. the Trials of Portable Steam-Eiigines at Cardiff. 87 
" It will be noticed that the sulphur in this coal is low, but 
that the ash is rather hi^h. It yields but little ' tar,' and a 
moderate quantity of ' gas ' by distillation. 
" I am, dear Sir, 
"Yours obediently, 
(Signed) " Geo. J. Snelus, A.R.S.M." 
Ultimate Analysis of Coals, with their Theoretical and 
Actual Value. 
i 
d . 
Class of Coal. 
d 
to 
c 
5 
a 
|| 
il Di 
of 
porat 
of Coi 
o 
o 
S3 
C. 
"a 
u> 
►? 
.S 
o 
SS 
■3 >^ 
ctuf 
tail 
lbs. 
ova 
lb. 
03 
O 
< 
O 
o 
<! 
Ebbw Yale 1848 
87-78 
- 1- 
0 Ic) 
2 
16 
1-02 
-30 
1-50 
77-5 
9011* 
10-21 
Powell's Duffryn 1848 
88-26 
4-G6 
1 
-45 
1-77 
-6 
3-26 
84-2 
8731 
10-15 
Llangennccli 1848 
85-46 
4-20 
1 
07 
-29 
2-44 
G-54 
83-69 
8237 
8-86 
Llangennoch 1871 
84-97 
4-26 
1 
45 
•42 
3-50 
5^40 
86-7 
8177 
Giaigola 1848 
84-87 
3-84 
•41 
•45 
7-19 
1-50 
85-5 
7867 
9-35 
In his letter to the Consulting Engineers enclosing Mr. Snelus's 
Report, Mr. Menelaus says : — 
" The ' Ebbw Vale coal ' may be taken to represent the Mon- 
mouthshire steam coals, and 'Powell's Duffryn' represents the 
Merthyr and Aberdare coals, which are so highly esteemed for 
locomotives and ocean steamers. 
"The 'Ebbw Vale coal,' as you will see, is equal in calorific 
value to ' Powell's Duffryn,' or is perhaps even a little superior, 
but the Merthyr coals have the great merit of being smokeless. 
"The Llangennech coal may be considered a very good steam 
coal, inferior to the best Welsh, but considerably above the 
average steam coals of England. 
" It is, of course, somewhat smoky, but I do not think the 
Royal Agricultural Society can do better than to continue the 
use of this coal in their experiments." 
With regard to the above analysis the Consulting Engineers 
to the Society make the following remarks : — 
The sample of Llangennecb coal submitted for analysis was 
not a picked sample, but a fair average of large and small taken 
* See foot-note on precedicg page. 
