[D8239U], Letter from Edward Hibberd Johnson to Thomas Alva Edison, February 13th, 1882


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[D8239U], Letter from Edward Hibberd Johnson to Thomas Alva Edison, February 13th, 1882

Editor's Notes

Working 8 machines at Crystal Palace; 2 get quite warm with 64 lamps, others cool; will substitute newer ones. Want to have 12 machs running 70 lamps each 5 hours every night. Trying to find way to get data on Siemens machs. Hopkinson has approached Siemens about armature matter; we're prepared to pay royalty if he's amenable, otherwise we'll fight Siemens. Think we'll make a deal for royalty or manufacturing contract. Expect Siemens, others, will want to use your pat for regulating by dynamo field coil strength. Want some high cp lamps for Cryst. Pal. exhibit. Thought your big machine would give 10 lamps per hp but now you say only 6.75--will disappoint out people. Savoy Theater lighting not successful; uses "prodigious" amount of power for 1200 lamps. Thanks for your new info about Maxim light; they're not doing much anyway. "It is impractical to have any surveillance of the Swan lamps. The only place where it would be at all posible would be at the Savoy Theatre, and that of courseis out of the questino since it could only be accomplished by the command of the manager who is himself in America." We're running 500+ lamps at CP, no one else has more than 50. Long description of layout of TAE exhibit (not just light) at CP. All other exhibitors merely "dropping along in our footsteps and there are but few crumbs of comfort for them to pick up." PS hear you may be invited to England. With Holborn and CP running, a visit here would "be money in your pocket." May participate in series of electrical lectures, after Sylvanius Thompson, Siemens, Swan, Lane-Fox.




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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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