Mechanical and Civil Engineering, Division of [former name], NMAH, SI
0.1 cu. ft.; 0.003 cu. meters
George W. Collins invented an arch support water heater and purifier to be used on boilers in the 1890s and entered into a partnership agreement with John W. Bulla in 1893 for the promotion and marketing of the attachment.
Correspondence, 1894, 1901, 1913; trade literature; patents; legal documents, 1893, 1895; and drawings and blueprints related to the Collins-Bulla partnership for the development and promotion of the C-B Boiler Attachment.