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The dilute mineral solutions absorbed by the roots are thus brought where they are in contact with the external air, concentrated by the evaporation of water, and converted in these cells into food materials, such as starch.

As early as 1803 Ritter had attempted to make such a secondary battery. In 1843 Grove also attempted it. But it was not until 1859, when Gaston Planche produced his invention, that anything like a reasonably satisfactory storage battery was made. Planche discovered that sheets of lead immersed in dilute sulphuric acid were very satisfactory for the production of polarization effects.

The vinegar plant, which is closely allied to the yeast plant, has a similar effect upon dilute alcohol, causing it to absorb the oxygen of the air, and become converted into vinegar; and Liebig's eminent opponent, Pasteur, who has done so much for the theory and the practice of vinegar-making, himself suggests that in this case

In the back of her brain there was also, so strangely is the human mind constituted, a kind of relief at being able to use mature logic once more, instead of the dilute form of moral dissertation with which she tried to adapt herself to Eleanor's understanding. "I never intend to marry any one," she was explaining gently.

No such result is obtained as in the preceding experiment, because the rennet ferment is destroyed by heat. Experiment 72. Half fill three test tubes, A, B, C, with one-per-cent solution of sodium carbonate, and add 5 drops of liquor pancreaticus, or a few grains of Fairchild's extract of pancreas, in each. Boil B, and make C acid with dilute hydrochloric acid.

If the silica were washed only with hot water, the solution of these chlorides remaining in the filter after the passage of the original filtrate would gradually become so dilute as to throw down basic salts within the pores of the filter, which would remain with the silica. To avoid this, an acid wash-water is used until the aluminium and iron are practically removed.

Dilute nitric acid gives a white precipitate, soluble in excess, and also in tartaric acid. Marsh's and Reinsch's processes are applicable for the detection of antimony, but Reinsch's is the better. Reinsch's process gives a violet deposit instead of the black, lustrous one of arsenic. A light yellow or dark red corrosive liquid. Symptoms.

This I ascribe to the tea, not as possessing any medicinal qualities, but as tempting them to drink more water, to dilute their salt food more copiously, and, perhaps, to forbear punch, or other strong liquors. He then proceeds, in the pathetick strain, to tell the ladies how, by drinking tea, they injure their health, and, what is yet more dear, their beauty.

If we write on paper with dilute sulphuric acid, and dry and then heat the place written upon, the cellulose is destroyed and charred, and we get black writing produced. The principle involved is the same as in the separation of cotton from mixed woollen and cotton goods by means of sulphuric acid or vitriol.

However, through the centuries that followed, as the Hans spread over the face of the earth, this unearthly strain in them not only became more dilute, but lost its potency; and in the end, the poison of it submerged the power of it, and earth's mankind came again into possession of its inheritance. How all this may be, I do not know.