On a new system of manufacturing sugar from the cane, and its advantages : as compared with the method generally used in the West Indies : also, some remarks on the best mode of insuring its general and simultaneous introduction into the British colonies / by Henry Bessemer.

  • Henry Bessemer
Date:
[1852]
Catalogue details

Licence: Public Domain Mark

Credit: On a new system of manufacturing sugar from the cane, and its advantages : as compared with the method generally used in the West Indies : also, some remarks on the best mode of insuring its general and simultaneous introduction into the British colonies / by Henry Bessemer. Source: Wellcome Collection.

    33/72 page 29
    will not produce so complete a circulation in the pan, and at the same time do not admit the steam which hangs about their surfaces to pass off so freely as it does from the bars in Mr. Gadsden’s apparatus, and hence much of theii evapoiative power is lost. I have been thus particular in defining the limits which Mr. Schroder has lnmself assigned to his invention, because, to a superficial observer, there may appear some similarity between it and my invention, but which will totally disappear on an investigation of the principles on which my invention is based. An attempt has been made by Mr. Crosley to reduce the temperature at which evaporation takes place in vessels heated by steam, by forcing air to the bottom of such vessels, and allowing it there to escape through numerous small perforations in the pipes. To effect this object, it would be neces- sary to use an air-pump of large dimensions; but it will at once be perceived, that no considerable amount of evaporation could be produced by this means, without a most expensive and cumbrous apparatus. Dalton, by most careful experiment, has ascertained that a cubic foot of dry air can absorb ten grains of water at a temperature of 64° F., and that it then becomes perfectly saturated. Now if Mr. Crosley were to employ a pair of double- acting air-pumps, of one foot in diameter and three
    digitised image 1
    digitised image 2
    digitised image 3