A text-book of diseases of the nose and throat (1904)
Kyle, David Braden, 1863-1916 · Philadelphia ; New York ; London : W.B. Saunders · leaf 42
ner may be attached toone of the many wall-bracketswith or attached topipe, which is secured to theiioor or table by means of abase, the light being placedon a small sliding pipe work-ing within a larger one, andheld in position by meansof a thumb-screw, the jointbeing packed to prevent anyleakage… … Fig. 12.—Phillips electric head-lamp.
