Hoffmann, Professor, 1839-1919 · London : Frederick Warne · leaf 114
Fig. 169. successive shiftiugs of their relative positions, they may formthe parallelogram/ b, and the eccentric figure, c, in the samediagram. * There is another class of puzzle which goes by the same name—viz.,a square of thin wood cu with a fretsaw iuto a number of segments ofcurved outline,…
Puzzles
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![An illustration from [Collection of German architectural engravings] (1722)](https://img.insideoutlibrary.com/img/200/ia-collectionofgerm00unse-10-20.webp)
![An illustration from Rudiments of the art of building : represented in five sections [...] for the use of architects, builders, draghtsmen, machinists, engineers and mechanics (1853)](https://img.insideoutlibrary.com/img/200/ia-rudimentsofartof00bull-60-25.webp)