Double-filament incandescent lamps and head lamps as now designed, constructed, and distributed have not sufficiently justified themselves to public or to law-enforcement authorities, according to the author, to warrant their use without some restrictions to assure their performance in accordance with the claims made for them. (See also - discussion p 300-310)
Head-lamp adjusting mechanicms and law enforcement
Soc. Automotive Engrs. -- Jl
Society of Automotive Engineers -- Journal ; 21 , n 3 ; p 289-300
1927
12 pages
8 Figs.
Article (Journal)
English
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