Biography of Berzelius. 173 
water and so occurring as beforesaid at 40° F. Finally, the den- 
sities were interpolated from degree to degree between these 
epochs, according de a method which I have given in a former 
volume of this Journ 
The final results are given in the following 
Table of the Specific Gravities of Water at successive Temperatures of Fahrenheit's 
Thermometer. 
Temp. F. Specific Gravity. Temp. F, Specific Gravity. 
40° : 63 “ 0°9991 
41 9:9999997 64 099907382 
42 09999978 65 0°9989905 
43 0-9 48 66 9989 
44 09999860 f 67 09988147 
45 A 0:9999737 68 0:9987217 
46 i 09999579 69 0°9986252 
47 “ 09999385 10 i 09985253 
48 : 09999157 v1 = 09984219 
49 : 09998893 "2. z 099838149 
50 4 0:9998595 13 2 09982043 
51 0°9998262 44 : 09980901 
52 09 94 15 09979723 
53 09997491 16 09978510 
54 09997052 ues 09977263 
55 0-9996577 48 09975981 
56 09996067 19 09974665 
57 0°9995522 80 0°9973315 
58 09994949 81 0:9971929 
59 0°9994328 82 0°9970507 
60 099938680 83 0°9969049 
61 : 09992997 84 09967555 
62 F 0:9992278 85 ? 09966025 
Empirical Formula :— 
t° = observed temperature .* 
19 — 42° 
Sp. Gr. at ¢° = (69 + 35:15. 2° j° 42°) oe" 
Arr, XIX.—Biography of Berzelius; by Prof. H. Rose, 
of Berlin. 
(Continued from p. 15.) 
Previous to Berzelius, Dalton, in his new System of Chem- 
ical Philosophy, had attempted to express numerically the rela- 
tive quantities in which bodies generally combine, and by a 
means, as he regarded bodies as consisting of atoms, he 
establish as it were the relative weights of the ultimate ces. 
Thus originated the doctrine of the ed atomic weights. 
