E. H. Loomis
Phys. Rev. (Series I) 9, 257 (1899) - Published 1 November, 1899
Henry S. Carhart and Karl E. Guthe
Phys. Rev. (Series I) 9, 288 (1899) - Published 1 November, 1899
Ernest Merritt
Phys. Rev. (Series I) 9, 294 (1899) - Published 1 November, 1899
Paul Saurel
Phys. Rev. (Series I) 9, 300 (1899) - Published 1 November, 1899
O. A. Gage and H. E. Lawrence
Phys. Rev. (Series I) 9, 304 (1899) - Published 1 November, 1899
