Sub-series 7. Instructional Materials, 1901-1992, undated

Arranged alphabetically by subject, this sub-series contains instructional materials pertaining to a handful of subjects that were of interest to Betz Laboratories, Incorporated and its corporate predecessor W.H. & L.D. Betz. A majority of the materials in this sub-series were created by Betz or its employees. A small number of items not created by Betz or its employees are also present here.

Four editions of the Betz Handbook of Industrial Water Conditioning, Betz Analytical Data bulletins, procedures for testing Betz Remosil water treatment, and the Betz instruction booklet How to Run a Control Water Analysis are preserved in this sub-series. Training course notes kept by W.H. & L.D. Betz employee Donald E. McGarvie are also present in this sub-series. A saturation graph, installation instructions for an unidentified device, and a copy of W.P. Mason’s book Examination of Water are found here as well.