Dissecting microscope and preparator's kit by Field and Company, Birmingham, 1850-1900 Dissecting microscope and preparator's kit by Field and Company
Watkins exposure meter, made by R. Field and Co. Birmingham. Cylindrical form; pendulum cap. Actinometer from carrying long strip of sensitive paper under tinted disc. Calculator on body - 6 scales, 4 rotating, two fixed. Watkins Exposure Meter