained, we 

 obtain eleven values o£ m. 



Series 1. 



Table 1. 



Table 2. 



Table 3. 



Table 4. 



)1 &2 

 VI &3 

 )2&3 



m 



•0118 

 •0121 

 •OHO 



1 & 2 . m= -0144 



1 &2. m=z -0117 

 1 &3 -0122 



1 &4 -0132 



2 & 3 -0035 



2 &4 -0103 



3&4 -0109 



|l &2. m= -0106 



Mean value of wi nz -01 151 



** 2, In the general formula given above, if/'' =^ 0, 

 /' 30 



My observations of I and I' in dry 



