[Footnote: I
watched day by day for weeks the erection of a great building in Paris,
and I noticed how little iron or steel was used as compared with that in
such structures in New York. We shall undoubtedly come to that.] Every
scrap of iron should be conserved, cry our constructive prophets, even as
the Indians treasured it. We may not need it, but succeeding generations
will. It may be recast to their use. We are but its trustees. [Footnote:
See, "Iron Ore Resources of the World," International Geological Congress,
1910.]
_Forests_[Footnote: Van Hise, pp. 223-262.]--A reduction of the waste in
cutting (this is 25 per cent of the total value of the timber cut); of the
waste in milling and manufacture, and in turpentining. This last waste is
appalling but preventable in full or large measure. The lessening the
demand for lumber by a preservative treatment of all merchantable timber.
A utilization of by-products. (Undoubtedly science will be most helpful
here.) Precautions against fires and their control.
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