"G.F. Hopkins & Son," . . . . "G. & C. Carvill & Co.," . . . . "Electro-magnetism history of Davenport's invention of the application of electro-magnetism to machinery : with remarks on the same from the American Journal of Science and Arts"@en . "History" . "History"@en . . "Electro-magnetism [microform] : history of Davenport's invention of the application of electro-magnetism to machinery : with remarks on the same from the American Journal of Science and Arts" . . "Electro-magnetism : History of Davenport's invention of the application of electro-magnetism to machinery; with remarks on the same from the American journal of science and arts" . . . . . . . "Electro-magnetism History of Davenport's invention of the application of electro-magnetism to machinery; with remarks on the same from the American journal of science and arts" . . . . "Electro-magnetism history of Davenport's invention of the application of electro-magnetism to machinery : with remarks on the same from the American journal of science and arts"@en . . . . . . "Electronic books"@en . . . . .