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BERZELIANITE

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BENZALDEHYDE

A colourless liquid of high refractive character and almondlike odour, soluble in alcohol and ether, having a sp. gr. of 105 and a boilingpoint of 1790 C. It is used in perfumery and for flavouring purposes.

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BACTOX

A powerful proprietary antiseptic and disinfectant made from certain phenoloids in a form miscible with water.

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BITUMENS

Soft deposits constituted of hydrocarbons of complicated composition, often found in association with petroleumas, for example, at Trinidad. They are soluble in carbon disulphide and Russian turpentine, and are largely used for paving purposes, making varnishes, and for lining and cementing watertanks, etc.

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BARYTOCALCITE

A mineral compound carbonate of barium and calcium of the composition BaC03,CaC03.

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BRUNSWICK BLACK

is prepared by melting together asphalt and boiled linseed oil in the proportions of 2 to 1 ant adding two parts of turpentine to the mixture upon cooling.

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BENZOIC ACID

can be obtained in colourless, needleshaped crystals trom gum benzoin by sublimation and occurs naturally in the resins named “dragon

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BRUSHITE

A natural hydrated calcium phosphate 4, 2ll2 found in the guano of Aves Island and Sombrero.

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BOILINGPOINT

The highest temperature at which any liquid can be converted into vapour at the standard pressure of 760 mm. of mercury; or, the temperature at which its vapour pressure is equal to the atmospheric pressure.

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BATHBRICK

Scouring 1 iricks made of calcareous and siliceous earth obtained from deposits at Bridgwater and other places.

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