The Chemistry of Foods: Tea, coffee, cocoa, sugar, etcCommittee of Council on Education, 1881 - Food |
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Page 21
... grains of the dry and finely- powdered tea are left in contact with ether for twenty - four hours . The ether is passed through a filter , and the tea - powder washed with warm ether . The filtrate is evaporated to dryness , and treated ...
... grains of the dry and finely- powdered tea are left in contact with ether for twenty - four hours . The ether is passed through a filter , and the tea - powder washed with warm ether . The filtrate is evaporated to dryness , and treated ...
Page 23
... grains of quartz have been simply coloured with plumbago or other substance , and so made to closely resemble some kinds of genuine caper tea , with which they have been mixed . Magnetic oxide , sometimes referred to in the trade as ...
... grains of quartz have been simply coloured with plumbago or other substance , and so made to closely resemble some kinds of genuine caper tea , with which they have been mixed . Magnetic oxide , sometimes referred to in the trade as ...
Page 25
... can be done , the results of an analysis of them would no doubt be conclusive . Usually it is necessary to weigh out a given quantity — say 100 grains — of the tea , and after repeated extraction with boiling water , TEA . 25.
... can be done , the results of an analysis of them would no doubt be conclusive . Usually it is necessary to weigh out a given quantity — say 100 grains — of the tea , and after repeated extraction with boiling water , TEA . 25.
Page 26
... grains of tea are finely powdered in a mortar , and introduced into a flask with 2,000 grains of water at 60 ° F. ( 15.5 ° C. ) , and raised to the boiling - point over an argand burner . After this point has been reached , it is ...
... grains of tea are finely powdered in a mortar , and introduced into a flask with 2,000 grains of water at 60 ° F. ( 15.5 ° C. ) , and raised to the boiling - point over an argand burner . After this point has been reached , it is ...
Page 31
... grains of the tea are incinerated and reduced to an ash in a platinum capsule . The ash is treated with boiling water , filtered , and the insoluble part dried , ignited , and weighed . The alkalinity of the soluble part may then be ...
... grains of the tea are incinerated and reduced to an ash in a platinum capsule . The ash is treated with boiling water , filtered , and the insoluble part dried , ignited , and weighed . The alkalinity of the soluble part may then be ...
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Common terms and phrases
250 cubic centimetres Acorns added adulteration albumin alcohol alkaloid analysis appearance bean benzol berries boiling water caffeic acid Caffeine cane caramel cells cellulose cent centimetres of water chemists chicory cloth cocoa cocoa nibs coffee cold water colouring matter Congou consists constituents contains copper crown 8vo crystals cubic centimetres Demy 8vo dextrin dextro-glucose dilute dissolved distilled dried estimation ether evaporated exhausted leaves Fehling's fermentation filtered filtrate glucose grains grams granules green tea husk India infusion insoluble invert-sugar kernel laticiferous laticiferous tissue leaf magnesia mangold wurzel manufacture mineral matter mixture nitrogen obtained Orange Pekoe oxide Parsnips percentage of ash portion potash powder precipitate prepared present proportion Prussian blue pure cane-sugar raw sugar removed roasted sample of coffee seeds Silica skin soluble in water solution Souchong specific gravity starch sulphuretted hydrogen sulphuric acid tannic acid tannin temperature theine theobromine Trinidad vegetable substances weight wurzel
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