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microscope poster
Large paper poster, on wooden baton, of the Cooke Research Microscope, detailing the workings and light paths in it.
Ammeter
synthetic inslated box with leather strap; glass-plated scale on front; top scale reads 0-100 milliamps; bottom scale reads 0-50 amps; face plate stamped Crompton and Co Chelmsford; two terminals on top
ammeter
Wooden handled inductive ammeter 0 - 20 A. Scaled marked "D.C.- A.C." but induction will only work on AC
