170 é REPORT—1845. 
in obtaining them by boring through the Front over the hearth of the fur- 
nace, and introducing an iron tube*. 
The gases collected over the zone of fusion were first examined, and gave 
the following results :— 
Experiment I. 
The depth of the tube was five feet below the upper stratum of fuel and 
materials. The gases issuing from the tube possessed a peculiar smell dif- 
ferent to that of coal-gas, but very similar to the characteristic odour of 
acrolein ; they burned with a yellowish red fame, and were not accompanied 
with brown vapours of tar. Number of charges, 6. 
A. Estimation of olefiant gas and carbonic acid. 
Volume, Pressure. Temp. | 1m, ato°Cc. 
(eas il Ramee HS EPR PPLE 1320 | 06558 | 120 | 82-93 
After absorption of olefiant gas 131°5 0°6550 11:8 82°57 
After absorption of carbonic acid ......... 1224 0°6471 11:0 76:13 
B. Examination of the gas freed from olefiant gas and carbonic acid. 
GES TISEL, |. coe cavncsheuntennts oansteaesie islenaes 125-2 0°4626 11:0 55°67 
After admission Of O  .......ssessecseeeeeees : 0°5452 11:3 107-74 
After combustion ...........+ Y 0:5168 111 89:20 
After absorption of CO, Y 0:4946 11:0 71:17 
After admission of H_ .. 0°6537 11:0 20209 
ALter GOMBUSHION: spircencascetassdereesevesyers Y 05172 11:0 89-29 
Nitrogen. «6 s 2 6 8 8 © 6 65585 
Carbonic acid « «6 8 «ee TT 
Carbonic oxide.) 5 sie 6) © 9 2597 
Light carburetted hydrogen . . 3°75 
Eivdvapens) sifie Hilweore vlna: FS 
Olefiant gabe. s 1 we ee O48 
100°00 
Experiment II. 
The depth of the tube was eight feet. The blast had been interrupted for a 
whole hour previous to the experiment, but the gases were not collected until 
the furnace had been for some time in tranquil action. The flame and smell 
were exactly the same as in the first experiment. Number of charges, 14. 
* We have already stated that the principal experiments on which our present inquiry is 
founded were instituted at Alfreton iron-works, the property of Mr. Oakes of Riddings House. 
The liberality with which this gentleman opened all his processes to our inspection, and the 
zeal with which he aided us in our inquiry, under circumstances of no ordinary difficulty, 
cannot be acknowledged by us with sufficient gratitude. A few short months however have 
deprived industry of a most scientific manufacturer and society of a most amiable man. Our 
acknowledgments that our success in the inquiry is mainly owing to the facilities which he 
offered to us must now fall upon the dead instead of upon the living; but we cannot refrain 
from expressing our thanks to his sons, who aided us materially in our experiments with 
their practical knowledge, and especially to Mr. C. Oakes, whose well-appointed laboratory 
and skill in chemical manipulation were placed at our disposal during our residence at Rid- 
dings House. 
