Sperry Rail Service "Dectector Car" SRS#123 at Brooks, ME (MP 12) on the B&MLRR. Developed in 1928 by Dr. Elmer A. Sperry, this motorized car was used to inspect rails, using Sperry's "induction method", to find transverse fissures, split heads, and other invisible defects.

Photographed by Unknown (Digital Restoration By Bruce Cooper).
Added to the photo archive by Bruce Cooper, June 25, 2011.
Railroad: Belfast & Moosehead Lake.

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