Method of Making Concrete Tombstones.
Description:
Patent for a method of making concrete tombstones which are waterproof and don't require wetting during the drying process to prevent cracking, reducing the drying time from 30 days in the shade to 4 days in the sun. This is achieved by adding salt to hold water which prevents cracking while drying, and a paint coat of aluminum powder and gasolene to waterproof the concrete and add a shine to it.
Date:
July 2, 1907
Creator:
Hendley, Marion Jonathan
Item Type:
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Partner:
UNT Libraries Government Documents Department