{"@context":"http://iiif.io/api/presentation/2/context.json","@id":"https://edisondigital.rutgers.edu/iiif/2/D8252M/manifest","@type":"sc:Manifest","label":"[D8252M], Letter from George A Hamilton, Western Union to Thomas Alva Edison, August 7th, 1882","thumbnail":{"@id":"https://edisondigital.rutgers.edu/files/medium/D8252M/ck0680.jpg","@type":"dctypes:Image","format":"image/jpeg","width":729,"height":913},"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/D8252M","format":"text/html"},"seeAlso":{"@id":"https://edisondigital.rutgers.edu/api/items/30344","format":"application/ld+json"},"metadata":[{"label":"Title","value":"[D8252M], Letter from George A Hamilton, Western Union to Thomas Alva Edison, August 7th, 1882"},{"label":"Editor's Notes","value":"Re: yours of 24th. Please advise me of weight and cost of your machines most suited for local purposes, ie., working sounders. Also give armature resistance---as low as .01 ohm? Extensive TAE marg: "One of our Z machines could be wound to give say 3 volts. Its resistance would be 1/10,000 of ohm (one ten-thousandths). We have two armatures that are used in our regular Z machines, one of .035 ohm resis giving 55 volts & one of .14 ohm giving 100 volts. 500 lines of 100 ohms each could be worked from this machine........[discusses ft.lbs., elec losses]. Price of regular Z as above $1200 setup.= Current perfectly steady. We also make attachments to commutators whereby you can run several circuits from the same bobbin each having different volts." [might want to consider selecting for this marginalia about prospective new application]"},{"label":"Author","value":["Western Union","Hamilton, George A"]},{"label":"Recipient","value":"Edison, Thomas Alva"},{"label":"Date","value":"1882-08-07"},{"label":"Type","value":"Letter"},{"label":"Subject","value":["Telegraph","Dynamos and generators"]},{"label":"Folder/Volume ID","value":"D8252-F"},{"label":"Microfilm ID","value":"63:694"},{"label":"Document ID","value":"D8252M"},{"label":"URL","value":"https://edisondigital.rutgers.edu/document/D8252M"},{"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":"7 August 1882"},{"label":"Has Version","value":"Archive.org Viewer, Microfilm Series Reel 63"}],"sequences":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/D8252M/sequence/normal","@type":"sc:Sequence","label":"Current Page Order","viewingDirection":"left-to-right","canvases":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/D8252M/canvas/p1","@type":"sc:Canvas","label":"1","thumbnail":{"@id":"https://edisondigital.rutgers.edu/files/medium/D8252M/ck0680.jpg","@type":"dctypes:Image","format":"image/jpeg","width":729,"height":913},"width":729,"height":913,"images":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/D8252M/annotation/p0001-image","@type":"oa:Annotation","motivation":"sc:painting","resource":{"@id":"https://edisondigital.rutgers.edu/iiif/2/205206/full/729,913/0/default.jpg","@type":"dctypes:Image","format":"image/jpeg","width":729,"height":913,"service":{"@context":"http://iiif.io/api/image/2/context.json","@id":"https://edisondigital.rutgers.edu/iiif/2/205206","profile":"http://iiif.io/api/image/2/level2.json"}},"on":"https://edisondigital.rutgers.edu/iiif/2/D8252M/canvas/p1"}]},{"@id":"https://edisondigital.rutgers.edu/iiif/2/D8252M/canvas/p2","@type":"sc:Canvas","label":"2","thumbnail":{"@id":"https://edisondigital.rutgers.edu/files/medium/D8252M/ck0681.jpg","@type":"dctypes:Image","format":"image/jpeg","width":740,"height":972},"width":740,"height":972,"images":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/D8252M/annotation/p0002-image","@type":"oa:Annotation","motivation":"sc:painting","resource":{"@id":"https://edisondigital.rutgers.edu/iiif/2/205207/full/740,972/0/default.jpg","@type":"dctypes:Image","format":"image/jpeg","width":740,"height":972,"service":{"@context":"http://iiif.io/api/image/2/context.json","@id":"https://edisondigital.rutgers.edu/iiif/2/205207","profile":"http://iiif.io/api/image/2/level2.json"}},"on":"https://edisondigital.rutgers.edu/iiif/2/D8252M/canvas/p2"}]}]}]}