How? or, Spare hours made profitable for boys and girls
A children's handicraft and amusements manual by Kennedy Holbrook, published by Worthington in New York in 1887 for boys and girls making things at home. The 140 figures are plain line diagrams of paper folds, triangles, masts and boat hulls, keyed with italic letters and "Fig." captions, useful as instructional geometry, dotted fold lines and simple constructed-form marks.
