Guy Hubbard was a Vermont historian who wrote extensively during the 1920s about industrial history. Much of his work was published in American Machinist Magazine, as well as other independent publications.
The Museum of Our Industrial Heritage has reproduced for the web his organizational chart of the industrial pioneers and their businesses created along the Connecticut River Valley. You may recognize many of the historic names listed.
Click on the image above to view this full PDF document in a new window.