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. 1904 Excerpt: ...is neutralized. For neutralization is used a solution of NaOH, and the neutral point is determined by litmus paper. A weak solution of NaOH is added until the material is in the very faintest degree alkaline. In other words, since the solution is at first acid, just enough NaOH is added to pass the neutral point, as ...
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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. 1904 Excerpt: ...is neutralized. For neutralization is used a solution of NaOH, and the neutral point is determined by litmus paper. A weak solution of NaOH is added until the material is in the very faintest degree alkaline. In other words, since the solution is at first acid, just enough NaOH is added to pass the neutral point, as shown by its action upon red and blue litmus paper. After the neutralization the white of an egg is added and the whole is boiled for three-quarters of an hour. 2. Water 5oo c.c. Dry litmus (in cubes) 48 gm. The litmus is steeped in the water for three hours or more, at a temperature of about 6o C, to dissolve as much of the active material as possible. The solution is then filtered. After solution 1 has boiled with the white of an egg for three-quarters of an hour, it is mixed with the filtered litmus solution No. 2, the two together making the bulk up to about a litre, and water is added if necessary to replace evaporation. The solution is then warmed slightly, though not above 6o, in order to avoid as much as possible the changes in the litmus which high temperatures produce. It is then filtered through absorbent cotton, distributed in sterilized tubes, about 8 c.c. in each, and is ready for final sterilization. The sterilizing is carried on as usual by steaming on three successive days. The sterilization always has a tendency to change the color of the litmus to a reddish brown, but the blue is restored after the litmus cools and stands for a few hours in contact with the air. When finally sterilized and cooled the solution should be a deep blue color, so deep a blue that when poured out in Petri dishes the color is quite strong. The litmus of commerce is quite variable in strength, three per cent of litmus (3o gm.) being sometimes sufficien...
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Add this copy of The Theory and Practice of Infant Feeding: With Notes to cart. $68.07, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
Add this copy of The Theory and Practice of Infant Feeding With Notes on to cart. $232.00, very good condition, Sold by Black Swan Books, Inc. rated 3.0 out of 5 stars, ships from Lexington, KY, UNITED STATES, published 1902 by William Wood and Company.
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Seller's Description:
Very Good+ Black-and-white illustrations. Not an ex-library copy. No remainder marks. All books mailed with Delivery Confirmation. All books mailed with Delivery Confirmation. Single sheet (3 1/4 X 7') advertisement for Manual of the Diseases of the Eye also published by Wm. Wood & Co. Is laid in. Lacking the dust jacket if it was issued with one. Previous owner's rubber-stamped name on the front inside cover. The binding is tight. Very good + condition. This is the original 1902 hardcover edition and not an "on demand" printing or recent reissue. Selling Used and Rare books on-line since 1998 and from our bookstore in the heart of the Bluegrass since 1984.; Black-and-white illustrations; 8vo.; ix, 326 pages.
