906 
the same way as described in the preceding $$ for the block of 
metal and core together. We only communicate the results of the 
measurements for the core Azz which served for the measurements 
of June/July 1914 (table Tl). 
§ 5. Lead. With lead (‘Kanipaum’’) 3 series of measurements 
were made. The results of the first two series (1913) have been 
united in table IV, that of the last series (1914) in table V. Weight 
of the lead block: for the measurements of table IV : 715,6 grammes, 
for those of table V (the same block after removal of a layer at 
the surface) 709.7 grammes. 
The measurements of 1914 must be considered as more accurate 
ints oy TABLE Wve at 
Atomic heat of lead 
Nal | Mean increase of nace | id. | en | 
temperature hbm block +ecorein, core C= È | 
Joules | |degree | | P Ol 
16 May 713 II 14.96° K. | 0.66 23.79 | 0.28 1.62 
Ill | 15.86 0.735 27.27 | 0.33 1.86 
Iv | 16.625 | 0.67 20.7 1 DN B 
v | 17.38 0.81 31.37 | 0.42 2.14 
VI | 18.19 | 0.735 33.85 0.49 2.30 
vi | 18.98 | 0,845 35.46 0.58 2.41 
VIII 19.81 0.805 37.20 0.69 2.52 
5 June ’13 I 15.00 0.735 24.73 0.29 | 1.69 
HM | 15.71 0.795 | 27.11 0.32 | 1.85 
III | 16.43 0.71 30.37 0.36 2.07 
| LV) \i 1%. 22 0.84 31.58 0.41 | 2.15 
| wo eae 0.78 34.73 | 0.49 | 2.36 
| VI 219 {10 0.95 36.68 0.59 | 2.49 | 
VII 20.105 0.95 | 3678 | 0.4 2.49 | 
temperature was not based on the determinations of the sensitivity (§ 2) immedi. 
ately before and after those measurements, as in this case irregularities appeared 
to have occurred which have not yet been explained, but on an average value of 
the sensitivity, which was deduced for a number of successive measurements to 
which these belong. Apart from these irregularities the individual values for the 
sensitivity im one series of measurements did not differ as a rule by more than 
2 to 4°/) (occasionally by 6 °/,). 
