| 31.93 | 11.81 | 377.07 | 1.1059 |
Methyl chloride (CH_{3}Cl) | 50.47 | 7.47 | 377.07 | 1.7482 |
Carbonyl chloride (COCl_{2}) | 98.93 | 3.81 | 377.07 | 3.4267 |
Phosphine gas (PH_{3}) | 33.96 | 11.10 | 377.07 | 1.1769 |
Hydrochloric acid (HCl) | 36.50 | 10.33 | 377.07 | 1.2642 |
Methane (CH_{4}) | 15.98 | 26.61 | 377.07 | 0.5531 |
Ethane (C_{2}H_{6}) | 29.94 | 12.50 | 377.07 | 1.0370 |
Propane (C_{3}H_{8}) | 43.91 | 8.58 | 377.07 | 1.5209 |
Butane (C_{4}H_{10}) | 57.88 | 6.51 | 377.07 | 2.0048 |
Ethene (C_{2}H_{4}) | 27.94 | 13.49 | 377.07 | 0.9677 |
Propene (C_{3}H_{6}) | 41.91 | 8.99 | 377.07 | 1.4516 |
Butene (C_{4}H_{8}) | 55.88 | 6.74 | 377.07 | 1.9355 |
Ethine (C_{2}H_{2}) | 25.94 | 14.53 | 377.07 | 0.8985 |
Propine (C_{3}H_{4}) | 39.91 | 9.44 | 377.07 | 1.3824 |
Butine (C_{4}H_{6}) | 53.88 | 6.98 | 377.07 | 1.8662 |
Quintone (C_{5}H_{6}) | 65.85 | 5.72 | 377.07 | 2.2809 |
Benzene (C_{6}H_{6}) | 77.82 | 4.84 | 377.07 | 2.6955 |
Styrolene (C_{8}H_{8}) | 103.75 | 3.63 | 377.07 | 3.5936 |
Naphtalene (C_{10}H_{8}) | 127.70 | 2.95 | 377.07 | 4.4232 |
Turpentine (C_{10}H_{16}) | 135.70 | 2.77 | 377.07 | 4.7003 |
Dry air | 28.87 | 13.06 | -- | 1.0000 |

* * * * *

EMERALD-GREEN: ITS PROPERTIES AND MANUFACTURE.[1]

[Footnote 1: This substance is also known by the name Schweinfurt green.]

By ROBERT GALLOWAY, M.R.I.A.

The poisonous effects of wall-paper stained with emerald-green
(aceto-arsenite of copper) appears to be a very favorite topic in many
journals; it is continually reappearing in one form or another in
different publications, especially medical ones; there has recently
appeared a short reference to it under the title, "The Poisonous Effect of
Wall-paper." As some years ago I became practically acquainted with its
properties and manufacture, a few observations on these subjects may not
be without interest.

In the paragraph referred to, it is stated that the poisonous effect of
this pigment cannot be _entirely_ due to its mere mechanical detachment
from the paper. This writer therefore attributes the poisonous effects to
the formation of the hydrogen compound of arsenic, viz., arseniureted
hydrogen (AsH_{3}); the hydrogen, for the format