The "indispensable" bicyclist's handbook; a complete cyclopaedia on the subject (1881)
Sturmey, Henry · Coventry, Iliffe and Son · leaf 37
ANALYSIS OF TtlE MODERN FicycLF. 15 … HUGHES’ ADJUSTABLE ROLLERS. An objection to both these forms is the ease with which dust and grit are able to get in, by falling down between the roller box, crank, and hub of the machine. This is almost entirely obviated in Plowright’s Registered Dust-proof Bearing, in which the rollers are…
Bicycles
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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