First Edition. 8vo, paged 475-492; G-; grey cover with black print, ink inscription to upper right corner "To Prof R.A. Daly with compliments, G", bumped upper right corner throughout, vertical center crease throughout, back cover has blue library stamp at bottom right, light smudging along center crease and at spine edge; interior has pencil annotation throughout; "Reprinted from the Journal of the Franklin Institute, Vol. 222, No. 4, October, 1936."
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