{"@context":"http://iiif.io/api/presentation/2/context.json","@id":"https://edisondigital.rutgers.edu/iiif/2/MB069/manifest","@type":"sc:Manifest","label":"[MB069], Letter from Thomas Alva Edison to Charles Batchelor, June 19th, 1882","thumbnail":{"@id":"https://edisondigital.rutgers.edu/files/medium/MB069/dn0420.jpg","@type":"dctypes:Image","format":"image/jpeg","width":759,"height":932},"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/MB069","format":"text/html"},"seeAlso":{"@id":"https://edisondigital.rutgers.edu/api/items/96619","format":"application/ld+json"},"metadata":[{"label":"Title","value":"[MB069], Letter from Thomas Alva Edison to Charles Batchelor, June 19th, 1882"},{"label":"Editor's Notes","value":"[unsigned TAE autograph letter] "In putting up large installations & for that matter small installations look out for the drop of pressure. Our tables are made for a loss of 5 percent. This is 5 volts now a difference of 5 volts will make the lamp at the machine say 16 candles & the last lamp 6 candles or 25 or 30 candles at the machine and 16 on the last lamp. We have changed that here. We only allow 2 percent loss from the 1st lamp to the last, and make the loss 5, 8, or even 12 percent on the wire leading from the machine, according to circumstances. [diagram] The conductor leading from the machine having no lamps on any difference don't effect while the current on which the lamps are having but 2 volts fall the difference in candle power is not noticeable. Now in your large installations you must look sharp after this and I think in most places you will have to calculate for a loss of 2 percent on the tubes carrying the lights and twn to 12 percent on your feeder, thus: [diagram] [continues another paragraph {annotate with longer, more detailed Insull letter 820810 LB007871}"},{"label":"Author","value":"Edison, Thomas Alva"},{"label":"Recipient","value":"Batchelor, Charles"},{"label":"Date","value":"1882-06-19"},{"label":"Type","value":"Letter"},{"label":"Subject","value":["Incandescent lamp","Central stations","Electrical distribution system"]},{"label":"Folder/Volume ID","value":"MB05-F"},{"label":"Microfilm ID","value":"92:430"},{"label":"Document ID","value":"MB069"},{"label":"URL","value":"https://edisondigital.rutgers.edu/document/MB069"},{"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":"19 June 1882"},{"label":"Has Version","value":"Archive.org Viewer, Microfilm Series Reel 92"}],"sequences":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/MB069/sequence/normal","@type":"sc:Sequence","label":"Current Page Order","viewingDirection":"left-to-right","canvases":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/MB069/canvas/p1","@type":"sc:Canvas","label":"1","thumbnail":{"@id":"https://edisondigital.rutgers.edu/files/medium/MB069/dn0420.jpg","@type":"dctypes:Image","format":"image/jpeg","width":759,"height":932},"width":759,"height":932,"images":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/MB069/annotation/p0001-image","@type":"oa:Annotation","motivation":"sc:painting","resource":{"@id":"https://edisondigital.rutgers.edu/iiif/2/274564/full/759,932/0/default.jpg","@type":"dctypes:Image","format":"image/jpeg","width":759,"height":932,"service":{"@context":"http://iiif.io/api/image/2/context.json","@id":"https://edisondigital.rutgers.edu/iiif/2/274564","profile":"http://iiif.io/api/image/2/level2.json"}},"on":"https://edisondigital.rutgers.edu/iiif/2/MB069/canvas/p1"}]},{"@id":"https://edisondigital.rutgers.edu/iiif/2/MB069/canvas/p2","@type":"sc:Canvas","label":"2","thumbnail":{"@id":"https://edisondigital.rutgers.edu/files/medium/MB069/dn0421.jpg","@type":"dctypes:Image","format":"image/jpeg","width":741,"height":932},"width":741,"height":932,"images":[{"@id":"https://edisondigital.rutgers.edu/iiif/2/MB069/annotation/p0002-image","@type":"oa:Annotation","motivation":"sc:painting","resource":{"@id":"https://edisondigital.rutgers.edu/iiif/2/274565/full/741,932/0/default.jpg","@type":"dctypes:Image","format":"image/jpeg","width":741,"height":932,"service":{"@context":"http://iiif.io/api/image/2/context.json","@id":"https://edisondigital.rutgers.edu/iiif/2/274565","profile":"http://iiif.io/api/image/2/level2.json"}},"on":"https://edisondigital.rutgers.edu/iiif/2/MB069/canvas/p2"}]}]}]}