{"@context":"http://iiif.io/api/presentation/2/context.json","@id":"https://edisondigital.rutgers.edu/iiif/2/D8636J/manifest","@type":"sc:Manifest","label":"[D8636J], Letter from John F Ott to Thomas Alva Edison, June 23rd, 1886","thumbnail":{"@id":"https://edisondigital.rutgers.edu/files/medium/D8636J/da1016.jpg","@type":"dctypes:Image","format":"image/jpeg","width":1005,"height":812},"license":"https://creativecommons.org/publicdomain/zero/1.0/","attribution":"Provided by The Thomas A. Edison Papers at Rutgers University","related":{"@id":"https://edisondigital.rutgers.edu/document/D8636J","format":"text/html"},"seeAlso":{"@id":"https://edisondigital.rutgers.edu/api/items/42881","format":"application/ld+json"},"metadata":[{"label":"Title","value":"[D8636J], Letter from John F Ott to Thomas Alva Edison, June 23rd, 1886"},{"label":"Editor's Notes","value":"Here are the results of experiment on discharge of magnet in a bridge [provides diagram; gives info on 6 experiments varying motor speed, closing current on bridge, and "braking" current on bridge]; if the drum is geared even instead of 3 to 1 it gives better curve;###Made Ries Telephone you described for R.R. Tel.; tone about half as loud as tuning fork; points don't "separate enough to make distinct brake," get half the discharge of coil (half EMF).###Making another device for better amplitude,###Made device on phonoplex to prevent operators buckling diaphragm, with lever as you suggested, used a screw, which is best and costs least.###Tate wants me to have Bergmann put this new attachment on phones; have done so unless you countermand."},{"label":"Author","value":"Ott, John F"},{"label":"Recipient","value":"Edison, Thomas Alva"},{"label":"Mentioned","value":["Tate, Alfred Ord","Bergmann, Sigmund"]},{"label":"Date","value":"1886-06-23"},{"label":"Type","value":"Letter"},{"label":"Subject","value":["Research and development","Phonoplex and railroad telegraphy"]},{"label":"Folder/Volume ID","value":"D8636-F"},{"label":"Microfilm ID","value":"79:1056"},{"label":"Document ID","value":"D8636J"},{"label":"URL","value":"https://edisondigital.rutgers.edu/document/D8636J"},{"label":"Rights","value":"Thomas Edison National Historical Park"},{"label":"Publisher","value":"Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University"},{"label":"Timestamp","value":"23 June 1886"},{"label":"Has Version","value":"Archive.org Viewer, Microfilm Series Reel 79"}],"sequences":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/D8636J/sequence/normal","@type":"sc:Sequence","label":"Current Page Order","viewingDirection":"left-to-right","canvases":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/D8636J/canvas/p1","@type":"sc:Canvas","label":"1","thumbnail":{"@id":"https://edisondigital.rutgers.edu/files/medium/D8636J/da1016.jpg","@type":"dctypes:Image","format":"image/jpeg","width":1005,"height":812},"width":1005,"height":812,"images":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/D8636J/annotation/p0001-image","@type":"oa:Annotation","motivation":"sc:painting","resource":{"@id":"https://edisondigital.rutgers.edu/iiif/2/224646/full/1005,812/0/default.jpg","@type":"dctypes:Image","format":"image/jpeg","width":1005,"height":812,"service":{"@context":"http://iiif.io/api/image/2/context.json","@id":"https://edisondigital.rutgers.edu/iiif/2/224646","profile":"http://iiif.io/api/image/2/level2.json"}},"on":"https://edisondigital.rutgers.edu/iiif/2/D8636J/canvas/p1"}]},{"@id":"https://edisondigital.rutgers.edu/iiif/2/D8636J/canvas/p2","@type":"sc:Canvas","label":"2","thumbnail":{"@id":"https://edisondigital.rutgers.edu/files/medium/D8636J/da1017.jpg","@type":"dctypes:Image","format":"image/jpeg","width":564,"height":825},"width":564,"height":825,"images":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/D8636J/annotation/p0002-image","@type":"oa:Annotation","motivation":"sc:painting","resource":{"@id":"https://edisondigital.rutgers.edu/iiif/2/224647/full/564,825/0/default.jpg","@type":"dctypes:Image","format":"image/jpeg","width":564,"height":825,"service":{"@context":"http://iiif.io/api/image/2/context.json","@id":"https://edisondigital.rutgers.edu/iiif/2/224647","profile":"http://iiif.io/api/image/2/level2.json"}},"on":"https://edisondigital.rutgers.edu/iiif/2/D8636J/canvas/p2"}]}]}]}