Walker, R.C., & T.M.C. Lance,
Title Photoelectric Cell Applications. A practical book describing the uses of photoelectric cells in television, talking pictures, electrical alarms, counting devices, etc.
Publisher London Pitman & Sons 1933
Seller ID 4979
First edition hardback. VG in original blue cloth with gilt titles. Aside from some minor rubbing and light wear, feint marks to endpapers, a very pleasing clean and bright example. 4979