The Chemistry of Foods: Tea, coffee, cocoa, sugar, etcCommittee of Council on Education, 1881 - Food |
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Page 17
... theine is left in a crystalline and almost colourless state . Second Method . - One hundred grains of dried tea are reduced to a powder , and thoroughly exhausted with boiling water . To the extract , subacetate of lead is added as long ...
... theine is left in a crystalline and almost colourless state . Second Method . - One hundred grains of dried tea are reduced to a powder , and thoroughly exhausted with boiling water . To the extract , subacetate of lead is added as long ...
Page 26
... theine . The specific gravity of the filtrate is then taken with a gravity bottle , and the result noted . The best filter for the purpose appears to be one made of flannel , and used double . SPECIFIC GRAVITY OF TEA INFUSIONS Made by ...
... theine . The specific gravity of the filtrate is then taken with a gravity bottle , and the result noted . The best filter for the purpose appears to be one made of flannel , and used double . SPECIFIC GRAVITY OF TEA INFUSIONS Made by ...
Page 43
... theine . Caffeine was discovered in coffee by Runge , in the year 1820 ; by Oudry , in tea in 1827 ; by Martin , in guarana , in 1840 ; and by Stenhouse , in Paullinia , in 1843. Its chemical constitution was settled by Jobst and Mulder ...
... theine . Caffeine was discovered in coffee by Runge , in the year 1820 ; by Oudry , in tea in 1827 ; by Martin , in guarana , in 1840 ; and by Stenhouse , in Paullinia , in 1843. Its chemical constitution was settled by Jobst and Mulder ...
Page 48
... theine " on page 16 . Caffeic or Caffeo - tannic Acid . - One hundred grains of coffee are exhausted with alcohol . The alcohol is evaporated , and to the aqueous residue subacetate of lead is added . The precipitate is thrown on a ...
... theine " on page 16 . Caffeic or Caffeo - tannic Acid . - One hundred grains of coffee are exhausted with alcohol . The alcohol is evaporated , and to the aqueous residue subacetate of lead is added . The precipitate is thrown on a ...
Page 76
... theine , water , mineral matter , cocoa red , and other undefined pro- ducts of the fermentative action to which the cocoa has been subjected . We have obtained the following results from the analysis of a sample of raw Trinidad cocoa ...
... theine , water , mineral matter , cocoa red , and other undefined pro- ducts of the fermentative action to which the cocoa has been subjected . We have obtained the following results from the analysis of a sample of raw Trinidad cocoa ...
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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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