388 
Tas. VI.—English Irons.—Milton, No. 1 Pig Iron, Hot Blast— 
SEVENTH REPORT—1837. 
Yorkshire. 
EXPERIMENT 1. 
Depth of bar, 1°064 
Breadth of do. 1-064 
Distance between 
supports, 4 ft. 6 in. 
Weight of bar 5 ft. 
EXPERIMENT 2, 
Depth of bar, 1058 
Breadth of do. 1:020 
Distance between 
supports, 4ft. Gin. 
Weight of bar 5ft. 
EXPERIMENT 3. 
Depth of bar, 1090 
Breadth of do. 1°047 
Distance between 
supports, 2ft, 3in, 
EXPERIMENT 4. 
Depth of bar, 1°067 
Breadth of do. 1040 
Distance between 
supports, 2ft. 3in. 
long, 161b. 9 oz. long, 161b. 8 oz. 
mo | gs .2 jae o ee ieee ls 2 a aw 
el) ae | See a eee Wee) cbt ic |) peal h aoeeinae 
cal gg|ss ‘o 2 o | 8 a S3i|se & ESlis 
2 |/Sa/22] ¢ |SSlsel es | esl] s2] 2 |e eek 
> |22/Sc | @ |e l(Ss| & | 2E/Sc] ek Ss 
o o ag 3) x as @ 2 as 2 2 Aas 
ele |PSi eis [Ps e je |*si ele |78 
42 | -103} + 42 | 103} + || 112 | -033 112 | -033 
112 | -294]| -010 || 112 | -298| -006 || 224 | -066 224 | 070) + 
182 | -499| -038 || 182 | 518] -033 || 336 | -103| -004|| 336 | -110)| -004 
238 | -685 | :065 || 238 | -710| -056 || 448 | -143} -007 || 448 | -153| -006 
294 | -892| -094 || 294 | -922| -090]| 560 | -186| -009|| 560 | -200) -009 
350 |1-:126| -139 || 350 |1-160| -135 || 672 | -236| -015 || 672 | -250)| -016 
406 |1-382 |broke|| 406 |1-480| -209 || 784 | -286| -024|| 784 | -306)| -025 
420 \broke 896 | -350) -038 || 896 | -372| -041 
952 |broke 924 |broke 
Broke 3 of an inch ||.". Ultimate deflec-||.". Ultimate deflec-||.". Ultimate deflec- 
from the centre. |} tion = 1-492. tion = ‘379. tion = °388. 
Broke 14 inch from||Broke at the cen-|\Broke } of an inch 
the centre. tre from the centre. 
The general appearance of this iron is the usual central porosity of crystallization, 
which no doubt takes place in consequence of a greater degree of rapidity in the 
cooling on the outside than within. In the larger descriptions of castings these marks 
are particularly observable, as the interior mass retains its fluidity for some time after 
the exterior has assumed the solid form: the phenomena of crystallization are there- 
fore completed under different influences, and hence arises the great and prominent 
difference which exists in the granulated surface of a large fracture. The working 
powers of the Milton iron are much akin to the Carron No. 2, cold blast: it possesses 
less lustre than the Elsicar, but has greater fluidity than appearances would indicate. 
Results reduced to those of hars 1:00 inch square. 
Product 
‘ heesced Breaking | Ultimate | 3 ay a, a 
Specific in Ibs, pe c, weight deflection power of 
gravity. square inch. (0). in ian paris 
Experiment Ist, bar 4 ft. 7-016 
6 in. between supports ... 6:977 | 11701000 | 387-1 1-471 495°8 
Experiment 2nd, bar 4 ft. ' : ae ’ 
6 in, between supports we 6-936 | 12248000 | 367 i igi 5809 
Mean...| 6°976 | 11974500 | 352°5 1-525 538°3 
Experiment 3rd, bar 2 ft. ; : ‘ 
3 in. between supports oe } cognate arene psi 413 316-0 
Experiment 4th, bar 2 ft. : : ne 
3 in, between supports aa } "AAI? oer 730°4 414 323°0 
MECRIE cecil) cuesw~a9 || weteeses ne 7728 ‘413 319-5 
