Charles H. Aaron,

Having had eighteen years' experience in Mining, Milling and Assaying, offers his services in the following branches:

Examination Of Mines, Erection And Inauguration Of Reduction Works,

Metallurgical Consultations, Selection of Machinery.

The Leaching Processes for the Extraction of Gold, Silver and Copper a Specialty.

Address at N. W. cor. Fourth and Howard streets, San Francisco, Cal.

California Assay Office,

WM. Irelan, Jr.,

(Successor to Mars & Irelan.)

Assayer & Chemist

Rooms 47, 48 And 49 Merchants' Exchange,

California Street, San Francisco.

Analyses of Ores, Minerals, Waters, Etc.

Silver Plated Copper Plates

-Forminers And Quartz Mills.

Furnished To Order

In any quantity and size, at lowest possible rates, and Silver Plating guaranteed

-Atpacific Gold, Silver, Nickel -Andcopper Plating Works,

41 Geary Street, near Dupont.

San Francisco.

W. E. Shepman, - Proprietor.

Table-ware and all kinds of work Re-plated and Repaired.

Send for Circular.

Geo. W. Prescott. Irving M. Scott. H. T. Scott.

Union Iron Works.

Founded 1849.

Office, No. 61 First Street, P. 0. Box 2128.

Cor. First & Mission Sts., San Francisco.

Builders Of

Steam, Air & Hydraulic Machinery

Compounding Condensing Engines,

Automatic Cut-off Engines, Vertical and Horizontal Engines and Boilers, Direct Acting and Geared Hoisting and Pumping Engines and Reels constantly on hand. Air Compressors, Quartz Mill Machinery for Wet and Dry Crushing.

Pans, Settlers, Self-Feeders, Rock Breakers, Retorts, Condensers, Water Jacket Smelting Furnaces, Roasting and Chloridizing Furnaces, Cornish Pumps, and Mill Irons and Castings, of every description, made to order.

Eclipse Amalgamating Pan,

The Best Grinder and Amalgamating Pan yet invented.

Will save much larger percentage of gold and silver than any other Pan in use.

Sole Agents For

Cameron Steam Pumps, Stetefeldt and Brun-ton Roasting Furnaces.

Hinckley, Spiers & Hayes.

(Established in 1855.)

Works, Fremont & Howard Sts. Office, 213 Fremont St

San Francisco.

Hoisting WorksWhims for prospecting small mines; Portable Hoisting Engines and Boilers, with Reels suitable for wire or hemp rope, of new designs, embodying all the latest improvements.

Mining Machinery-Hoisting Cages, with safety attachments, Safety Hooks, Ore Cars, Ore Buckets, Car Wheels and Axles, Ore Gates, with racks and pinions for ore bins, Pumping Machinery, Air Compressors, Air or Water Pipe, Receivers, etc.

Milling Machinery Gold Mills, with pans or concentrators, as required; Silver Mills, either for dry or wet crushing, with roasting and drying furnaces, Pans, Settlers, etc., as required; Smelting Furnaces, for either Lead, Copper, Silver or Gold, Willard Roasting Furnaces, especially adapted for gold ores, Retorts, Bullion Moulds, Ore Feeders, Rock Breakers, etc.

Miscellaneous Machinery Saw Mills, Flour Mills, Oil Well Machinery, Water Wheels and Castings.

Engines and Boilers For any and all purposes, adapted to the economical use of fuel.

Sole Agents for the Pacific Coast for the

Celebrated Deane Steam Pump.

Thompson's Patent Improved

"Howell White" Roasting Furnace,

The Cylinder in this furnace is lined in its entire length, with Fire

Brick; also, if desired, with Thompson's Patent Intermediate Plaster of Paris, or Asbestos Lining, which saves heat, and prevents excessive and unequal expansion and warping of the cylinder; thus saving fuel, both for the roasting and power for rotating the cylinder, and thereby making it and its supporting and rotating gear more durable.

This is the only Boasting furnace which has Thompson's Patent

"Pivot," by which the cylinder alone can be readily inclined, more or less, while working, so as to insure thorough and economical roasting of the most refractory ore.

Thompson's Patent Brick Lining prevents sliding of the ore in the cylinder, tits closely, is easily secured, is lighter and stronger, and, by the rounded form of the "projections" and "recesses," keeps clean, and insures constant showering of the ore through the flames.

Thompson's Patent Balanced or Adjustable "Sole Plates prevent breaking of the cylinder or bearings, resulting from unequal expansion of the cylinder, and consequent unequal distribution of weight; also saving power.

Thompson's Ore-Cooling Pit utilizes the heat of the roasted ore, causes a higher chloridization, saves once handling of the ore, and avoids the nuisance and waste of "wetting down."

These patented improvements, with their completeness of detail and perfect mechanical construction, render this furnace superior to all other inclined cylinder furnaces, which, for this reason, it is rapidly superseding. The number of these furnaces erected, far exceeds that of any other of the class.

The following named mining companies have, in the past five years, erected furnaces containing one or more of the above mentioned features and improvements:

Jefferson, Leopard, Ural, Martin White, Eagle, Endowment, Independence, Wason Cons. Alexander, (2), Raymond & Ely, Columbia Cons. Omega, Bristol, and Paradise Valley, in Nevada.

Peck, Tiger, Bradshaw, Tombstone, Corbin, Isabella, Irene, and Arizona Northern, in Arizona.

Monumental, in Oregon; South Western, in California; Silver Bow, in Montana; Palmetto, in Colorado; Ontario, in Utah; Cilley & Co., in Peru.

And Trinidad, Hormiguera, Plomosas, and Bajada, in Mexico.

Among the last erected, 16 have the Patent Pivot, and some of them the Patent Brick, Plaster lining, etc. See Engraving and description in this book.

Full plans and directions for erecting and operating furnished to purchasers-For circular with full particulars, prices, etc., address

J. M. Thompson,

Pacific Iron Works, San Francisco, Cal.

C A. Hooper.

Geo. W. Hooper.

A. M. Jewell & CO.

Berry Street, between 3d and 4th,

San Francisco.

Manufacture Wooden Tanks for Mills, Reduction Works, Railroads, Etc.

Wooden Pumps and Pipe on hand and made to order. Send for catalogue.

All kinds of House Finish, Mouldings, Brackets, etc. furnished at short notice.

Our proximity to the Central and Southern Pacific Railroad Depot gives us unusual facilities for shipping goods on cars.

John Calvert,

Chemist

Member (by examination) of the Pharmaceutical Society of

Great Britain,

N. W. Cor. Fourth & Howard Sts.

San Francisco, Cal.

Dealer in Drugs and Chemicals, Pharmaceutical Preparations, Perfumeries, Proprietary Medicines, Trusses, and other Surgical Appliances, Sponges, Vaccine, Herbs, Brushes, Combs, Fancy Soaps and Toilet Requisites.

Medicine Chests

Specially fitted up for Mines and Metallurgical Works.

Physicians' Prescriptions, English and Continental, carefully prepared by Experienced Pharmacists.

Sole Proprietor and Manufacturer of the Celebrated Stock Condition Powder, Stock Liniment and Stock Ointment, for Horses and Cattle.

Orders or inquiries by mail or express promptly attended to.