The spinthariscope was invented by William Crookes in England in 1903, and is constructed just as the Morrell’s diagram indicates - housed within a brass tube with a viewing hole at one end and a zinc sulfide screen inside the closed end of the tube at the other. A pencil notation lower margin indicates that the illustration was to be reproduced at 9 inches wide by 3 inches. Given the overall shape, this artwork was probably drawn as the heading of a poster or magazine article. Two illustrations flank the white hand-lettered title “The Way to the Wealth in the Atom.” On the right is a cross section illustration of a “Section of Spinthariscope showing particles being expelled.” Within the apparatus are two lenses on the right end, a small white dot at the top of a needle labeled “Radium” and a spherical form labeled “Atoms striking Zinc-Sulphide disc.” On the left is an illustration of the patterns of light to be observed with the device, captioned, “Alpha particle being expelled from Atom.” The illustrations and lettering are within a solid black rectangle. Original illustration art of a spinthariscope, a scientific instrument for observing the fluorescence that alpha rays from radium produce on a zinc sulfide screen. Signed lower right “G.F.M.” date stamped verso Pen and ink with wash and white gouache on illustration board
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