Food Adulteration and Its Detection: With photomicrographic plates and a bibliographical appendixBattershall, Jesse P. (Jesse Park)
Science
Food Adulteration and Its Detection: With photomicrographic plates and a bibliographical appendix
Battershall, Jesse P. (Jesse Park)
Food adulteration and inspection; Food adulteration and inspection -- United States
1. Partially exhausted and refired tea-leaves, known as “_Ching Suey_”
(clear water), which name doubtless has reference to the weakness of a
beverage prepared from this article.
2. “Lie tea,” made from Wampan leaves.
3. A mixture of 10 per cent. green tea and 90 per cent. “lie tea.” It
is sometimes sold as “Imperial” or “Gunpowder” tea, and is stated to be
extensively consumed in France and Spain.
4. “Scented caper tea,” consisting of tea-dust made up into little
shot-like pellets by means of “Congou paste” (_i. e._ boiled rice), and
said to be chiefly used in the English coal-mining districts.
The following are the results of the analysis by American chemists of
samples representing 2414 packages of Indian tea.
Per cent. Average per cent.
Moisture 5·830 to 6·325 5·938
Extract 37·800 „ 40·350 38·841
Total ash 5·050 „ 6·024 5·613
Ash soluble in water 3·122 „ 4·280 3·516
Ash insoluble in water 1·890 „ 2·255 2·092
Ash insoluble in acid 0·120 „ 0·296 0·177
Insoluble leaf 47·120 „ 55·870 51·910
Tannin 13·040 „ 18·868 15·323
Theine 1·880 „ 3·24 2·736
FOOTNOTES:
[4] I.e. the United States.
[5] ‘Chemistry of Foods.’
[6] ‘Tea, Coffee, and Cocoa Analysis.’
[7] The degrees of temperature given in the text refer to the
Centigrade thermometer; their equivalents on the Fahrenheit scale can
be obtained by means of the formula 9/5C.° + 32 = F.°.
[8] In low grade, but unadulterated Congou tea, the extract
occasionally falls so low as 25 per cent.
COFFEE.
Coffee is the seed of the _Caffea Arabica_, indigenous to Abyssinia
and southern Arabia, and since naturalised in the West Indies, Ceylon,
Brazil, and other tropical countries. Its importance as an almost
universal beverage is only equalled by that of tea. The ancient history
of coffee is shrouded in great obscurity. It was unknown to the Romans
and Greeks, but its use is said to have been prevalent in Abyssinia
from the remotest time, and in Arabia it formed an article of general
consumption during the fifteenth century. From its introduction, in
1575, into Constantinople by the Turks, it gradually made its way into
all civilised countries. In 1690 it was carried by the Dutch from Mocha
to Java, whence specimens of the tree were taken to Holland and France.
Coffee houses were opened in London about the middle of the seventeenth
century, and in 1809 the first cargo of coffee was shipped to the
United States. As with many other articles of diet, the adulteration of
coffee has kept well apace with its increased consumption. The bean is
deprived of its external fleshy coatings before exportation, and is met
with in commerce in a raw, roasted, or ground condition. Bell[9] gives
the following analyses of two samples of coffee, both in the raw and
roasted state:--
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