"Tortoise" cast iron solid fuel slow combustion stove, for room heatin g, small model, by C. Portway of Halstead, Essex, 1900-1940 "Tortoise" cast iron solid fuel slow combustion stove 1900-1940
Filters for model 43 smoke stain reflectometer made by Evans Electroselenium Ltd, Halstead. 23 paper filters in total, 21 used, two unsued. filters for smoke stain reflectometer
Model 43 smoke stain reflectometer and filters made by Evans Electroselenium Ltd, Halstead. Model 43 smoke stain reflectometer made by Evans Electroselenium Ltd
Clinical flame photometer, model 150, by Evans Electroselenium Ltd., British, c.1960-1970, with 6 boxes of spares Clinical flame photometer 1960-1970
Chromatograph Scanner; EEL. Serial no.14/1297 Chromatograph Scanner; EEL. Serial no.14/1297 1900-1980
Concentration colorimeter, model 222, by Evans Electroselenium Ltd., British probably c. 1975, with plastic cover Concentration colorimeter 1970-1980
EEL Chloride Meter, complete with extra cuvettes & electrodes & stirrers, operating instruction manual, serial no.92/1704 EEL Chloride Meter 1900-1980
A collection of 1254 glass negatives, approximately 500 contact prints and several items of ephemera associated with the dedicated amateur photographer, Edgar Tarry Adams, 1881-1920. Edgar Tarry Adams Collection 1881-1920
Model 43 smoke stain reflectometer made by Evans Electroselenium Ltd, Halstead. Model 43 smoke stain reflectometer made by Evans Electroselenium Ltd
EEL Spectra Spectrophotometer with operating instruction manual, quotation and calibration EEL Spectra Spectrophotometer with operating instruction manual 1900-1980
Photoelectric Colorimeter EEL, with set of filters and matched test tubes Photoelectric Colorimeter EEL 1900-1980
Spectra flow through absorptiometer, by Evans Electroselenium Ltd., possibly 1962, British Spectra flow through absorptiometer 1962
EEL Photoelectric colorimeter wooden box for glass tubes, containing three tubes EEL Photoelectric colorimeter wooden box for glass tubes 1900-1980
Set of EEL educational modules for assembly into a spectrophotometer, a pH meter, high-sensitivity polarograph or a low-sensitivity polarograph, by Evans Electroselenium Ltd., Halstead, Essex, England, 1965-1975, comprising nine units Set of EEL educational modules for assembly into a spectrophotometer 1960-1979