1955 The U K B G Guide to Drinks (2nd edition revised)

MINERALS, CORDIALS, SYRUPS & SQUASHES essences, {a)from materials of natural origin,(&) compound essences, and (c) synthetic essences. It is not intended to go into the details of manufacture here, but one of the most important things is the purity of materials and the sterility of all equipment associated with the manufacture. All reputable manufacturers take the greatest care in ensuring the purity of their products and sterihty of the containers, etc.

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