(140) 
Date. _ Time. Volume. ae Product. Deviation. 
4 April. 4.10 174.265 74.071 12908 .0 — 1.2 
nn 4.25 „258 „079 08.8 — 0.4 
hy id 4.10 14 | .138 10.6 + 1.4 
ow 4.25 „128 ‚128 07.8 — 1.4 
re: 4.53 „121 | „142 09.7 + 0.5 
nm oD 5.07 118 151 11.0 +18 
og 4.25 „030 „182 09.8 + 0.6 
rn 4.39 „027 174 08.3 — 0.9 
PAD 4.53 „026 „176 08.5 — 0.7 
Dn 5.17 „024 „172 07.7 — 1.5 
Ys 3.29 O16 A81 08.6 =H8 
nm 0 3.47 „019 194 11.2 + 2.0 
ras 4.02 ‚019 196 11.6 + 2.4 
Oy 4.33 „019 „182 09.0 — 0.2 
9 + 3.29 „107 „149 09.8 + 0.6 
cee 3.50 „106 „140 08.2 — 1.0 
„mn 4.20 107 „140 08.3 — 0.9 
The last column headed “Deviation” gives the difference between 
the mean value and the observed value; from it we calculate the 
mean error 1.22 which is of the value. 
1 
10.000 
In order to derive the normal volume from the value found I 
assumed that for the reduction of about 74 e.m. to 75,9467 c.m. 
(the height of the mercury at Leiden for 1 atm. at 45° northern 
latitude while the constant of gravitation at Leiden is taken as 
981.318 1) and at 45° northern latitude as 980.63°) BovLe's law 
was sufficient (the deviation is of the order of while I have 
EE 
50.000 
taken « =0.0036613 for the co-efficient of expansion. 
1) Derrorces and Boureeois 1892. 
2) Also accepted in GurLuaume’s „Thermométrie,” 
