An essay on saving persons from drowning at the breaking of the ice ; delivered ... on the 19th of January 1814 / [George William Manby].

  • Manby, George William, 1765-1854
Date:
[1814]
Catalogue details

Licence: Public Domain Mark

Credit: An essay on saving persons from drowning at the breaking of the ice ; delivered ... on the 19th of January 1814 / [George William Manby]. Source: Wellcome Collection.

    4/22 (page 64)
    6 4 This boat is rendered unimmergible by air, and is made to stand upright on the ice running upon rollers*. It is to be used when at the breaking of the ice the dis¬ tance is too great for throwing the rope, or when the means at present in use are insufficient to afford relief. The weight of a boat of this nature, will not, I conceive, be more than 16lbs. purpose, but which from its being formed of stronger materials, may, in some particular instances of danger, be preferable. * The roller in the fore part of the boat might easily be made to regulate the direction of the boat, but the sprit answers this end, and all unnecessary complexity is avoided. , f The rullocks or vacancies on the gunwale of this boat are not for the purpose of admitting oars j they are made to receive the frame of the ladder to prevent it slipping. : 4th,