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Updated: June 7, 2025
Boil until the deep blue is displaced by a light bluish green coloration, or until brown stains form on the sides of the flask. Add a solution containing about 3 grams of potassium iodide, as in the standardization, and titrate with thiosulphate solution until the yellow of the liberated iodine is nearly discharged.
If the plate be iodized only to a light-yellow, the result might be of a bluish or grey tinge: and this is generally the case, when the quick is new and strong, and there is an excess of it on the plate, and yet not enough to form the bromide iodide of silver; in which case it would wholly spoil the impression.
A lead glaze simply fused gives a very highly colored yellow spot of potassium iodide; a lead glaze incompletely vitrified gives spots the more decided, the less perfect the vitrification; and a glaze of good quality gives no sensible color at all. M. Herbelin. By EUGENE H. COWLES, ALFRED H. COWLES, AND CHARLES F. MABERY.
Soon all the men got salivated, and things looked serious; but I found that in the mirror factories, where mercury was used extensively, the French Government made the giving of iodide of potassium compulsory to prevent salivation. I carried out this idea, and made every man take a dose every day, but there was great opposition, and hot mercury was finally abandoned."
Mode of treating cuts, wounds, severed arteries Bad bruises to be bathed In hot water Sprains treated with hot fomentation and rest Burns cured by creosote, wood-soot, or flour Drowning; most approved mode of treatment Poisons and their antidotes Soda, saleratus, potash, sulphuric or oxalic acid, lime or baryta, iodine or iodide of potassium, prussic acid, antimony, arsenic, lead, nitrate of silver, phosphorus, alcohol, tobacco, opium, strychnia Bleeding at the lungs, stomach, throat, nose Accidents from lightning Stupefaction, from coal-gas or foul air Fire Fainting Coolness and presence of mind.
It is likely to contain, beside moisture, some iodine chloride, if chlorine was used to liberate the iodine when it was prepared. It may be purified by sublimation after mixing it with a little potassium iodide, which reacts with the iodine chloride, forming potassium chloride and setting free the iodine.
For instance, it permits a patient whose kidneys have been demoralized by iodide of potassium to gain time and recuperate so that he can safely begin to drink iodide again! "I add that terrific shooting pains, which rebel even against chloroform and morphine, often yield to an application of 'green electricity. You ask me, perhaps, of what ingredients this liquid electricity is made.
For treatment give 1 1/2 drachms of iodide of potash in 1/2 pint of water daily for 14 days. Increase to 2 drachms for 14 more days, and then gradually decrease. Divide the tumor and insert gauze saturated with tincture of iodine for 4 days. In 8 days a visible improvement will be noticed, A Neck-Swelling.
Add 5 cc. of bromine water and boil until the excess of bromine is expelled. Then add 1-2 cc. of freshly prepared starch solution, and add thiosulphate solution, drop by drop, until the blue color is discharged. From the data obtained, including the "blank test" of the iodide, calculate the relation of the thiosulphate solution to the normal.
It boils at about 356 deg., and emits a very deep violet colored vapor. It gives off a very appreciable vapor, sufficient for all purposes of forming the iodide of silver on the daguerreotype plate, at a temperature of 45 deg. or even lower. Iodine crystallizes readily. Every operator has found upon the side of the jar in his coating-box, perfectly regular crystals, deposited there by sublimation.
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