最終更新日:2022/12/24

This has now been remedied by enclosing the hatchway within a commodious snow-porch; and, instead of the steam and vapour of the inhabited deck being condensed into moisture about the hatchway as heretofore, it now meets the downward rush of cold air in the porch, and is there converted into minute particles of snow; this porch also diminishes the escape of heat.

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