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Updated: June 1, 2025
During the latter part of the storage battery investigations, after the form of positive element had been determined upon, it became necessary to ascertain what definite proportions and what quality of nickel hydrate and nickel flake would give the best results.
In preparing large quantities of this, we adopt the following method: Fill a four-quart bottle about two-thirds full of hydrate of lime; pour into this about one or two ounces of bromine; then shake well, add more of the bromine, shake well and let it stand for a few hours, adding sufficient bromine to give it a fine red color.
No. 1 is prepared by placing hydrate of lime in a bottle, say to three quarts of the hydrate of lime, add one ounce of pulverized burnt alum, and as much chloride of lime as can be put on a quarter of a dollar, and from 15 to 30 grains of dry pulverized iodine, or enough to change the color of the hydrate of lime, to the slightest possible tinge of yellow.
In contact with a sufficiently concentrated solution of hydrate of potassium or sodium, the chloride of silver, especially if it has been recently prepared, passes partially into the state of brown or black oxide, so that the carbon becomes covered, after remaining sufficiently long in the exciting liquid, with a mixture of chloride and oxide of silver.
These metal layers conduct current to or from the active nickel hydrate in all parts of the tube very efficiently.
If such lime is chiefly a dumping place for low-grade stone and forkings, it has small agricultural value. Land Plaster. The soil wants lime in carbonate form. The oxide and hydrate change to carbonate, and therefore are good. Land plaster is a sulphate, and its tendency is to make a soil sour. It should not be considered as a means of correcting soil acidity. Basic Slag.
I reckon I don't have to match." The secretary opened the note to read: "Where in thunder does that hydrate come from South America or Russia? How much off on the tariff on the creature do we want? Come over to the committee room, where I am, right away. Say it's an urgent message and get in with a tip." The secretary looked up, with a laugh. "You win, Norton. I'm off. Good-by."
In making purchase for use of land the buyer cannot afford to make any appreciable difference in price in favor of air-slaked lime, as compared with a fine stone. Air-Slaking a Slow Process. Lime changes to an air-slaked condition slowly unless it has full exposure. Old heaps will remain in hydrate form for many years, excepting the outside coat, which excludes the air.
Consequently, it is either of little use as a remedy; or, if too much is taken, a disagreeable headache will be the consequence. During the catarrhal stage, which, however, was very mild compared with last year, I derived great benefit from the administration of codeine, in combination with terpine hydrate, in the pill form.
Manufacturers first burn the stone, and in the case of a pure limestone they drive off 44 pounds of each 100 pounds of the weight in burning. Then, they combine enough water with the lime to change it to hydrate form, and that adds 18 pounds weight. It is run through a sieve to remove any coarse material, and then packed in bags which help to exclude the air.
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