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He had got a pork-pie, a little bread and cheese, some large onions to roast, a couple of raw apples, an orange, and papers of soda and tartaric acid to compound effervescing draughts. When these dainties were finished, he proceeded to warm some beer in a pan, with ginger, spice, and sugar, and then lay back in his chair and sipped it slowly, gazing before him, and thinking over his misfortunes.
Tartaric acid is such a substance; and if a single spore of the commonest and most troublesome of moulds Penicillium be sown in a saucerful of water, in which tartrate of ammonia, with a small percentage of phosphates and sulphates is contained, and kept warm, whether in the dark or exposed to light, it will, in a short time, give rise to a thick crust of mould, which contains many million times the weight of the original spore, in protein compounds and cellulose.
Here is an example in confirmation, taken from Duclaux's book on Pasteur: Herschel established a relation between the crystalline structure of quartz and the rotatory power of the substance; later on, Biot established it for sugar, tartaric acid, etc. i.e., for substances in solution, whence he concluded that the rotatory power is due to the form of the molecule itself, not to the arrangement of the molecules in relation to one another.
For I may tell you that, so far from being harmful, soda and tartaric acid are frequently taken as a remedy against drunken headache.
If these precautions are neglected, it is scarcely possible to secure a successful fermentation in our flasks, because the yeast sown is immediately held in check by a development of anaerobian vibrios. For greater security, we may add to the fermentable liquid, at the moment when it is prepared, a very small quantity of tartaric acid, which will prevent the development of butyric vibrios.
Then he stirred in a little bichlorate of magnesia. But Mrs. Peterkin didn't like that. Then he added some tartaric acid and some hypersulphate of lime. But no; it was no better. "I have it!" exclaimed the chemist, "a little ammonia is just the thing!" No, it wasn't the thing at all.
Grate the rind of one orange and squeeze the juice, taking care to reject the seeds; add to this a pinch of tartaric acid; then stir in confectioners' sugar until it is stiff enough to form into balls the size of a small marble. This is delicious candy. The same process for lemon drops, using lemons in place of orange. Color a faint yellow. Make the uncooked cream as in the foregoing recipe.
As a very large margin of profit is indulged in by the manufacturers of baking powders, we subjoin a good formula for making the article at home at a considerable saving. 261. =Baking Powder.= Mix thoroughly by powdering and sifting together several times the following ingredients; four ounces of tartaric acid, and six ounces each of bi-carbonate of soda, and starch.
Take of rochelle salts, 2 drachms; bicarbonate of soda, 2 scruples; put these into a blue paper, and put 35 grains of tartaric acid into a white paper. To use, put each into different tumblers, half fill each with water, and put a little loaf sugar in with the acid, then pour them together and drink; this makes a very pleasant cathartic.
An English gentleman gave one of his servants who complained of being troubled with these unwelcome guests two good-sized doses of tartaric acid and carbonate of soda a second apart. The immediate exit of the devil was so apparent that the fame of the prescriber as a medical man was made at once.
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