Items

• [D1020ACH], Letter from Alexander Welsh to Thomas Alva Edison, November 25th, 1910
  1910-11-25
• [D8213ZAG], Letter from Alexander Welsh to Thomas Alva Edison, 1882
  1882-00-00
• [N106087], Technical Note, Alexander Welsh, November 20th, 1880
  1880-11-20
• [N106089], Technical Note, Alexander Welsh, November 17th, 1880
  1880-11-17
• [N106105], Technical Note, Alexander Welsh, November 21st, 1880
  1880-11-21
• [N106109], Technical Note, Alexander Welsh, November 26th, 1880
  1880-11-26
• [N106111], Technical Note, Alexander Welsh, November 27th, 1880
  1880-11-27
• [N106112], Technical Note, Alexander Welsh, November 29th, 1880
  1880-11-29
• [N106113], Technical Note, Alexander Welsh, November 30th, 1880
  1880-11-30
• [N106115], Technical Note, Charles Batchelor, Alexander Welsh, December 1st, 1880
  1880-12-01
• [N106119], Technical Note, Alexander Welsh, December 2nd, 1880
  1880-12-02
• [N106125], Technical Note, Alexander Welsh, December 7th, 1880
  1880-12-07
• [N106127], Technical Note, Alexander Welsh, December 8th, 1880
  1880-12-08
• [N106129A], Technical Note, Alexander Welsh, December 9th, 1880
  1880-12-09
• [N106129B], Technical Note, Alexander Welsh, December 13th, 1880
  1880-12-13
• [N106135A], Technical Note, Alexander Welsh, December 15th, 1880
  1880-12-15
• [N106135B], Technical Note, Alexander Welsh, January 1st, 1881
  1881-01-01
• [N106135C], Technical Note, Alexander Welsh, January 4th, 1881
  1881-01-04
• [N106137], Technical Note, Alexander Welsh, January 5th, 1881
  1881-01-05
• [N106139A], Technical Note, Alexander Welsh, January 7th, 1881
  1881-01-07
• [N106139B], Technical Note, Alexander Welsh, January 8th, 1881
  1881-01-08
• [N106143A], Technical Note, Alexander Welsh, January 18th, 1881
  1881-01-18
• [N106143B], Technical Note, Alexander Welsh, January 19th, 1881
  1881-01-19
• [N106146A], Technical Note, Alexander Welsh, January 22nd, 1881
  1881-01-22
• [N106146B], Technical Note, Alexander Welsh, January 25th, 1881
  1881-01-25
• [N106149], Technical Note, Alexander Welsh, January 27th, 1881
  1881-01-27
• [N106150A], Technical Note, Alexander Welsh, January 31st, 1881
  1881-01-31
• [N106150B], Technical Note, Alexander Welsh, February 1st, 1881
  1881-02-01
• [N106151], Technical Note, Alexander Welsh, February 2nd, 1881
  1881-02-02
• [N106152], Technical Note, Alexander Welsh, February 3rd, 1881
  1881-02-03
• [N106153], Technical Note, Alexander Welsh, February 7th, 1881
  1881-02-07
• [N106193], Technical Note, Alexander Welsh, January 24th, 1881
  1881-01-24
• [N106201], Technical Note, Alexander Welsh, December 3rd, 1880
  1880-12-03
• [N106205] Technical Note, January 1881
  1881-01-00