The advantages of the invention consist in obtaining for the purposes of
daily life a light which is maintained at no cost whatever, is free from
the defects and contingent dangers arising from combustion or heat, and
can be applied in many cases where all other sources of light would be
inconvenient or incapable of application.
Heretofore phosphorus has been mixed with earthy oxides, carbonates,
and sulphates, and with oxides and carbonates of metal, as tin, zinc,
magnesia, antimony, and chlorides of the same, also crystallized acids
and salts and mineral substances, and same have been inclosed and
exhibited in closely-stopped bottles as a phosphorus; but such union I
do not claim; but what I claim is:
A luminous paint, the body of which is a phosphorescent substance, or
composed in part of such substance, the vehicle of which is such as is
ordinarily used in paints, viz., one which will become dry by oxidation
or evaporation, substantially as herein described.
A. Krause, of Buffalo, N.Y., obtained a patent for improvement in
phosphorescent substances dated December 30, 1879. The patentee says:
This invention relates to a substance which, by exposure to direct or
indirect sun-light, or to artificial light, is so affected or brought
into such a peculiar condition that it will emit rays of light or become
luminous in the dark.
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