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This plant, indeed, sometimes occurs on the same coin with the date palm. The date-tree, in order to bring its fruit to perfection, requires a mean temperature of 78 deg. Fahr. The vine, on the other hand, cannot be cultivated to any extent if the mean temperature be above 72 deg. Fahr.
The result is that it continues its journey until it may come within the tropics without having gained a temperature of more than 35° Fahr., the increase in heat being due in small measure to that which it receives from the earth's interior and that which it acquires from the overlying warmer water.
If the radiating surface should be reduced to three-thirty-seconds of an inch, the temperature would reach 6400 degrees Fahr.
Scientific observation afterwards showed that the water had an almost uniform temperature, even in the hottest days of summer, of 39.6 degrees Fahr., and that there was free carbonic acid gas to the extent of 138.36 cubic inches.
This travelled from east to west and could conceivably have come from some of the Graham Land volcanoes, now about 300 miles distant to the north-west. The upper current of air probably would come from that direction. Heavy rime. Pack unbroken and unchanged as far as visible. No land for 22 miles. No animal life observed." "September 7. Temperature, -10.8° Fahr.
"Destructively distil the following substances down to a point just short of carbonization, so that the residuum can be taken out of the retort, powdered, and acted on by all the solvents just as the asphalt in previous page. The distillation should be carried to, say, 600 degrees or 700 degrees Fahr., but not continued long enough to wholly reduce mass to charcoal, but always run to blackness.
A quarter of an hour later the unseasonable visitor disappeared again, only to rise again at 11.40 a.m., set at 1 p.m., rise at 1.10 p.m., and set lingeringly at 1.20 p.m. These curious phenomena were due to refraction, which amounted to 2° 37´ at 1.20 p.m. The temperature was 15° below zero Fahr. and we calculated that the refraction was 2° above normal.
A spring of warm and bitter water flowed from the hill over the surface to a distance of 400 or 500 yards, where it was absorbed by the soil. The temperature of the sources immediately under the hill was 106o Fahr., the thermometer standing at 80o in the air, and the aneroid gave an altitude of 728 feet above the sea. The rocks behind these springs were covered with ruins of mosques and houses.
The temperature at 1 p.m. that day was -23° Fahr., i.e. 55° of frost. The men camped abreast of "Corner Camp," where they had been on February 1, on the evening of March 19. The next day, after being delayed for some hours by bad weather, they turned towards Castle Rock and proceeded across the disturbed area where the Barrier impinges upon the land.
112. =Leg of Mutton with Caper Sauce.= Put a leg of mutton, weighing about six pounds, on the fire in enough boiling hot water to cover it; boil it for five minutes, skimming it as often as any scum rises, then pour in enough cold water to reduce the heat to about 160° Fahr., season with a tablespoonful of salt, and simmer the meat at that heat until it is tender, allowing about twenty minutes cooking to each pound of meat; if turnips are to be served with it as a garnish, choose them of equal size, pare them smoothly, and boil them with the mutton; if the vegetables are cooked first take them up without breaking, and set them back off the fire, in a little of the mutton stock, to keep hot.
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