To the right you will find writing about Alexander Humphreys by himself or others about him.
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PDF Versions of Humprhreys Book are available here:
Lecture Notes on Some of the Business Features of Engineering Practice (1912)
Lecture Notes on Some of the Business Features of Engineering Practice Part 1905b
Supplement 1 to Lecture Notes on Some of the Business Features of Engineering Practice 1905
ACH Foundation Documents: