R. Y. Armstrong

Discussion on ¿On some instruments for the measurement of electro-motive force and electrical power¿, by Dr. J.A. Fleming and C.H. Gimingham, Esq., and ¿Portable voltmeters for measuring alternating potential differences¿, by Professors W.E. Ayrton and John Perry

W. E. Ayrton, S. Evershed, James Swinburne, .

Continuation of discussion on Professor Oliver Lodge's paper "On lightning, lightning conductors, and lightning protectors"

W. H. Preece, William Thomson, S. Evershed, .