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Thus the small Lucerne clover or medicago is often sold as "shamrock" to Irish patriots, and the watercress has been solemnly pat forward as the true shamrock simply because old writers tell us, as evidence of the barbarous state of the Irish, that they fed upon shamrocks and watercress. It was used for the manufacture of oxalic acid, which was sold as "salts of lemons" for removing iron-mould.
Potassium permanganate oxidizes ferrous salts in cold, acid solution promptly and completely to the ferric condition, while in hot acid solution it also enters into a definite reaction with oxalic acid, by which the latter is oxidized to carbon dioxide and water.
If the pyrolusite under examination is known to be of high grade, say 80 per cent pure, or above the calculation of the oxalic acid needed may be based upon an assumption that the mineral is all MnO . If the quality of the mineral is unknown, it is better to weigh out three portions instead of two and to add to one of these the amount of oxalic prescribed, assuming complete purity of the mineral.
An eminent chemist informs me, that he has made experiments with the oxalic acid, and found that when this was also concentrated, it has similar effects; insomuch that no animal can contain a grain of it if taken into the throat or stomach: and thus might we also be led to consider the elegant, and in itself harmless, wood-sorrel, as a poisonous plant.
It should be noted that the acid oxalate and the acid tartrate each contain one hydrogen atom replaceable by a base, while the tetroxalate contains three such atoms and the oxalic acid two. Soda ash is crude sodium carbonate.
Bring boiler to the boil, put in 3 or 4 oz. aniline black, either the deep black or the blue black or a mixture of the two, add ¼ gill hydrochloric acid or sulphuric acid, or 3 oz. oxalic acid, shut off steam, enter, and handle for half an hour, lift, rinse through water, dye the cotton in the manner previously described. Dyer. By Prof.
"Humpo's finger shoots out about two yards long; dashes back his mane with his other hand; rushes in from under it. 'Then, sir, will you tell the jury why, to make this purchase of oxalic acid on the day before you leave home, why you go to a place in which you are unknown and to a place farther away from you than three other centres, one at your very door?
Augustus Cooper, called distractedly on the other three-and-seventy pupils to furnish her with oxalic acid for her own private drinking; and, the call not being honoured, made another rush at Mr. Cooper, and then had her stay-lace cut, and was carried off to bed. Mr.
The leading symptom is tetanic spasm. 5. =Poisons Affecting the Heart.= These kill by sudden shock, syncope, or collapse. They comprise prussic acid, dilute solution of oxalic acid and oxalates, aconite, digitalis, strophanthus, convallaria, and tobacco. 6. =Poisons Acting on the Lungs.= These have for their type carbonic acid gas and coal gas.
The oxidation of aniline has been carefully investigated. In alkaline solution azobenzene results, while arsenic acid produces the violet-colouring matter violaniline. Hydrochloric acid and potassium chlorate give chloranil. Potassium permanganate in neutral solution oxidizes it to nitrobenzene, in alkaline solution to azobenzene, ammonia and oxalic acid, in acid solution to aniline black.
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