Invitation for proposals to furnish steam shovels, steam churn drills; air compressor plant, including air compressors, air receivers, boilers, steel rack, smoke box, pumps, compound engine and 100-kilowatt generator, induction motors, transformers, rock drills and equipment, steel rails, splice bars, tie plates, track bolts and spikes, frogs, switches, switch stands, steel, iron, rivets, wrought-iron pipe, drilling ladles, safes, steam whistles, steam traps, wheelbarrows, water coolers, rubber sleeves for suction dredge, canvas belting, manila rope, boiler compound, red lead, borax, cross-ties, piles, lumber, et cetera.