Mining Equipment from 1930's

S-D Automatic Installations
	Harvey Coal Corporations
S-D Automatic - Door Trailers
	Tandem S-D Automatic-Door Trailers-- Over the Bin.
	Tandem S-D Automatic-Door Trailers-- In action.
	A battery of S-D Automatic Bottom-Dump Trailers.
	S-D Automatic-Door Trailers-- In action.
	Showing a big stripping operating using S-D Automatic Trailers.
	2-door S-D Automatic Trailer in action.
Special Types of Cars
	"Man-Car" For Incline.   Specification: Man-Car. Capacity 60 men.  track gauge 72 inches.   Length overall 22 ft.  Height overall 10 ft.  width overall 11 ft.   Wheels 20 inches.  Axles 4 inches.  Wt. 9900 lbs.
S-D "Automatics" Are In Wide Use
	S-D "Automatics" in Big West Virginia Mine.
	S-D "Automatics" in An Open Pit Mine
	S-D "Whopper Automatics" in Strip Mining.
	S-D "Automatics" in Strip Mine in Kentucky