Items

Items

• 

  [CJ601AAB], Letter from Lehigh Portland Cement Co, Charles Arthur Matcham to Francis Robbins Upton, January 20th, 1899

  1899-01-20
• 

  [CJ613ABL], Letter from Lehigh Portland Cement Co, Charles Arthur Matcham to West Orange Laboratory, May 19th, 1905

  1905-05-19
• 

  [D9820AAV], Letter from Lehigh Portland Cement Co, Charles Arthur Matcham to Thomas Alva Edison, December 17th, 1898

  1898-12-17
• 

  [QQ001AAL], Letter from Lehigh Portland Cement Co, Charles Arthur Matcham to Thomas Alva Edison, April 28th, 1904

  1904-04-28