Columbia subject headings:
Engineers--Connecticut--New Haven.
Inventors--Connecticut--New Haven.
Public utilities--Connecticut--New Haven.
Yale University. Sheffield Scientific School.
Harvard subject headings:
Engineers--Connecticut--New Haven.
Inventors--Connecticut--New Haven.
Public utilities--Connecticut--New Haven.
Yale University. Sheffield Scientific School.
Princeton subject headings:
Engineers--Connecticut--New Haven.
Inventors--Connecticut--New Haven.
Public utilities--Connecticut--New Haven.
Yale University. Sheffield Scientific School