Luminous paint.

Manufacturer and builder 4, 1883

Take oyster shells and clean them with warm water, put them into the fire for half an hour; at the end of that time take them out and let them cool. When quite cool, pound them fine, and take away any gray parts, as they are of no use. Put the powder in a crucible in alternate layers with flour or sulphur. Put on the lid and cement with sand made into a stiff paste with beer. When dry, put over the fire and bake for an hour. Wait until wuite cold before opening the lid. The product ought to be white.

Separate all gray parts, as they are not luminous. Make a sifter in the following manner: Take a pot, put a piece of very fine muslin very loosely across it, tie around with a string, put tthe powder into the top, and rake about until only the coarse powder remains; open the pot and you will find a very small powder. Mix into it a thin paint with gum water, as two thin applications are better than one thick one. This will give a paint that will remain luminous far into the night, provided it is exposed to the light during the day.