Precision Machine Co. View of inserting movement in machine.
Precision Machine Co. Inserting slide [into] slide carrier.
The Precision Machine Co. View of Simplex machine with new lamp-house and motor control.
The Precision Machine Co. Simplex motion picture camera.
Precision Machine Co. Pulling out slide.
View of machine.
Simplex machine, general view.
Universal Draughting Machine Co. Interior of Lidgerwood Manufacturing Co., ledger room.
[View showing use of lead inserts in constructing mausoleum at Woodlawn Cemetery.]
View of pathescope [machine].