Items

Items

• 

  [E1365DL], Letter from Zachariah Power Halpin to Miller Reese Hutchison, May 26th, 1913

  1913-05-26
• 

  [E1365EO], Test Report, Zachariah Power Halpin, July 19th, 1913

  1913-07-19
• 

  [E1382BX], Test Report, Zachariah Power Halpin, 1913

  1913-00-00
• 

  [E1464CQ], Test Report, Zachariah Power Halpin, July 6th, 1914

  1914-07-06
• 

  [E1469IM], Letter from Zachariah Power Halpin to Thomas Alva Edison, November 23rd, 1914

  1914-11-23
• 

  [E1469JI], Letter from Zachariah Power Halpin to Thomas Alva Edison, December 7th, 1914

  1914-12-07
• 

  [E1565HE], Letter from Zachariah Power Halpin to Thomas Alva Edison, May 15th, 1915

  1915-05-15
• 

  [E1565NJ], Letter from Zachariah Power Halpin to Thomas Alva Edison, October 1st, 1915

  1915-10-01
• 

  [E1664ADG], Letter from Zachariah Power Halpin to William Henry Meadowcroft, March 9th, 1916

  1916-03-09
• 

  [E1664ADV], Letter from Zachariah Power Halpin to Thomas Alva Edison, March 17th, 1916

  1916-03-17
• 

  [E1664AGE3], Letter from Zachariah Power Halpin to William Henry Meadowcroft, June 15th, 1916

  1916-06-15
• 

  [E1664BDM], Letter from Zachariah Power Halpin to John Pierrepont Constable, October 11th, 1916

  1916-10-11
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  [NB260001], Technical Note, Zachariah Power Halpin, March 14th, 1913

  1913-03-14
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  [NB260002], Technical Note, Zachariah Power Halpin, March 17th, 1913

  1913-03-17
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  [NB260003], Technical Note, Zachariah Power Halpin, March 18th, 1913

  1913-03-18
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  [NB260008], Technical Note, Zachariah Power Halpin, March 19th, 1913

  1913-03-19
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  [NB260009], Technical Note, Zachariah Power Halpin, March 21st, 1913

  1913-03-21
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  [NB260011], Technical Note, Zachariah Power Halpin, March 22nd, 1913

  1913-03-22
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  [NB260012], Technical Note, Zachariah Power Halpin, March 24th, 1913

  1913-03-24
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  [NB260018], Technical Note, Zachariah Power Halpin, April 8th, 1913

  1913-04-08
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  [NB260018A], Technical Note, Zachariah Power Halpin, April 9th, 1913

  1913-04-09
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  [NB260019], Technical Note, Zachariah Power Halpin, April 11th, 1913

  1913-04-11
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  [NB260019A], Technical Note, Zachariah Power Halpin, April 12th, 1913

  1913-04-12
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  [NB260020], Technical Note, Zachariah Power Halpin, April 9th, 1913

  1913-04-09
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  [NB260022], Technical Note, Zachariah Power Halpin, April 14th, 1913

  1913-04-14
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  [NB260022A], Technical Note, Zachariah Power Halpin, April 15th, 1913

  1913-04-15
• No image

  [NB260023], Technical Note, Zachariah Power Halpin, April 16th, 1913

  1913-04-16
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  [NB260023A], Technical Note, Zachariah Power Halpin, April 17th, 1913

  1913-04-17
• No image

  [NB260024], Technical Note, Zachariah Power Halpin, April 18th, 1913

  1913-04-18
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  [NB260024A], Technical Note, Zachariah Power Halpin, April 19th, 1913

  1913-04-19
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  [NB260025] Technical Note, April 1913

  1913-04-00
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  [NB260027], Technical Note, Zachariah Power Halpin, April 16th, 1913

  1913-04-16
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  [NB260027A], Technical Note, Zachariah Power Halpin, April 17th, 1913

  1913-04-17
• No image

  [NB260033], Technical Note, Zachariah Power Halpin, April 24th, 1913

  1913-04-24
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  [NB260037], Technical Note, Zachariah Power Halpin, April 29th, 1913

  1913-04-29
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  [NB260038], Technical Note, Zachariah Power Halpin, April 30th, 1913

  1913-04-30
• No image

  [NB260038A], Technical Note, Zachariah Power Halpin, May 7th, 1913

  1913-05-07
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  [NB260039], Technical Note, Zachariah Power Halpin, May 8th, 1913

  1913-05-08
• No image

  [NB260043], Technical Note, Zachariah Power Halpin, May 13th, 1913

  1913-05-13
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  [NB260054], Technical Note, Zachariah Power Halpin, May 19th, 1913

  1913-05-19
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  [NB260061], Technical Note, Zachariah Power Halpin, May 20th, 1913

  1913-05-20
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  [NB260061A], Technical Note, Zachariah Power Halpin, May 21st, 1913

  1913-05-21
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  [NB260062], Technical Note, Zachariah Power Halpin, May 19th, 1913

  1913-05-19
• No image

  [NB260062A], Technical Note, Zachariah Power Halpin, May 20th, 1913

  1913-05-20
• No image

  [NB260062B], Technical Note, Zachariah Power Halpin, May 21st, 1913

  1913-05-21
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  [NB260068], Technical Note, Zachariah Power Halpin, May 22nd, 1913

  1913-05-22
• No image

  [NB260068A], Technical Note, Zachariah Power Halpin, May 23rd, 1913

  1913-05-23
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  [NB260070], Technical Note, Zachariah Power Halpin, May 1913

  1913-05-00
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  [NB260070A], Technical Note, Zachariah Power Halpin, June 2nd, 1913

  1913-06-02
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  [NB260072], Technical Note, Zachariah Power Halpin, May 1913

  1913-05-00
• No image

  [NB260077], Technical Note, Zachariah Power Halpin, June 1913

  1913-06-00
• No image

  [NB260082], Technical Note, Zachariah Power Halpin, June 5th, 1913

  1913-06-05
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  [NB260084], Technical Note, Zachariah Power Halpin, June 1913

  1913-06-00
• No image

  [NB260105], Technical Note, Zachariah Power Halpin, June 1913

  1913-06-00
• No image

  [NB260109], Technical Note, Zachariah Power Halpin, June 13th, 1913

  1913-06-13
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  [NB260111], Technical Note, Zachariah Power Halpin, June 14th, 1913

  1913-06-14
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  [NB260134], Technical Note, Zachariah Power Halpin, June 24th, 1913

  1913-06-24
• No image

  [NB260143], Technical Note, Zachariah Power Halpin, June 24th, 1913

  1913-06-24
• No image

  [NB260164], Technical Note, Zachariah Power Halpin, June 27th, 1913

  1913-06-27
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  [NB260167], Technical Note, Zachariah Power Halpin, July 2nd, 1913

  1913-07-02
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  [NB260179] Technical Note, Zachariah Power Halpin, June 1913

  1913-06-00
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  [NB260AAA], Technical Note, Zachariah Power Halpin, April 1913

  1913-04-00
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  [NB260AAB], Technical Note, Zachariah Power Halpin, September 29th, 1913

  1913-09-29
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  [NB261] Index, July 1913

  1913-07-00
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  [NB261001], Technical Note, Zachariah Power Halpin, July 15th, 1913

  1913-07-15
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  [NB261001A], Technical Note, Zachariah Power Halpin, July 16th, 1913

  1913-07-16
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  [NB261006], Technical Note, Zachariah Power Halpin, July 18th, 1913

  1913-07-18
• No image

  [NB261007], Technical Note, Zachariah Power Halpin, July 19th, 1913

  1913-07-19
• No image

  [NB261011], Technical Note, Zachariah Power Halpin, July 23rd, 1913

  1913-07-23
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  [NB261011A], Technical Note, Zachariah Power Halpin, July 25th, 1913

  1913-07-25
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  [NB261013], Technical Note, Zachariah Power Halpin, July 29th, 1913

  1913-07-29
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  [NB261017], Technical Note, Zachariah Power Halpin, July 30th, 1913

  1913-07-30
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  [NB261020], Technical Note, Zachariah Power Halpin, July 31st, 1913

  1913-07-31
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  [NB261021], Technical Note, Zachariah Power Halpin, August 1st, 1913

  1913-08-01
• No image

  [NB261023], Technical Note, Zachariah Power Halpin, August 16th, 1913

  1913-08-16
• No image

  [NB261023A], Technical Note, Zachariah Power Halpin, August 19th, 1913

  1913-08-19
• No image

  [NB261024], Technical Note, Zachariah Power Halpin, September 4th, 1913

  1913-09-04
• No image

  [NB261024A], Technical Note, Zachariah Power Halpin, September 10th, 1913

  1913-09-10
• No image

  [NB261025], Technical Note, Zachariah Power Halpin, September 3rd, 1913

  1913-09-03
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  [NB261026], Technical Note, Zachariah Power Halpin, September 4th, 1913

  1913-09-04
• No image

  [NB261029], Technical Note, Zachariah Power Halpin, September 8th, 1913

  1913-09-08
• No image

  [NB261032], Technical Note, Zachariah Power Halpin, September 9th, 1913

  1913-09-09
• No image

  [NB261033], Technical Note, Zachariah Power Halpin, September 8th, 1913

  1913-09-08
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  [NB261033A], Technical Note, Zachariah Power Halpin, September 10th, 1913

  1913-09-10
• No image

  [NB261036], Technical Note, Zachariah Power Halpin, September 12th, 1913

  1913-09-12
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  [NB261039], Technical Note, Zachariah Power Halpin, July 31st, 1913

  1913-07-31
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  [NB261039A], Technical Note, Zachariah Power Halpin, August 1st, 1913

  1913-08-01
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  [NB261039B], Technical Note, Zachariah Power Halpin, August 2nd, 1913

  1913-08-02
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  [NB261040], Technical Note, Zachariah Power Halpin, August 4th, 1913

  1913-08-04
• No image

  [NB261041], Technical Note, Zachariah Power Halpin, August 2nd, 1913

  1913-08-02
• No image

  [NB261041A], Technical Note, Zachariah Power Halpin, August 4th, 1913

  1913-08-04
• No image

  [NB261041B], Technical Note, Zachariah Power Halpin, August 5th, 1913

  1913-08-05
• No image

  [NB261045], Technical Note, Zachariah Power Halpin, August 20th, 1913

  1913-08-20
• No image

  [NB261045A], Technical Note, Zachariah Power Halpin, August 21st, 1913

  1913-08-21
• No image

  [NB261049], Technical Note, Zachariah Power Halpin, August 22nd, 1913

  1913-08-22
• No image

  [NB261051], Technical Note, Zachariah Power Halpin, September 11th, 1913

  1913-09-11
• No image

  [NB261051A], Technical Note, Zachariah Power Halpin, September 25th, 1913

  1913-09-25
• No image

  [NB261061], Technical Note, Zachariah Power Halpin, December 17th, 1913

  1913-12-17
• No image

  [NB261061A], Technical Note, Zachariah Power Halpin, December 24th, 1913

  1913-12-24
• No image

  [NB261080], Technical Note, Zachariah Power Halpin, July 25th, 1913

  1913-07-25