﻿Per 



cent. 



15.81 



15.92 



55.92 



54.08 



18.G0 



19.76 



9.67 



10.24 



100.00 



100.00 



(15.86) 



(15.86) 



35.48 



35.56 



34.42 



34.36 



14.24 



14.22 



48 cox. 



The analyses are as follows : 



By the official method: 

 Moisture 



Volatile combustible matter 

 Fixed carbon 

 Ash 



By the smoking-off jjrocess : 

 Moisture 



Volatile combustible matter 

 Fixed carbon 

 Ash 



100.00 100.00 



From the foregoing experiments it is possible to point ont the mechan- 

 ical losses. We will assume the ash obtained by the smoking-off process 

 to be correct, for in these determinations no escaping particles of solid 

 carbon were at any time visible. The averages of the analyses, studied 

 comparatively, are as follows: 



Sample I. 



By the smoking-off By the official 



process. method. 



Per cent. Per cent. 



Ash 4.11 3.79 



Fixed carbon 41.13 38.35 



4 11 41 13 



From these we get the ratios ,^=5 = 1.08 and ^^ = 1.07 which show 



that the variations in the percentage of ash and fixed carbon are ap- 

 proximately proportional. The ash content however is too small to be 

 an indicator of small differences. 



Sample II. 



By the smoking-off By the transition By the official 



process. method. method. 



Per cent. Per cent. Per cent. 



Ash 18.00 17.76 16.60 



Fixed carbon 31.75 31.39 26.24 



The first two columns give the ratios r^r, = 1.01 and ' on = 1.01 

 ° l/./b 31.39 



which show that the variations between the ash and fixed carbon in the two 



processes are exaetty proportional. The first and last columns give the 



18.00 .. nQ -, 31.75 -, f>1 TT xl _ x: __ _ „„ x n 



ratios r^— ^ = 1.08 and 



lb. bO 



proportional. 



Ash 



Fixed carbon 



26.24 ^- ~~" """ "*' 





Sample III. 





By the smoking-off 



By the official 



process. 



method. 



Per cent. 



Per cent. 



14.23 



9.95 



34.39 



19.18 



