Scope and Contents Used for the accurate clinical determination of haemoglobin and other blood constituents. Wooden box. This absolutely first-class manual photometer appeared around 1950, and was the culmination of a decade's work, led by Professor Earl J King at the Hammersmith (in the meantime he had encouraged many hospital Biochemistry labs to make their own simple photoelectric colorimeters, with major benefits to the quality of their clinical services). The MRC particularly recommended this...