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Boeken Boek 1 - 3 van 3 over ... must, of course, depend, in some measure, on the nature of the surface.* The....
" ... must, of course, depend, in some measure, on the nature of the surface.* The following columns set forth the means of observations, at the surface, as -well as at depths of three, " The observations from which the following table has been deduced... "
Transactions of the Royal Geological Society of Cornwall - Pagina 777
1871
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Observations on Metalliferous Deposits, and on Subterranean Temperature ...

William Jory Henwood - 1871
...which the following table has been deduced were made at Alverton, near Truro, in 1852 — 3. * * * Four pits, about two feet deep and two feet wide,...garden loam. The bulb of the thermometers was placed 4 inches below the surface in the centre of each pit, and another thermometer was placed in the same...
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Henwood's Observations on Metalliferous Deposits, Deel 2

William Jory Henwood - 1871
...the following table has been deduced were made at Alverton, near Truro, in 1852 — 3. •;.•-;:* Four pits, about two feet deep and two feet wide,...garden loam. The bulb of the thermometers was placed 4 inches below the surface in the centre of each pit, and another thermometer was placed in the same...
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Transactions of the Royal Geological Society of Cornwall, Volume 8,Deel 2

1871
...which the following table has been deduced were made at Alverton, near Truro, in 1852 — 3. * * * Four pits, about two feet deep and two feet wide,...garden loam. The bulb of the thermometers was placed 4 inches below the surface in the centre of each pit, and another thermometer was placed in the same...
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