Handbook of Railroad Construction; For the use of American engineers. / Containing the necessary rules, tables, and formulæ for the location, construction, equipment, and management of railroads, as built in the United States.

by George L. Vose

373. Table 8. Giving the volume, pressure, temperature, and density of steam.

Steam pressure.	Relative volume or cubic feet of steam, water being 1.	Temperature.	Total heat.	Weight of a cubic foot.	Steam pressure.
50	552	281	1200	1129	50
60	467	293	1203	1335	60
65	434	298	1205	1436	65
70	406	303	1206	1535	70
75	381	307	1208	1636	75
80	359	312	1209	1736	80
90	323	320	1212	1929	90
100	293	328	1214	2127	100
110	269	335	1216	2317	110
120	249	341	1218	2505	120
130	231	347	1220	2698	130
140	216	353	1221	2885	140
150	203	358	1223	3070	150

FORMULA.

S =√ac × 21.2.

Where S = surface.

a = grate area.

c = cubic feet of water per hour.

Example.

Grate area sixteen square feet, cubic feet of water per hour two hundred, surface is

√16 × 200 × 21.2 = 1199.92.