442
MOLESWORTH’S POCKET-BOOK
BliAriT FUBNACES.
The accompanying table
gives tho interior dimensions
of blast furnaces selected from
different countries.
The dimensions correspond
with the letters in the diagram.
In some furnaces the lines are
curved so that the dimensions
merely give a near approxi-
mation to their -actual figure.
The dimensions are in feet.
A. B. C. D. E. ' F. G. H. I. J.
Welsh .. Staffordshire Cleveland.. Belgian .. French .. German .. American.. 10 6 5 9s 5 4i u 10 16 20 16| 14* 13i 16 17 16 17 15* 13| 16 11 3i 8 5f 4 4 8 8i 31 8 5i 4 4 6 11 4 9 s; 3 9 7 20 ! 18 1 8 9 1 6 U 22 6 6 14 10 10 3 25 40 28f 37 36 I 19 56 53 63 60 57 51 41
STEEL MANUFACTURE. (See ‘ Min. Inst. Civ. Eng.,’ xlii.)
Ckucible or Pot Steel Process. .
Puddled iron of good quality, or mild Bessemer steel scrap,
is fused with manguniferous pig iron or spiegeleisen, v.hic
—g with coke in
furnaces a mixture of mottled cast iron in a tolerably h
state of division, with pulverized calcined iron ore and cha -
coal pow“ The proportions of carbon in the brands are
Brand .. . • 3 1 2
I Percentage । 1 of carbon J •1 to "85 ’85 to ’95 Very Mason’s
1 soft. tool.
1 J -03
•95 to 1’ljl’l to 1-2
Dies, i Cutting
tools.
•02
1-2 to 1-3
Razors.