NY commercial/manufactory gas users survey results (marked "Book 4") List of questions with tabulated results. Fr 597 begins questions about steam engines, requirements for HP, machines in use, etc. Fr 606 begins Book No 2; fr 615 book 3; fr 623 Book 5
[N120-F] Notebook Series -- Menlo Park Notebooks
https://edisondigital.rutgers.edu/document/N120027
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Archive.org Viewer, Microfilm Series Reel 37