|Requests that Boys send him some quartz fibres for delicate galvanometer suspension. The ones that Boys had given him are too short for his instrument and he requires 45 centimeter lengths. The degree of thinness in the fibres he has is perfect and he apologises for the trouble. Provides his address at the university, Lausanne in Switzerland.
Pavel Dmitrievich Khrushchev (1849-1909).