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Ruhmkorff Expression, Ruhmkorff Soul Urge, Ruhmkorff Inner Dream

Books about Ruhmkorff:
Induction Coils: How to Make, Use, and Repair Them Including Ruhmkorff, Tesla, and Medical Coils, Roentgen Radiography... by Norman Hugh Schneider (Feb 22, 2010)
Induction Coils: How to Make, Use, and Repair Them Including Ruhmkorff, Tesla, and Medical Coils, Roentgen Radiography... by Norman H. Schneider (Jun 29, 2012)
Induction Coils - How to Make, Use, and Repair Them - Including Ruhmkorff, Tesla, and Medical Coils, Roentgen,... by H. S. Norrie (Jan 11, 2010)
Ruhmkorff Induction-coils by Norman Hugh Schneider (Apr 9, 2009)
Ruhmkorff induction coils, their construction, operation and application by Norman H. Schneider (Jan 1, 1896)
The Case of Mrs. Ruhmkorff's Will by Percy Andreae (Dec 5, 2013)
Ruhmkorff's Inductions-apparat U. Die Damit Anzustellenden Versuche: Nach D. François. Original Des H. Th. Du... by Th Du Moncel (Apr 9, 2012)

Wiki information Ruhmkorff:
Heinrich Daniel Ruhmkorff was a German instrument maker who commercialised the induction coil Ruhmkorff was born in Hanover. He changed the "ü" to "u" in his name when living abroad. After an apprenticeship with a German mechanic, he moved to...
15273 Ruhmkorff is a main-belt asteroid discovered on April 8, 1991 by E. W. Elst at the European Southern Observatory.