3 I (> MKT.U.I.I \<C'\ or i'AST IRON.
bed. In general practice, the elumees are that the majority of founders would not 14*0 to the labor and expense of endeavoring to collect all this line shot and scrap so closely as was done with these tests. Hence the loss of iron to be experienced in actual practice can be reckoned as the greatest with founders aiming to economize fuel in an. extreme measure, thereby not procuring t^ood hot iron. All experienced founders know that hi\L»'h beds of fuel ^ive hotter iron, but that it melts slower than imn charged on low beds. The difference in the heights of bed coke used in the experiments in Table 65 was about to inches.
The four heats seen in Table 65 having been completed, I next tested stove plate iron in comparison with the sandless roll iron as used in previous heats. In selecting the stove plate, I secured it as clean as I
TAIM.K 6>.-—ANAIA 'Si -:S «F IKnN IN M.A«J FK<»N1 I.<»\V AND HIU11 KKDS,
si'nYF, HAH. AM» HKAV\ IKON-.-. SI.K I*A»;K. 317.
could, picking it out from the serap pile. Notwithstanding* this, its loss will be seen, by referring to Table 66, tests 13 and 14, toexeeed by about 7 percent, that of the more solid heavy iron used in comparison with it.
After testing the stove plate referred to, I then ran two heats having a plate easting ^4 of an inch thick,ing. In all these four heats, it will be seen the loss was slightly greater with the iron charged on the high bed, or that side using the most fuel. While this is true, it is to be said that more fine shot and scrap was found in the side having the low .... ........ 3. .11 3-»3 .'•.•W 3-21