Items

• [D7826ZEY], Letter from Howarth Bros to Thomas Alva Edison, November 21st, 1878
  1878-11-21
• [D8756ADY], Letter from Howarth Bros to West Orange Laboratory, October 25th, 1887
  1887-10-25
• [D8756AEX], Letter from Howarth Bros to West Orange Laboratory, November 5th, 1887
  1887-11-05
• [D9230AAA], Letter from Howarth Bros to Thomas Alva Edison, February 3rd, 1892
  1892-02-03