BRADLEYS SCHOOL AIDS. 63 … THE COLOR TOP. At the suggestion of prominent educators we haveprepared a color top, sliowu in the accompanyin<; iUus-tration, consisting of a heavy car(ll)oard disiv altout oneinch and a half in diameter, graduated decimally on itscircumference, a spindle with a friction nut sliding onit, and…
Kindergarten -- Equipment and supplies · Schools -- Equipment and supplies · Color · Trade catalogs -- Schools -- Equipment and supplies
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