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In a section entitled "Professional Prescriptions" is a formula for "diarrhoea (acute)": Tincture opium, deodorized, 15 drops; Subnitrate of bismuth, 2 drachms; Simple syrup, 1 ⁄ 2 ounce; Chalk mixture, 1 1 ⁄ 2 ounces, "A teaspoonful every two or three hours to a child one year old." "Diarrhoea (chronic)": Aqueous extract of ergot, 20 ...
A restored gesso panel representing St. Martin of Tours, from St. Michael and All Angels Church, Lyndhurst, Hampshire. Gesso (Italian pronunciation:; 'chalk', from the Latin: gypsum, from Greek: γύψος), also known as "glue gesso" or "Italian gesso", [1] is a white paint mixture used to coat rigid surfaces such as wooden painting panels or masonite as a permanent absorbent primer substrate ...
Thomas Wedgwood and Humphry Davy produced more substantial but still impermanent shadow images on coated paper and leather around the year 1800. Nicéphore Niépce succeeded in photographing camera images on paper coated with silver chloride in 1816 but he, too, could not make his results light-fast. [ 5 ]
Chalk is so common in Cretaceous marine beds that the Cretaceous Period was named for these deposits. The name Cretaceous was derived from Latin creta, meaning chalk. [10] Some deposits of chalk were formed after the Cretaceous. [11] The Chalk Group is a European stratigraphic unit deposited during the late Cretaceous Period.
Previous discoveries of photosensitive methods and substances—including silver nitrate by Albertus Magnus in the 13th century, [8] a silver and chalk mixture by Johann Heinrich Schulze in 1724, [9] [10] and Joseph Niépce's bitumen-based heliography in 1822—contributed to development of the daguerreotype. [6] [11]
JC Olivera/Variety via Getty. James Kennedy at DirecTV's Christmas at Kathy's at the Hiltons' private residence on December 10, 2024 in Los Angeles, California.
With the addition of a grit such as boron carbide (in a modified formulation given as 70% KClO 3, 19% red phosphorus, 3% sulfur, 3% chalk, and 5% boron carbide by weight), Armstrong's mixture has been considered for use in firearm primers. [5] This use as primer for artillery propellants may have been Armstrong's original purpose. [6]
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