HOLBROOK, Kennedy.?How? Or Spare Hours Made Profitable for Boys and Girls.?New York: Worthington Co., 1887. Bright green cloth decorated in gilt and black. Patterned endpapers, profusion of engravings. 8vo. Ex-libris Burton Sperber. Old ownership signature, cloth rubbed. An uncommon variant of the often-seen Magical Experiments or Science at Play by Arthur Good (Tom Tit) published in 1894. This earlier volume uses the same stamping on the binding but includes most if not all of the same diversions: puzzles, games, magic tricks, scientific experiments, and the like.