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Letters from William Crookes to his laboratory assistant, Charles Henry Gimingham

A Practical Handbook of Dyeing and Calico-Printing

Spectrum analysis photgraph: spectrum of iron and radium compared

Material relating to John Spiller

Papers of Sir William Crookes re spectral photography

Letter from William Crookes to Mr Ionides

Laboratory Notebooks of William Crookes

Spectrum analysis photograph entitled: 'Method of standardising reference lines by comparison with iron lines'

Laboratory Weighing Book of William Crookes