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BELLJAR

A glass jar of bell shape used for covering other vessels and for other purposes.

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BRICKS

are made from clay or the mixture of clay and sand called loam, as also marl, by moulding and baking.

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BLOWPIPES

Appliances for intensifying the heat of flame by blowing air into admixture with the burning gas. As to the character of the blowpipe flame, see Burners.

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BERGAMOT

The yellowishgreen essential oil of the Citrus bergamia, which grows in South Europe. It contains terpenes, has a sp. gr. of o88i to 0885; refractive index, 1465 to 1470; optical rotation +9 degrees to +150; and is used in perfumery.

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BUTYRIC ACID

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BARYTOCALCITE

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

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BACTEROL

A proprietary antiseptic containing formaldehyde associated w

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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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BLOOD ALBUMIN

Prepared from the serum of the blood of animals, finds use in commerce in connection with printing colours on calico fabrics. It is contained in blood to the extent of about oo8 per cent., the serum itself amounting to about 4816 per cent.

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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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