fire were found to be uninjured while those of the iron one were about worn out. In Prussia several worn-out plates of iron boilers have lately been re placed with steel which it is stated lasts four times as long. As steel is twice as strong as iron thinner plates of the former may be employed for boilers and boiler On account of its thin plates and thus much, scientific american, 1864-01-30


fire were found to be uninjured while those of the iron one were about worn out. In Prussia several worn-out plates of iron boilers have lately been re placed with steel which it is stated lasts four times as long. As steel is twice as strong as iron thinner plates of the former may be employed for boilers and boiler On account of its thin plates and thus much, scientific american, 1864-01-30


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