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Heading Date Maker Place Materials Inv Num
View Record Magneto-Electric Machine Late 19th Century Unknown Unknown Boxwood?, steel?, brass, velvet. 61523
View Record Magneto-Electric Machine Late 19th Century Unknown Unknown Boxwood?, steel?, brass, velvet. 54945
View Record Experimental Fleming Valve c. 1889 Prof. J.A. Fleming. London Glass, nickel, steel, ebonite, wood. 85593
View Record Fleming Valve c. 1889 Prof. J.A. Fleming. England Glass, nickel, steel, ebonite, wood. 80572
View Record Marconi's Oil Righi Oscillator 1895 Augusto Righi. Bologna, Italy Mahogany, brass, ebonite, celluloid. 21300
View Record Early Small Coherer c. 1895 Guglielmo Marconi. Italy Glass, elastic, copper?, assorted metals. 98899
View Record Marconi's Parabolic Transmitter c. 1896 Guglielmo Marconi. England Wood, copper, ebonite, steel?, brass. 53586
View Record Marconi's Parabolic Receiver c. 1896 Guglielmo Marconi. England Wood, copper, nickel, glass, assorted metals. 31092
View Record Righi Oscillator 1896 Augusto Righi. Bologna, Italy Brass, ebonite, mahogany. 67799
View Record Marconi's Coherer Receiver 1896 Guglielmo Marconi. England Steel, teak, brass, glass, mahogany?, ivory, assorted metals. 86390
View Record Newton Induction Coil 1897 Newton & Co. London Mahogany, brass, ivory?, celluloid, ebonite. 94316
View Record Multiple Oscillator c. 1898 Unknown England Brass, ebonite, mahogany. 32103
View Record 18-Inch Induction Coil 1898 Marconi's Wireless Telegraph Co. Ltd. London Mahogany, brass, ebonite, copper, ivory?, steel. 81193
View Record Grasshopper Send-Receive Morse Key c. 1899 Wireless Telegraph & Signal Company Limited England Brass, ebonite, mahogany. 79280
View Record Early Coherer No 217 c. 1899 Unknown Unknown Glass, copper, nickel, silver, assorted metals. 55585
View Record Early Coherer c. 1899 Unknown Unknown Glass, copper, nickel, silver, assorted metals. 88920
View Record Exhibition Medal Exposition of Electricity And Serious Industry Dated 1899 Unknown Italy Aluminium 72905
View Record Newton Induction Coil c. 1899 Newton & Co. London Mahogany, brass, ebonite, wax, paper, celluloid. 69748
View Record Tuned Transmitter 1899 Guglielmo Marconi. England Wood, glass, brass, assorted metals. 98396
View Record Early Coherer c. 1899 Unknown Chelmsford, England Glass, copper, nickel, silver, assorted metals. 34674

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