312. On the Rapid Production of Steam. 
FIFTH SERIES, - 
With hollow cylinders of copper, presenting 149 square inches of 
_ generating surface—water kept at 212°. 
wh as — [Sou] 2g 
a ~~ + — 3 
ny eee . 1 
S| e218, 2 38 .lg8s| as |]. a 
3 ‘S Es 2 SB Be % 9 Heat observed. Remarks. | | 
. Sta | aie ©: Ta - : : 
| 28 |£| £2 [28] 33. 
is| Ss |B15 [83% ES 
: Bole a°s| os Se eee | 
-1/158.50/75| 9.875].0636|16.050) - ee ssa 
2)158.25/50110.5 0663 115.071 i? 
a ME mt dtc but 4 
3l157. |70l12.25 |.0780|12.816 eddieh nda ight ay 
4|159. |70/13.5 |.0S46/11. | es 
5|159.25/73/14.25 |.0895/11.175 Cotspsivetle dull red. ge 
[ . : ‘ 4 Immersed 
6159. |45114.25 |.0896/11.158 Do. po 
7158. |55|14.5  |.0911|10.896 De.” ae 
8]156.75/66/14.5 |.0925|10.810| Do. | 
9}158.75|75|14.75 |.0929|10.762 Dee. a 
{10|159.75|/75/15.. _ |.0939|10.650} Clear red. 
11}157.5 |65/15.25. |.0967|10.327 Do. ee 
12|157.75/70/17.25 |.1093] 9.145 Bright red. y 
The mean amount of metal to the ounce of steam in ‘the five 6X- 
“ periments marked comparable in the above table, is 10 2,5, ounces, 
. which may <4 assumed as 11 without sensible error. 
ke SIXTH SERIES, 
"To determine the efiantity of steam yielded by given weights of cast 
: brass at red heat, when plunged into water at 212°. 
i re oe 
q 2 3 £0) 
El= 8| 8 go \8s | Ge 
= ° 5 3 ae = ne 3 © Heat observed. ~ Remarks. 
® |e &2| 32 
5/2 & le Be 8 oe 
4/e |e Mls a a Sees, | 
1|176| 70 0895]11.809 en only in. Tmmersed at once: 
21/176/120/16.5 |.0943/10.666 “ia Fe) Do. by degrees. 
3)175| 60)16.75|.0958) 10.448 Do. at once. 
4:176)105/17. |.0966/10:353) -, Do. more gradually. 
5/179 | 120) 1'7.25).0985)10.145 Do. Do. slowly: 
6\175 \120)17.25 5'10.145 Do. 0. . 
7175 |180})18. |.1028} 9.722! Clear red. Do. Do. 
8/176) 75|19.  |.1085| 9.263} Full red. Do. at once- 
9 P/O | 120/22. .1250 8.000! Bright red. Do. gradually. 
‘ iy 
