Is 
On the Production of Steam from heatrd Iron. 81 
RESULTS. 
t Series.—Vaporized % oz. of water in 2100’—viz. 
water wason the metal 1497” 
59 intervals 10.2” each tg 
Black at No. 19.—Minimum, No. 49. 
2d Series.—Gave % oz. of vapor in 1800’—viz 
water remained on 1292.5" 
61 pighe - 32” each 507.5” 
Black at No. 21.—Minimum, No. 50. 
3d Series.—Gave 4% oz, . vapor in 1800" —viz. 
1065.5 
water wail on 
67 intervals 10.9” each 734.5” 
Black at No. 19.—Minimum, No. 42. 
4th Series.—Gave 73 oz. of vapor in 1920’—viz. 
1092 
ea 
water was on 
72 intervals 11.5” each 828” 
- Black at No. 30.—Minimum, No. 29. (Surface oxidized.) 
h Series.—Gave *% oz. of vapor in 2100’—viz. 
water was 0 1244.5” 
79 intervals 10.8" each 855.5” 
Black at No. 31.—Minimum, No. 32. (Oxide.) 
6th Series.—_Gave *? oz. of vapor in 2100’—viz. 
1420’ 
water Si on 
91 intervals 7.47” each 680" 
Black at No. 30. —Minimum, No. 47. 
“th Series. oO S- OF, Of: vapor in 2162'—viz. 
wattr was on 
93 intervals 10” each 930” 
Black at No. 29. —Minimum, No. 52. 
8th Series.—Gave 143 oz. of vapor in 2700’—viz. 
Ud 
wate wan on 
162 intervals 5.44” each 881” 
Black at No. 38.—Minimum No. 52. 
oth Series, —Gave 3 oz. of vapor in 2700’—viz. 
0” 
The ej 
tion by th 
will r 
be wii, 
Most 
water Was on 151 
172 intervals 6. et ener Be: 
Black at No. 42.— 0. 75 
ighth series in the second course, is ee in projec- 
4 et (Fig. 4.) of the accompanying plate. ‘The reader 
the linear unit, assumed to represent the minimum 
its is eorresponing quantity of vapor, is one tenth of an inch 
ure, whereas it is two tenths in those which relate to the 
to the results of the fourth and fifth series, where the 
Tapid action Occurred almost simultaneously with the cessation 
No, 1. 
OL. II, 
