Notes on the Quality of Hartley and 



At IL ISm. the station meter indicated 5,587,420 feet. 

 At the commencement ... ... 5,586,294 „ 



1,126 „ 



A reference to the above times and quantities will show, 

 that the first 1 00 feet of gas was given off in seven minutes 

 from the time of closing second retort, or nine minutes and 

 twenty seconds from commencement of charging the first 

 retort. 



:he 



: second in 





9| minutes. 





third 



» 



10 



55 





fourth 



)j 



10 



55 





fifth 



5) 



101 



15 





sixth 



55 



Hi 



55 





seventh 



55 



121 



55 





eighth 



55 



13 



55 





ninth 



55 



13 



55 





tenth 



55 



19 



55 





eleventh 



55 



24 



55 





twelvth -26 



J5 



23 



55 





1126 feet 





165m. 



20s. = 2h. 451m. 



thus showing the total quantity of gas made from 2241bs. 

 of shale to be 1126 cubic feet, or at the rate of 11,260 feet 

 per ton. 



The retorts were at a fair average heat and burned out or 

 exhausted the charge in 2h. 45| mins. 



In making this experiment I had intended taking the 

 illuminating power of the gas as it was produced, but on 

 account of the light from the burner consuming five feet per 

 hour, being abnormally large and above the power of my 

 photometer to register, I lost a few minutes in procuring a 

 small burner : this, to a certain extent, destroyed the 

 accuracy of the experiment ; and although I continued 

 taking the quality of the gas, I thought it advisable to set 

 aside the results, which were on the whole slightly in excess 

 of those subsequently obtained (the actual difference being 

 as 51-53 is to 51-51.) 



I then commenced the second experiment, with the same 

 quantity of shale — ^viz., 224 lbs,, with which I charged three 

 clay retorts — 



Betort. 



Commenced at. 





Finislied.. 



Time Occupied. 





h. m. s. 



h. 



m. s. 





1st 



. 1 19 p.m. 



1 



19 83 p.m. 



33 seconds. 



2ncl 



. 1 19 40 „ 



1 



20 20 „ 



40 „ 



3rd 



. 1 20 22 „ 



1 



21 10 „ 



48 „ 



