Strong drink and tobacco smoke : the structure, growth, and uses of malt, hops, yeast, and tobacco / by Henry P. Prescott.

  • Prescott, Henry Paul, active 1868.
Date:
1869
Catalogue details

Licence: Public Domain Mark

Credit: Strong drink and tobacco smoke : the structure, growth, and uses of malt, hops, yeast, and tobacco / by Henry P. Prescott. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    is found to have lost its light colour, to have swollen considerably, and to have become comparatively soft. The water is next drained from the grain, which is now removed to a four-sided rectangular frame (for the purpose of being charged with duty by the revenue officers) to a depth varying from ten to thirty inches. From this frame it is removed in a few hours to the working floor (a level surface of slate, tiles, or stucco), and laid thick and close so as to preserve the heat evolved by germination, which has now actively com- menced. Small white pips will, in a few days, make their appearance at one end of the grain, whilst on its back a raised protuberance underlying the husk will be seen lengthening itself from day to day. It is now the maltster’s special care, by turning the grain on the floor, spreading it thickly or thinly, to regulate its temperature, so as to obtain a thoroughly even growth throughout the floor, a result which is made more certain of attainment by sprinkling the grain with water. When the rootlets extend beyond the grain some half an inch in length, and the plumule extends to about three-fourths of its length (Plate 2, fig. 2) the germination or growth of the grain may be considered sufficiently advanced, and at this stage is arrested by throwing it into a chamber of hot air provided with a tiled floor, perforated with minute holes. The heat of this chamber (the kiln) is maintained by a fire of charcoal, wood, or coke, placed underneath, and is gradually raised as the water escapes from the grain