SOLD-OUT TICKETS TO "THE STONES" CROOKES, SIR WILLIAM.

Diamonds: A Lecture Delivered Before the British Association, at Kimberley, September 5, 1905. 8vo, original printed orange wrappers, light soiling. London, 1905 first printing of this scarce early pamphlet. It discusses fine colorless diamond crystals imbedded in radium bromide for over a year which assumed a beautiful blue tone, increasing their desirability as a fancy stone. The lecture was so popular and the demand for seats large, that tickets were quite expensive. Sinkankas 1497.