Perkins, Henry, 1803-1889, publisher, Haswell, Barrington, and Haswell, printer, McManus-Young Collection (Library of Congress) DLC · Philadelphia : H. Perkins, 134 Chestnut Street · leaf 174
ILLUSIONS OF TOUCH. … Jpply the points of a pair of compasses, distantfrom each other one or two lines, to the cheek,just before the ear; then move them succes-sively to several other parts of the cheek, andyou will find, on approaching the mouth, thatthe points will appear to recede from eachother; this effect being…
Scientific recreations
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