Abstract
I WONDER if any of your readers could suggest a material which would fulfil the following requirements:—(1) Great cheapness; (2) capability of being readily cast, or moulded, into simple shapes with no delicacy of detail; (3) not very brittle; (4) not fusible under a temperature of 100° F. It should also afford a surface which could be readily painted, and it should not be too heavy, a specific gravity not much in excess of water being the best. India-rubber I find answers all requirements sufficiently well, except that it is much too expensive a material.
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X., M. A Query. Nature 31, 578 (1885). https://doi.org/10.1038/031578d0
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DOI: https://doi.org/10.1038/031578d0
