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Effects on pistons and connecting rod of the hammering action of violent detonation in a high compression liberty engine
Press House, Lower Hagley Yard
Unidentified powder yard
Steam plant construction, Hagley Yard
Traction engine designed by Alfred I. du Pont
Charcoal house at unidentified powder yard
Blacksmith shop gate, Hagley Yard
Hydraulic elevator, Hagley Yard
Steam plant in Hagley Yard
Unidentified powder yard
Glaze mill interior, "Big Mary"
Unidentified powder yard construction
Wagon for transporting empty metallic kegs to the mills
Workers' homes at unidentified powder yard
Charcoal house, unidentified location
Unidentified powder yard
Upper Yard, valving and shafting, showing blocks
Engine used in study
Pressure study: normal combustion and detonation time study
Lower Hagley Yard entrance
Employees near press house in Hagley Yard
Looking upstream at Upper Yard
Erecting steam plant in Hagley Yard
Powder workmen
Hydraulic elevator, Lower Hagley Yard

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