DENSITY OF GASES AT 32 DEGREES FAHRENHEIT AND ATMOSPHERIC PRESSURE
ADAPTED FROM SMITHSONIAN TABLES
+----------+----------+--------+---------+----------+---------------+
| | | | | | Relative |
| | | | Weight | | Density, |
| | | | of | Volume | Hydrogen = 1 |
| | |Specific|One Cubic| of +-------+-------+
| Gas | Chemical |Gravity | Foot |One Pound | |Approx-|
| | Symbol | Air=1 | Pounds |Cubic Feet| Exact | imate |
+----------+----------+--------+---------+----------+-------+-------+
|Oxygen | O | 1.053 | .08922 | 11.208 | 15.87 | 16 |
|Nitrogen | N | 0.9673 | .07829 | 12.773 | 13.92 | 14 |
|Hydrogen | H | 0.0696 | .005621 | 177.90 | 1.00 | 1 |
|Carbon | | | | | | |
| Dioxide | CO_{2} | 1.5291 | .12269 | 8.151 | 21.83 | 22 |
|Carbon | | | | | | |
| Monoxide | CO | 0.9672 | .07807 | 12.809 | 13.89 | 14 |
|Methane | CH_{4} | 0.5576 | .04470 | 22.371 | 7.95 | 8 |
|Ethane |C_{2}H_{6}| 1.075 | .08379 | 11.935 | 14.91 | 15 |
|Acetylene |C_{2}H_{2}| 0.920 | .07254 | 13.785 | 12.91 | 13 |
|Sulphur | | | | | | |
| Dioxide | SO_{2} | 2.2639 | .17862 | 5.598 | 31.96 | 32 |
|Air | ... | 1.0000 | .08071 | 12.390 | ... | ... |
+----------+----------+--------+---------+----------+-------+-------+
[Illustration: 1942 Horse-power Installation of Babcock & Wilcox Boilers
and Superheaters in the Singer Building, New York City]