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"The rays," he continued, "passed through all the metals tested, with a facility varying, roughly speaking, with the density of the metal. These phenomena I have discussed carefully in my report to the Würzburg society, and you will find all the technical results therein stated." He showed a photograph of a small sheet of zinc.
The Daniell's battery consisted of 320 cells containing plates of copper and zinc; the speed attained by the boat with this battery did not reach one mile and a quarter per hour; when 64 Grove cells were substituted, the speed came to two and a quarter miles per hour; the boat was 38 feet long. 71/2 beam, and 3 feet deep.
Messages have been sent from England to America through one Atlantic cable and back again to England through another, and there received on the mirror galvanometer, the electric current used being that from a toy battery made out of a lady's silver thimble, a grain of zinc, and a drop of acidulated water.
The first thing is to get a good set of the prints to be reproduced. That Silva got from this album. The moulds might be made by cutting them in wood or metal; but that would take an expert and besides, I fancy it would be too slow for Silva. He had a quicker way than that perhaps by transferring them to a plate of zinc or copper and then eating them out with acid.
While this had its value, it had also its demerits, one of which was the total extermination of the American wood-engraver, except for a few men like Timothy Cole, whose genius and skill made it possible for them, by the excellence of their work, to survive the great difference between twenty cents a square inch for transferring on zinc and twenty dollars a square inch for engraving on wood.
One of them called out, gayly: "Do you wish to find your sweethearts, signori? That isn't the way!" A little farther, Varhely and his adversary encountered a monk with a cowl drawn over his head so that only his eyes could be seen, who, holding out a zinc money-box, demanded 'elemosina', alms for the sick in hospitals. Menko opened his pocketbook, and dropped in the box a dozen pieces of gold.
I have said, in effect, a little above, that, while the current is running, the entire circuit is one complete magnet, which extends from the inner or positive sides of the zinc plates, where the current commences, all the way around to the outer or negative aides of the zinc plates, to which it returns.
Before her, ranged neatly on the zinc covered shelf, was a row of inverted wine glasses, three of them still dripping, having been washed after the last customers by a hasty dip into a bucket of cold water. "Mobilised," said Maubert slowly. "I am mobilised at last." Madame Maubert looked up from her knitting.
'Treatment. More stimulating collyria will now be necessary, as solutions of sulphate of zinc, copper, acetate of lead, &c. See No. 1, 2, 3, of the Collyria. The direct application of sulphate of copper, or nitrate of silver, will often be of great benefit in changing the action of the parts.
The materials of which it is composed include hair-cloth, woollen-cloth, a cotton shirt, a woollen cloak, and some sacking; goat skin, sheep's fleece, straw, and palmetto cord; rush mats, a palmetto mat, split-cane baskets and wicker baskets; bits of wood, a piece of cork, bark and sticks; petroleum tins flattened out, sheet iron, zinc, and jam and other tins; an earthenware dish and a stone bottle, with bits of crockery, stones, and a cow's horn to weight some of the other items down.
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