¥8i5.] Gaseous Bodies and the Weight of their Atoms. . 329 
TABLE 1V.—Substances stated from Analogy, lut of which we 
are yet uncertain. 
: c 8h 
a = oO es 
> an ca 
bn ” Fa 
= in * wk 
S sia Be 
i Boas Sey 
Name, ae {ERIE oe 
= |Z s| sc 58 Observations. 
NAL ies ial aap 
sd . LO 
elosi se] =o 
we) a Lo (a 
po ~= —~ 2 RM 
n \= = = 
Aluminum ....| 8 § 10 10°68! Berzelius. 
19)" TE° | 1463 Henry. Berzelius makes it 15°77. 
Berzelius, : 
Ditto. 
1 
Magnesium .... ‘i 
3 
4 
28 | 28 35 36:65 |5 Rolheff. 
6 
7 
8 
9 
Chromium .... 
Wakeli.cxi---.- 
ors S| | re 
Tellurium...... Berzelius. 
Copper.....-..| 92 | 32) 40 407 As deduced by Dr. Thomson, 
Strontium......| 48 | 48 |) 60 | 59° Klaproth. 
Arsenic........ 48 | 48 | 60 | 609 Berzelius. 
Molybdenum ..| 45 | 48 | 60 60:13 1°)! Bucholz and Berzelius, 
Manganese ....| 56 | 56) 70 F115" |" Berzelius. 
BRR ie cocctes =. -h 60.,)°60,| «7 73:522 .28 sDifto. 
Bismuth ...... 72|72| 90 | 89°9413)!3 Pitto. 
Antimony.....- 88 | 88 | 110 jIi1-11 * 44 {Jitto, Dr. Thomson makes it 112-49, 
Cerium ;......-| 92 | 92.) 115 |114°87 45» Hisinger. 
Uranium ......| 96 | 96 |.120 {120% | P® Bucholz. 
Tungsten ...-.- 96 | 96 | 120 |i21:21 7/7 Berzelius, 
Platinum .....- 96 | 96 | 120 |121-66 8)" Ditto. 
Mercury ....-. 100 j100 | 125 {12519 — 9 Fourcroy and Thenard. 
Lead ......- a -\104 )104 | 130 j129°5 7° |?° Berzelius. 
Silver.........- 108 }108 | 135 |1352% |? Wenzel and Davy. 
Rhodium ......120 |120 | 150 |149°03 2}? Berzelius. 
Titanium ......\144 |144 | 180 [18071 2 Ditto. 
Gold ..........'200 |200 | 250 '249°68 2+ |* Ditto. 
Observations. 
Table I.—This, as well as the other tables, will be easily ‘under- 
stood. In the first column we have the specific gravities of the 
different substances in a gaseous state, hydrogen being 1: and if 
we suppose the volume to be 47°21485 cubie inches, the numbers 
will at the same time represent the number of grains which this 
- quantity of each gas will weigh. In the third column are the cor- 
rected numbers, the atom of oxygen being supposed, according to 
Dr. Thomson, Dr. Wollaston, &c. te be 10: and in the fourth, 
the same, as obtained by experiment, are stated, to show how 
nearly they coincide. Of the individual substances mentioned, I 
have no remark to make, except with respect to iodine. | made but 
one experiment to ascertain the weight of the atom of this sub- 
stance, and therefore the results stated may be justly considered as 
deserving but little confidence ; and indeed this would be the case, 
did not all the experiments of Gay-Lussac nearly coincide in the 
same, . 
