The Chemistry of Foods: Tea, coffee, cocoa, sugar, etc |
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Page 51
When a few grains of coffee containing chicory are placed on the surface of water in a test - tube or wine - glass , each particle of chicory becomes surrounded by a yellowish - brown - coloured cloud which rapidly diffuses itself in ...
When a few grains of coffee containing chicory are placed on the surface of water in a test - tube or wine - glass , each particle of chicory becomes surrounded by a yellowish - brown - coloured cloud which rapidly diffuses itself in ...
Page 52
This was done by infusing equal quan- tities of each substance in water , as in the preparation of coffee for domestic use , filtering the infusions and observing the colour in glass tubes of about 1 inch in diameter .
This was done by infusing equal quan- tities of each substance in water , as in the preparation of coffee for domestic use , filtering the infusions and observing the colour in glass tubes of about 1 inch in diameter .
Page 59
They mainly consist of a mass of cells , among which occur bundles of jointed tubes , the sides of which present the appearance of being marked with bars or pits . When moistened with water the particles become soft , while COFFEE . 59.
They mainly consist of a mass of cells , among which occur bundles of jointed tubes , the sides of which present the appearance of being marked with bars or pits . When moistened with water the particles become soft , while COFFEE . 59.
Page 60
A represents the pitted tubes , which are present in con- siderable quantity and are highly characteristic . They resemble ( A ) Pitted tubes ... ... magnified 80 diameters . ( B ) Laticiferous tissue ... " " 50 99 ( c ) Cellular tissue ...
A represents the pitted tubes , which are present in con- siderable quantity and are highly characteristic . They resemble ( A ) Pitted tubes ... ... magnified 80 diameters . ( B ) Laticiferous tissue ... " " 50 99 ( c ) Cellular tissue ...
Page 61
The size of the dotted tubes , the peculiar appearance of the B B A B ( A ) Pitted tubes ( B ) Cellular tissues ( c ) Skin ... ... magnified 65 diameters . ... 99 150 99 " " 50 99 joints , and the presence of the laticiferous vessels ...
The size of the dotted tubes , the peculiar appearance of the B B A B ( A ) Pitted tubes ( B ) Cellular tissues ( c ) Skin ... ... magnified 65 diameters . ... 99 150 99 " " 50 99 joints , and the presence of the laticiferous vessels ...
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added addition adulteration albumin alcohol amount analysis appearance applied bean becomes boiling called cane-sugar cells cellulose cent character characteristic chicory cloth cocoa coffee colour composed consists constituents contains copper crystals cubic centimetres Description determined dilute dissolved distilled dried Edition employed estimated ether evaporated examination exhausted extract filtered filtrate given gives glucose grains grams green ground heated husk imported India insoluble known lead leaf leaves less London manufacture matter means method microscope mineral mixed mixture nibs nitrogen obtained oxide percentage plant portion powder precipitate prepared present produced proportion pure quantity removed represented residue roasted roots sample seeds seen separated shown similar skin soluble solution sometimes specific gravity starch structure substances sugar sulphuric acid surface taken tannin theine tissue treated tubes usually weight
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Bibliographic information
| Title | The Chemistry of Foods: Tea, coffee, cocoa, sugar, etc South Kensington Museum science handbooks Part 1 of The Chemistry of Foods: With Microscopic Illustrations, James Bell |
| Author | James Bell |
| Publisher | Committee of Council on Education, 1881 |
| Original from | Oxford University |
| Digitized | 5 May 2006 |
| Export Citation | BiBTeX EndNote RefMan |