Charles Janin Gold Dredging in the United States

Annotation

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Types of hand drills; Empire drill; New type of light power drill; Determining period of dredging project; Selection of dredge for a given project; Use of unusual type of drill in Alaska; Details of construction of gold dredges; Determining suitable size of dredge; Bucket line and tumblers; Pins; Lower tumbler; Upper tumbler; Main drive; Winches; Ladder-hoist winch; Swing winch; Spuds and spud supports; Hulls and superstructures; Bow gantry; Ladder rollers and bearings; Main hopper, save-all, and bucket idlers; Screen and screen drive; Distributor; Stacker; Belts; Guide rollers; Wire ropes; General details of dredge construction; Special steels for dredge parts; Properties of alloys of steel; Manganese steel; Nickel steel; Nickel-chrome steel; High-carbon steel; Electrical equipment on dredges; Bucket-drive motor; Power consumption by electrical equipment; Recent type of direct-connected motor drive; Kind of electric current used; Voltage of current used on dredges; Rebuilt dredges; Feasibility of moving dredges or machinery; Examples of second use of dredges or machinery; Tin Cup dredge; Scott River dredge; Butte dredge; El Oro No. 1 dredge; Dredge near Leadville, Colo; Castle Creek dredge; Feature to be considered in removal of dredging equipment; Other examples of moving dredge; Operation of gold dredges; Essentials of dredge operation; Ample spare parts should be available