 | William Jory Henwood - 1871 - 294 pagina’s
...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... | |
 | William Jory Henwood - 1871 - 312 pagina’s
...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... | |
 | Royal Geological Society of Cornwall - 1871 - 346 pagina’s
...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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... 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... 