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water that dribbled down the sides, and tasting the moisture by dipping in their fingers. I went to them, and found them Germans. They were very obliging; and, as I understood the language, informed me they were very well versed in searching aiter inines, which by thus tasting the water they could discover. I mentioned what I had heard of the divining-rod, in use on the Mendip Hills, in Somersetshire, which bends when held over places that coutain metallic ore; they said that might wel be, for a piece of gold, siiver, or any metal, suspended on the end of a very slender switch, when carried over a mine of the same metal, would be so attracted as to bend the end of the stick. Some time after, I happened to be at a silversmith's at Bath, who had a very curious pair of scales, inclosed in a glass case. I admire i them; and he said they would weign to the 200th part of a grain ; and there lay in the window a block of solid silver, about six inches square and two inches thick. What the abovementioned persons told me at Scarborough came into my head, and I thought this a good opportunity to try how far what they said was true. I, therefore, had a shilling put into one scale, and the heam, which was about 18 inches long, made perfectly level by weights in the other scale; then I introduced the block of silver under the scale that had the shilling, and the beam dropped at that end a full quarter of an inch, and stood there until the block of silver was removed, when it immcdiately returned to the equipoize and level it was before: and this we repeated several times, and it always answered the same.
These curious scales were inclosed in the glass case, and the door shut, at every experiment.
The other matter, I think, may be made useful for keeping metal pipes or boilers from the furring, or sony excrescence, that lodges from boiling water often in them. A friend of inine at Rochester put a common flat shell of an oyster into a new tea-kettle, and kept it in two or three years. During all the time the shell was in the tea-kettle, the tea-kettle gathered no fur, but all the furring settled on the oyster shell, which I have in my possession now, and which is about two inches thick, and something bigger than it was when put in, and perfectly smooth at the bottofi, and where at the edge it lead from time to time slipped against the side of the tea-kettle, in appearance like a hone you set razor's on; but on the top of the shell the fur was like any thing boiling up, curiy aid uneven. The water there comes from chalky lands. I live in Essex, and have tried the shell, which also gathered the fui, bui of a different appearance, being more like smooth sand or gravel; but the shell increased in thickness. If this can be turned to account, in respect to keeping boilers and pipes clear, or shewing the nature of the land through which the streams have passed, I shall be happy. 1791, March.
120;-revision of the English, 148.
lish Bible, 148.
stances are hurtful to, 497 ;--fossil, discovered in several
Cat in the pan, to turn, 66.
tore, 311;-his use of exclamations, 343.
Daisy, derivation of, 111.
184, 189;-Ode in Memory of Mrs. Killigrew, 341;
Earing, explanation of the word, 89.
Fathers, manuscripts of the, 22.