Items

• [D8949AAH], Letter from Walbaum (W.H.) & Co, J W McGenniss to Thomas Alva Edison, January 29th, 1889
  1889-01-29
• [D8949ABA], Letter from Walbaum (W.H.) & Co to West Orange Laboratory, May 10th, 1889
  1889-05-10
• [D8953AAN], Letter from Walbaum (W.H.) & Co to Thomas Alva Edison, February 26th, 1889
  1889-02-26
• [D8953AAO], Letter from Walbaum (W.H.) & Co to West Orange Laboratory, February 28th, 1889
  1889-02-28
• [D8953AAP], Letter from Walbaum (W.H.) & Co to William Kennedy Laurie Dickson, March 6th, 1889
  1889-03-06
• [D8953ABF], Letter from Walbaum (W.H.) & Co to West Orange Laboratory, May 27th, 1889
  1889-05-27
• [D8953ABH], Letter from Walbaum (W.H.) & Co to West Orange Laboratory, June 12th, 1889
  1889-06-12
• [D8953ABJ], Letter from Walbaum (W.H.) & Co to West Orange Laboratory, June 21st, 1889
  1889-06-21
• [D8953ABK], Letter from Walbaum (W.H.) & Co to West Orange Laboratory, June 25th, 1889
  1889-06-25