large central tunnel, whose breadth at top is _—_—OOO rrr? — — the blast furnace is a great devourer, and will thin the sur- The Temperature of the Snn. twenty five f.et, while the twenty five feet beams are used rounding country in an alarmingly short space of time. M. Violle considers that the… … 32" UGHT BEAM namic method lead the investigator to conclude that steel ,as it emerges from a Siemens Martin furnace, has a tempera. ture of 2,732° Fah. Ifit be admitted that the average emis- sive power of the sun is sensibly equal to that of steelina etate of fusion, determined under like…
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