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MYRTLE or LAUREL WAX

A crystalline hydrated glyceride obtained from the berries of various species of Myrica.

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MOLASOCARB

A decolourant black made by decomposing molasses with lime, burning the mixture, and subsequently washing the char with chemicals to remove the lime salts.

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MORDANTS

Chemical substances used for fixing colours in dyeing and calico printing, the colouring matter being thereby securely attached to the fibres of the material in the form of coagulated or precipitated compounds known as “lakes.”

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MOTHERLIQUOR

The residual liquor after the chief constituent substance has been removed from it as far as possible by deposition or crystallization. For example, codeine being a more soluble substance than morphine, is contained in the motherliquor after the morphine has crystallized out. Bromine is recovered from the motherliquor left from the manufacture of potassium chloride.

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MEASURES

See Burettes, Pipettes, and Weights and Measures.

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MUCINS

A class of glycoproteins which occur in some secretions and yield albumin and carbohydrate upon hydrolysis.

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MUREXIDE

CgH4N60?A purple colouring matter produced from uric acid by moistening with nitric acid and gently warming with ammonia. Its production is a test for the presence of uric acid

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METHYLATED SPIRIT

A mixture of alcohol with 10 per cent, of common woodspirit, tainted with other substances, such as paraffin oil, to render it unfit for consumption, but available for chemical and manufacturing purposes, as an alcoholic solvent and fuel.

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METHYL SaLICYLATE

COO,CII3 The principal constituent of oil of wintergreen. A colourless liquid of sp. gr. 1 185 and boilingpoint 7222 degrees C., soluble in alcohol and ether. Chemically, it is the methyl ester of salicylic acid. The artificial oil of wintergreen is prepared by heating a mixture of methyl alcohol and salicylic acid in presence of sulphuric acid. It is used in medicine, and for flavouring purposes.

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MIRBANE

A tiade name for nitrobenzene as used in perfumery.

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