152 
REPORT —1854. 
3 ft. Bar, 1 in. sq. 
Blaenavon Iron. 
Strong bright forge. 
Pig before melting, 845. 
3 ft. Bar, 1 in. sq. 
Corbyns Hall, near Dudley. 
Hot-blast Mine No. 1. 
Pig before melting, 693. 
Mr.Fairbairn'sExperiments on 
No. 3 Ilot-blast Eglinlon, 
the bars being 4 ft. 6 in. 
Melting 1 
1 ” 2 
3 
» 4 
„ & 
„ 6 
„ 7 
i „ ® 
,, 9 
„ io 
., 11 
„ 12 
„ 13 
„ 14 
„ 15 
,. 16 
,, 17 
„ 18 
„ 19 
„ 20 
„ 21 
„ 22 
„ 23 
White with 1 704 
brown core J 794 
811 
. 740 
.. 704 
.621 
. 854 
. 974 
. 621 
.1026 
.. 834 
. G49 
. 789 
Faulty bur.. 
. G96 
. 929 
Bar faulty... 
. 861 
.1051 
. 721 
... 1166 
. 920 
Fracture light grey, 
with white, ring outside 801 
Faulty bar.. 
.565 
Corbyns Hall (continued). 
Melting .. g53 
:: ar,:::::. 2 
.. 1 
Pot broke. 
” . 956 , 
;; .. 
Blaenavon strong bright forge fracture of pig of the ordinary light grey crystalh 
structure of hard forge pigs .— At the first melting it became white, with a brown' 
greyish core in the middle, of about * in. diameter. The fractures of all We otn 
meltings were white, but for the three or four last meltings the iron became soi > 
and would file; it had also lost its silvery whiteness and became of a more nu 
colour. 
I eee by a memorandum I have found, that I tested this iron in 1821, when t f 
strength was logo lbs. for a 3-ft. bar. |b 
It is only in the third melting that the original strength of this pig iron, 8 •’ 
u obtained, viz. 8(IG lb»., while in the No. 1 Hot-bla 9 t Mine pig, th e strc !!f 
winch was only GOi lbs., it increases to 749 lbs. in the first, melting. VoU * i iron 
that I arrive at the same maximum strength in the twclftli melting of the . 
that Mr. Hurbairn did; the Corbyna Hall rising from 749 lbs. to 1166 lbs., 
Eghnton from 71 4 lbs. to 1060 lbs. in the twelfth meltings. The roaxunm” streng 
of the Blaenavon u at the nineteenth melting. . the 
At the twenty-third melting the pot broke, and ranch of the iron ran mm 
ash-pit, but that which remained in the pot ran out quite fiuid, but set immei 
About 22 lbs. weight of coke was used to each melting, taking about one 
The weight put on the bars at each time was 2i lbs. I have added the weight®! 
bars and f rds the weight of the pigs, in all the weights given, which was tne 
breaking weight. 6 
W. HaWKBS. 
On Ocean Steamers and Clipper Ships. 
By Andrew Henderson, A.I.C.E . - de 
Speed, size and proportions.— Considering actual experience at sea theoniyg ^ 
in the application of science to the improvement of our shipping, the auth 
some years laboured to obtain a record (in the archives of the Institute of C«" 
gmeers) of the size, proportions, and form of steam-vessels, as well as th 
