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Updated: May 24, 2025
Watt reckoned his boilers as capable of evaporating 10.08 cubic feet of water with a bushel or 84 lbs. of Newcastle coal, which is equivalent to 7 1/2 lbs. of water evaporated by 1 lb. of coal, and this may be taken as the performance of common land boilers at the present time.
The piercing of the rattan strips at suitable intervals is facilitated by the use of a block of wood grooved for the reception of the strip and pierced with holes opening into the groove at the required intervals. The last is made by boiling the seeds of the rattan in water and evaporating the product until it has the consistency of a thick paste. The Punans also excel in this craft.
But what was I thinking of! whither were my meditations carrying me away? was it not coming to pass that the cannibals were rousing my envy instead of exciting my horror? Very shortly after this I heard Dowlas talking about the possibility of obtaining salt by evaporating seawater in the sun; "and then," he added, "we can salt down the rest."
This is provided for by attaching to the pipes evaporating pans filled with water, by which the moisture can be perfectly regulated and controlled. The capacity of the boiler and the length of the pipes should be in proportion to the size of the house to be heated, bearing in mind that it is better to have a reserve of heating power for extraordinary occasions.
O, this man, like the most of mankind, may be an unreflecting person. Then, in this case, thoughts, feelings, and purposes are continually rising up within his soul like the clouds and exhalations of an evaporating deluge, and at the time of their rise he subjects them to no scrutiny of conscience, and is not pained in the least by their moral character and significance.
No one can see much of limestone caverns without discovering that the surfaces over which any currents there may be are constrained to pass, present an abundance of moisture to refrigerate the currents; and it is not unreasonable to suppose that the large number of evaporating surfaces, which currents passing through heaps of débris such as the basaltic stones described on page 261 come in contact with, are the main cause of the specially low temperature observed under such circumstances.
At dawn, and from hour to hour throughout the day, I went to see him where he sprawled on a paillasse on the floor, like some red-haired stricken beast, with out-stretched limbs, convulsed by spasms which displaced the dirty blanket that covered him. He lost flesh with such incredible rapidity that he seemed to be evaporating through the gaping wound in the nape of his neck.
Mr Bang, as I have said, had rallied by this time, and with the tact of a gentleman, appeared to have forgotten whether his new ally was black, blue, or green, while the claret, stimulating him into self possession, was evaporating in broken French. But his man Pegtop had been pushed off his balance altogether; his equanimity was utterly gone.
And for this, what was needed was not so much new principles as elaborate and costly machinery for the application of a principle long familiar the principle, namely, that an evaporating liquid reduces the temperature of its immediate surroundings, including its own substance.
This stream seems to be loaded with carbonate of lime, and the water, evaporating, leaves an incrustation on the rocks; and this process has been continued for a long time, for extensive deposits are noticed in which are basins with bubbling springs. The water is salty. We have to make a portage here, which is completed in about three hours; then on we go.
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