This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 Excerpt: ...on the human system is too well known to need description. "In its metallic state, Hg has been taken with impunity in quantities of a pound ...
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 Excerpt: ...on the human system is too well known to need description. "In its metallic state, Hg has been taken with impunity in quantities of a pound weight" ("American Cyclopedia"), but when finely divided, as in vapor, mercurial ointment, f or "blue-pill," its effects are marked. It renders the patient extremely susceptible to colds; acts, as is generally thought, upon the liver, increasing the secretion of bile, and repeated doses produce " salivation." Compounds.--Mercuric Oxide, Hg0, "red precipi Mirrors were anciently made of steel or silver, highly polished. They were very liable to rust and tarnish, and so a piece of sponge, sprinkled with pumice-stone, was suspended from the handle for rubbing the mirror before use. Seneca, in lamenting over the extravagance of his time among the old Romans, says: "Every young woman nowadays must have a silver mirror." The process of "silvering " ordinary mirrors is briefly as follows: Tin-foil is first spread evenly upon a marble table, and then the Hg is carefully poured over it. The two metals combine, forming a bright amalgam. A clean, dry plate of glass is then carefully pushed forward over the table so as to carry the superfluous Hg before it, and also prevent the air from getting between the glass and the amalgam. Weights are afterward added to cause the film to cling more closely. In twenty-four hours the plate is removed, and in three or four weeks is dry enough to be framed. When we look in a mirror we rarely realize what it has cost others to thus minister to our comfort. The workmen are short-lived. A paralysis sometimes attacks them within a few weeks after they enter the manufactory, and it is thought remarkable if a man escapes for a year or two....
Good/no dj; decorative red coth cover with spine ends worn. Name and city written twice inside, but clean with unmarked text and strong hinges. Corners showing. Covers and spine still reasonably bright and clear.
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