Notes on health in Calcutta and British emigrant ships : including ventilation, diet, and disease / by W.H. Pearse.

  • Pearse, William Henry, 1831-1907.
Date:
1866
Catalogue details

Licence: Public Domain Mark

Credit: Notes on health in Calcutta and British emigrant ships : including ventilation, diet, and disease / by W.H. Pearse. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    11/171 page 2
    their tops with moveable cowl-heads, which can be turned in any direction. I shall endeavour to show, that by attention to the proper adaptation of these simple means, a sufficient ventilation can be obtained; that the true and simple principles on which ventilation depends can be maintained by such arrangements; and that many of the useless, expensive, and pernicious patents which are attempted to be given to emi- grant ships, can be best done without. I have stated that any remarks made in these notes on ventilation, refer to Australian and Cal- cutta emigrant ships, with clear ^tween decks and free hatchways, and not to ships engaged in parti- cular services, where hatches must be shut, or where additional crowding exists, or where small vessels are engaged in tropical river services, &c. Practically, and as a very general rule, emigrant ships are placed under two kinds of circumstances, viz., under way, or sailing from one to ten knots, or about an average of five; and in calms. They also, in every voyage, sail through a tro- pical and cold or temperate climate. The system of ventilation adopted has to meet all these different conditions. During any period that a ship happens to be becalmed the ^tween decks becomes intensely op- pressive. Calms are mostly in the tropics near the equator, and occur often with heavy rains. When becalmed in the tropics, without rain, the ther-
    digitised image 1
    digitised image 2
    digitised image 3