OBSERVATIONS FOR FINDING THE VOLUMES OF ^ AND <£. 
881 
K + L + (2) + (l) + 0-4830 grain 
P+Q+R 
14003*48359 
700*00197 
Apparent weight of CE in water 
Weight of air displaced by the weights 
14703*48556 
0*90948 
Weight of CE in water 
Weight of 
14702*57608 
15432*32653 
Weight of water at 15‘0 displaced by C 
Max. density of water: density of water at 15*0 
A pt. at 15*0 : A pt. at 0° 
729*75045 
2*8631744 
0*0003708 
9*9998241 
v(£ 
(£ 
730*078 
15432*32653 
2*8633693 
4*1884314 
A(!£ 
21*13791 
1*3250621 
The stereometer observations gave v(0=21‘l 19. Hence 1^91= 751’ 197. 
In 1845 the Committee received from Professor Schumacher an account in 
manuscript of fourteen newer and more accurate determinations of the density of 
and of several hundred measurements of its linear dimensions, together with a copy 
of Professor Steinheil’s paper entitled “Ueber das Bergkrystall-Kilogramm*,” con- 
taining numerous determinations of the linear dimensions of ^ by himself and Gambey 
in May 1837, in addition to those made byOnuFSEN in 1834. The linear dimensions 
of ^ and 91 were all measured with the same instrument, which was made by Gambey. 
Assuming the linear expansion of platinum to be 0’0000085655 for 1° C., 
=21*2037, by fourteen observations made February 3. ..24, 1837- (The value 
A^=21*2047 given in Steinheil’s memoir is the mean of four sets of observations 
of rather doubtful accuracy made in September 1831.) By the comparisons of ^ 
with 91, April 9... 14, 1835, ^=999*9993 grammes. Previous to February 9, 1837, ^ 
had lost about 1*6 milligramme, in consequence, as was supposed, of being washed 
with alcohol. In May 1837, therefore, its weight may be taken =999*998 grammes 
nearly. The volumes of ^ and 91 at 0°, deduced from their linear dimensions, 
appeared to be 47147 and 48650 cubic millimetres respectively. 
A^ 
v^{\n cubic millimetres) 

21*2037 
47147 
1*3264117 
4*6734541 
0*0000009 
(in cubic millimetres) 
48650 
5*9998667 
4*6870828 
A<B. 
S (in grains nearly) 
20*5487 
15432*35 
1*3127839 
4*1884321 
v'B. 
751*014 
2*8756482 
Hence the volume of 91 at 0° is equal to the volume of 751*014 grains, or 48*665 
grammes of water at its maximum density. 
The observations by which this value of was obtained are so numerous, and 
made with such extreme care, that I have no hesitation in adopting it in preference 
to the value 751*197 resulting from the observations made with the stereometer. 
The value ofi;91 just found depends upon A^; therefore, in computing z;9[—y(0, 
for reducing the weighings by which (0 is compared with 91, the density of (i5 must 
* Abhandlungen der K. Akademie der Wissenschaften zu Munchen, B. 4, S. 165. 
