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> Permutit water conditioning data book 1956 leatherette
Permutit water conditioning data book 1956 leatherette
Permutit Water Conditioning Data Book, for Practicing Engineers and Those Who Work with Water Conditioning Problems.
Published by the Permutit Company, New York, in 1956. 5th edition.
Smaller (5 X 7 in.), black imitation leather hardcover, with 114 pages of text and illustrations, followed by a 22 page appendix.
A couple of small divets in the exterior were repaired with matching black vinyl filler. The previous owner's name and address are pencilled in on a preliminary page. One page has a tiny edge tear and creases in its bottom corner. Otherwise clean, unmarked, tightly bound. Lots of charts, tables, diagrams, photos throughout.
