View of Simplex automatic arc feeder.
Simplex machine, general view.
Simplex machine.
Simplex machine, general view with rheostat attached.
General view of Simplex machine with new lamp house, from front.
[Simplex projector.]
Simplex Machine Co. Detail of Rheostat.
The Precision Machine Co. View of Simplex machine with new lamp-house and motor control.
Simplex film inspecting machine.
[Gas Arc Lighting.]
Cross Paper Feeder Co.
Broadway and John Street. Automat, detail of entrance.
1918 Exhibit, Madison Square Garden, interior, Simplex projector.