1070 
formerly on the glass scale of the reading-arrangement. The liquid 
was contained in a vessel placed on a small table which was 
mounted on the stone pillar of the apparatus. 
The results of these observations are graphically represented in 
the adjoining figure. The three curves represented show, how in 
three different experiments the logarithm of the elongation diminished 
with the time. The ordinates represent loge a, and the abscissae the 
time expressed in the time of oscillation as unit; the direction-coef- 
ficient of the asymptote, also shown in the figure, gives the loga- 
rithmic decrement d with the opposite sign. The three curves have 
been shifted in such a manner as to make them intersect in one 
point corresponding to an amplitude of 0,01 radian. 
The three curves refer: 
I. to water at 10°,0 (aluminium cylinder + disc, K = 717, 
DP =223,42, T= 23,42, 9 = 04118); 
IL. to ‘benzene at 11°07 Kk 717 = 3s 2 0), 
Ill. to water at 10°,2 (without the aluminium cylinder, K = 544, 
Te 0d LO ee 095): 
All three bear the same character: with increasing elongation the 
logarithmic decrement first increases, then diminishes and finally 
increases again, in accordance with the sign of the coefficients a,, 
a, and a, (§ 3). *) 
1) On account of the small accuracy of the observations in the range from 
adm to «=0.1 an analysis of the curves similar to the one followed in § 4 
was not really possible. 
