_— 
316 Review of Prof. Johnson’s Report on American Coals. 
DATE. | Hour. 
Aug. 7 
WIAAM AE >= 
wowo.wr 
SSSR 8 
8 00 
A. M. 
Aug. 8} 5 20 
6 05 
TEMPERATURES OF THE 
iad bh 
° mle 
ae et pe 
2 = Ss 
2.) 85 
Ee] 8 tnd 
am 5 se 
Bs|s/e5 
Be Sale 
o 5 o 
s Lt 
oO 3 a 
nual a we 
80 "|76 | 150, 
81-577 | 154 
81 |77 | 158 
Vl ariVHCae bed 
82 |77 | 160 
82:5|77-5| 160 
84 |78 | 162 
84 |78 | 165 
85 |78 | 167 
87 179 | 169 
88 |79 | 189 
90 |80 | 186 
90 |g0 | 198 
91 |80:5| 208 
94 |80 | 224 
88 |78 | 225 
91:5|/79 | 235 
4 |80 | 249 
95 |80 | 253 
93 181 | 264 
92 181 | 275 
94 |81 | 288 
92 |81 | 296 
92 180 | 316 
90 |79 | 320 
96 92°} 343 
92 |g2 | 382 
80 77 | 236 
82 \77 | 214 
le 
as entering chimney. 
Water in tank. 
170; 80 
248, 80 
226) 80 
230; 80 
222) 78 
210) 78 
228, 84 
214 84 
206 84 
Steam in boiler. 
229 
225 
211 
Attached thermometer. 
81 
81 
Height of barometer. 
Height of manometer. 
FOREST IMPROVE- 
ter. 
Volumes of air in manome- 
— | —— | —— | | — 
KH MAMAN TT 
wwe Www ww 
Seessags ww 
(~) 
© 
or 
co 
_~ 
5:30 
Height of water in syphion. 
0:19 
0:18 
0:20 
0:16 
0-19 | 
0-18 
0°18 | 
0:18 | 
0-18 
0-18 
0-17 
0-18 
0-17 
0-18 
0°14 
0-15 
Weight of water in tank. 
Third trial—upper damper 4 inches open; air 
Weight of charges of coal. 
eeeee 
eo eee 
Period of steady action from 10h. 10m. a. M. to 5h. 30m. P. M.=7h. 20m., embracing 14 
sets of observations; coal supplied to grate, 551 lbs.; water to boiler, 4,204 lbs. ; water 
to 1 of coal, during said period, 7:629. 
