lvili 
. 
3 
f Ibs. weight lifted one foot high by 
f given quantities of (Welsh) coal 
illions o 
in m1 
time, expressed 
the consumption o 
GIG SP 
8-6b | 8-IP 
G-1¢ EP 
$39 | 6-&b 
G.0¢ | Gr 
G-0¢ L-GP 
S-1G “EP 
LAG | €-&p 
9-19 | P-SP 
GIG | &-8h 
9-1¢ | b&b 
1:0 | 9-Gb 
P-6G | G-bP 
PIG | G-&P 
6-bS | I-9F 
8-¢ “OF 
9-€¢ “Gb 
1:25 | 6-Lb 
6:69 | L-6b 
09 -0¢ 
}4Mo |} Teysnq 
Tg 10g 
“ALONG 
x SOULS 
my JO 
OC UI 
‘aged 
8-19 | 6-1¢ L1G 
9-69 | P-E¢ 9¢ 
£9 | 8-69 8@ 
1-69 | 6-2¢ 86 
1-€9 | 6-69 0€ 
1:99 | &-G¢ Lg 
U:S9 | 9-FS L& 
“19 | 6-99 SP 
L-b9 | 6-bS LY 
GQ | Gorg 0g 
8-49 | &-bg bG 
‘69 | 8-G¢ (G5 
8S | 1-8 19 
“9G LP 8¢ 
GGG | 9-9F 19 
6:9¢ | 8-LP Ig 
6:99 | 8-Lh GG 
Gregg | 9:-9F 9¢ 
9-&G GY 6S 
L1G | ¥-S 8¢ 
tqmo | Toysnq 
Borat Wd | . sours 
uy jo 
Toq umn yy 
“ALA 
‘oye 
G1¢ | &-8h 
9-6F | LIP 
Grr | 1-2 
G8 | 1-G& 
€-9E | G-0€ 
I-8§ GE 
1-88 | §-8Z 
9-8 | 6-86 
PVE | 6-86 
1:68 | 6.86 
I-7E | 1-8Z 
€-18 | €:96 
G:0€ | b-96 
G-1E | $-96 
PLG £6 
b-bG | G06 
GFZ | 9-06 
G&G | G61 
6-6 | €-6I1 
D-06 “AL 
tomo |4-Toeysnq 
10g Tod 
“ALOG 
y SOULS 
-ugy Jo 
oq UINN, 
. 
109eq, 
x Column 2; 1811-1838. Lean, Historical Statement, pp. 10, 139. 
1839-1840. Pole, Cornish Pumping Engine, p. 70. 
1841-1860. Morshead, Proceedings of the Inst. of Civil 
Engineers, xxiii., p. 46. 
1861-1870. Lean, Hngine Reporter, Passim. 
Computed from corresponding periods in 
Lean, Historical Statement, pp. 10, 139. 
1839-1870. 
+ Column 3, 1811-1838. 
Column 4. 
+ This column has been courteously supplied by Mr. Lean, the present 
(and third) Registrar and Reporter. 
