W. Putnam
| & Mobile | | | | | |
| R.R. | | | | | |
| | | | | | |
43| " |1872| " & | " | " |Temporary| "
| | | oiling | | | prot'n |
| | | | | | |
44|Galveston & |1870|Charring | " | " | " | "
| Houston |1874| | | | |
| R.R. | | | | | |
--+------------+----+-----------+---------+----------+---------+---------------
COMMENTS ON MISCELLANEOUS EXPERIMENTS.
Experiments Nos. 1, 2, and 3 relate to the Earle process, from which
great results were expected from 1839 to 1844. It consisted in immersing
timber, rope, canvas, etc., in a hot solution of one pound of sulphate
of copper and three pounds of sulphate of iron mixed in twenty gallons
of water. It was first tested on some hemlock paving blocks on Chestnut
Street, Philadelphia, and for a time seemed to promise good results.
Experiments with prepared rope, exposed in a fungus pit, by Mr. James
Archbald, Chief Engineer of the Delaware and Hudson Canal, seemed also
favorable.
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