Number puzzles before the log fire, being those given in the Number stories of long ago.

Mode of access: Internet.

The psychology of efficiency; an experimental study of the processes involved in the solution of mechanical puzzles and in the acquisition of skill in their manipulation,

Vita.

A new and fashionable mosaic puzzle : forming a variety of elegant devices adapted for tesselated pavements &c. &c. &c. /

Title page includes illustration of a pavement under a columned archway; all other ill. are squares with individual black & white geometric designs, except for leaf [9] which contains squares without designs but with guidelines drawn in them.