VOLUME XXX NO. 7 - Mines Magazine - Colorado School of Mines

ADVERTISERSAINSWORTH & SONS, INC., WM.Denver, Colo,, 2151 Lawrence St.AJAX FLEXIBLE COUPLING COMPANYWestfield, N. Y., 135 Englisli St.Denver, Colo., 150^ Wynfcoop St.APACHE EXPLORATION COMPANYHouston, Texas, P. O. Box 1711APACHE POWDER COMPANYBenson, Arizona.Los Angeles, Calif., 411 W. Sth St.BUELL & CO., T. HDenver, 14lh & Stout Sla.CAPABILITY EXCHANGEDenver, Colo., 734 Cooper Buiiding.CARD IRON WORKS COMPANY, C. S. 375Denver, Colo., 2501 West 16th Ave.CABNIE-GOODWIN-PENDLETONCOMPANYFresno, Calif., 2126 Inyo SI.Sdctomento, Calil., 515 L St.CHIKSAN OIL TOOL COMPANY, LTD.Fullerton, Caltlornia.Houston, Texas, Shell Buildinq.CLIMAX MOLYBDENUM COMPANYNew York, N. Y., 500 Fifth Ave.CLINTON & HELD COMPANYDenver, Coio., 1637 Wazee Street.COCKS-CLARK ENGRAVING CO. 336Denver, Colo., 2200 Arapahoe StCOLORADO B. P. 4 SUPPLY CO. 369Denver, Colo., 1340 Glenarm Place.COLORADO CENTRAL POWER COMPANYGolden, Colo.COLORADO FUEL 4 IRONCORPORATION 338AmariUo, Texas, 711 Oliver Eakle BldgButle, Mont., 508 Metal Bank Bldg,Chicago, IU„ 309 Railway Exch. BldgDenver, Colo., Continenlal Oil BldgEl Paso, Texas, 801 Basset Tower BldqFt. Worth, Tex., 1503 Ft. Wth. Nat'l BkBldg.Kansas City, Mo., 415 R. A. Long BldqLincoln, Nebr,, 330 N. 8th St.Los Angeles, Calif., 739 E. 60th StOkla, City, Okla., 906 Colcord BldgPortland, Oregon, 902 Porter BldgSalt Lake City, Utah, 604 Walker BkBldq.San Francisco, Calif., 1245 Howard StSpokane, Wash., 727 Old Nat'l Bk.Bld^.Wichita, Kans., 420 S. Commerce StCOLORADO IRON WORKS COMPANY 380Denver, Colo., 1624 Seventeenth St.Kingston, Ontario, Can., CanadianLoco. Wks. Co.Vancouver, B. C, Can., VancouverIron Wks., Ltd.Manila, P. I., Marsman Trading Corp.Johannesburg, So. Africa, Head,Wrightson & Co.Stockton on Tees, Eng., Head,Wrightson & Co.Granville, N. S. W., The Clyde Eng.Co., Ltd.COLORADO NATIONAL BANKDenver, Colo,, 17lh St. at Champa.COLORADO SOCIETY OF ENGINEERSDenver, 525 Cooper Bldg.COLORADO TRANSCRIPTGolden, Colo.COORS PORCELAIN COMPANYGolden, Colo.CROW, WILLIAM 369DEISTER CONCENTRATOR COIMPANYFort Wayne, Ind,, 911 Glasgow AvoNew York, N. Y., 104 Pearl St.Nesquehoning, Pa., 231 E. CatawissaEt.Hibbing, Minnesota, P. O. Box 777.Birminghani, Alabama, 930 2nd AveNorth.DENVER EQUIPMENT COMPANY 336Denver, Colo., 1400-1418 17lh StreetNew York City, 50 Church St.Salt Lake City, Ul., 725 Mclntyre BldgMexico, D. F., Mexico, Boker Building.Toronlo, Ont., 45 Richmond St. WestLondon, Eng., 840 Salisbury HouseE. C. 2.Johannesburg, So. Africo, 18 BonAccord House.DENVER FIRE CLAY COMPANY 379Denver, Colo.Salt Lake City, Utah, P. O. Box 836El Paso, Texas, 209 Mills Bldg.DOLPH COMPANY, INC., THENewark, N. J., 168 Emmef St.Denver, Colo., 1501 Wynkoop St.DORR COMPANY, Inc., EngineersNew York, 570 Lexington Ave.London, England, Dorr-Oliver Co., Ltd.Melbourne, Australia, Crossle & DuffPly., Ltd.Buenos Aires, Argentina, Luis Fiore.Rio de Janeiro, Brazil, Oscar Taves &Co.Chicago, 111., 221 N. LaSalle St.Los Angeles, Calif., 811 W. Seventh St.Denver, Colo., Cooper Building.LISTINGSDUNLAP AND BRUMMETTSan Gabriel, Calif., 592 No. SanMarino Ave.DUPONT de NEMOURS & COMPANY, E. I.Denver, Colo., 444 Seventeenth St.Wilmington, Delaware.San Francisco, Calif., Ill Sutfer StDUVALL-DAVISON LUMBER COMPANYGolden, Colorado.EATON METAL PRODUCTS COMPANY 336Denver, Colo., 4800 York St.EIMCO CORPORATION, THEChicago, 111., 333 No. Michigan Ave.El Paso, Texas, Mills Bidg.New York, N. Y., 330 W. 42nd Si.Sacramento, Calif., 1217 7lh St.Salt Lake City, Utah.FLEXIBLE STEEL LACING CO. 335Chicago, 111., 4628 Lexington St.FOSS DRUG COMPANYGolden, Colorado.FRANCO-WYOMING OIL COMPANY 337Los Angeles, Calif., 601 Edison Bldg.Paris, France, 17 BoulevardMalesherbes.FROBES COMPANY, DANIEL C.Sail Lake City, Utah, Dooly Bidg.GARDNER-DENVER COMPANYQuincy, Illinois.Denver, Colorado.Butte, Mont., 215 E. Park St.EI Paso, Texas, 301 San Francisco St.Salt Lake Cily, Utah, 130 West 2ndSouth.Los Angeles, Calif., 845 E. 61si St.San Francisco, Calif., 811 Folsom StSeattle, Wash,, 514 First South.GATES RUBBGER COMPANYChicago, III., 1524 South Western Ave.Denver, Colo., 899 South Broadway.Hoboken, N. J., Terminal Building.Dallas, Texas, 2213 Griffin St.Birmingham, Ala., 1631 1st Ave. S.Portland, Ore., 1231 N. W. Hoyt St.Los Angeles, Calif., 741 Warehouse St.San Francisco, Calif., 2700 16th St.GENERAL ELECTRIC COMPANYSchenectady, New York.GOLDEN CYCLE CORPORATION 337Colorado Springs, Colo., P. O. Box 86.GOLDEN FIRE BRICK COMPANY 337Golden, Colorado.Denver, Colo., Interstate Trust Bldg.GOODMAN MANUFACTURING COMPANYBirmingham, Ala., 1600 2nd Ave. S.Chicago, 111., Halsted St. at 481h.Denver, Colo., 704 Denver Natl, Bldg.Huntington, West Va., 831 2nd Ave.Pittsburgh, Pa., 1714 Liverpool St.St, Louis, Mo., 322 Clark Ave.Salt Lake Cily, Utah, 314 Dooly Bldg.Wilkes-Barre, Pa., 35 New Bennett St.GREAT WESTERN DIVISION, THE DOWCHEMICAL COMPANYSan Francisco, Calif., 9 Main St.Pittsburg, Calif., Plant.New York, 1775 Broadway.El Paso, Texas, H. I. Barron Co.GRIMES PIPE & SUPPLY COMPANYDenver, Colo., 1300 Larimer St.GULF OIL CORPORATIONPittsburgh, Pa., Gulf Bldg.HANWUM DRILLING COMPANY .Wichita, Kansas, Ellis Singleton Bldg.HARDESTY MANUFACTURING COMPANY,THE RDenver, Colo., 3063 Blake Si.HEILAND RESEARCH CORPORATIONDenver, Colo., 700 Club Building.HENDRIE & BOLTHOFF MFG. 4 SUPPLYCOMPANY _Denver, Colo.HERTEL CLOTHING CO. .. .Golden, Colo.HuAHT COMPANY. THEPeoria, 111., 206 Parkside DriveINGERSOLL-RANDBirmingham, Ala., 1700 Third Ave. So.Bulfe, Mont., 845 S. Montana St.Chicago, 111., 400 W. Madison SI.Denver, Colo., 1B37 Blake St.El Paso, Texas, 1015 Texas St.Kansas City, Mo., 1006 Grand Ave.Los Angeles, Calif., 1460 E. 4fh St.Manila, P, I., Earnshaws Docks &Honolulu Irjn Works.New York, N. Y., 11 BroadwayPittsburgh, Pa., 706 Chamber ofCommerce Bldg.Salt Lake City, Utah, 144 S. WTemple St.San Francisco, Calif., 350 Brannan StSeattle, Wash., 526 First Ave. So.Tulsa, Okla., 319 E. 5lh SI.JEFFERSON COUNTY REPUBLICAN, THEGolden, Colorado.KENDRICK-BELLAMY COMPANY 337Denver, Colo., 301 Sixteenth SI.KIDDE & COMPANY, WALTERNew York, N. Y., 140 Cedar St.Denver, Colo., 1501 Wynkoop Et.KISTLER STATIONERY COMPANY 379Denver, Colo.LETTER SHOP, INC 337Denver, Colo., 509 Railway'Exch' Bldq'LINK-BELT COMPANY ^ 335Chicago, 111., 300 W. Pershing Rd".Atlanta, Ga., 1116 Murphy Ave S WIndianapolis, Ind., 220 S. Belmont Ave'San Francisco, Calif., 400 Paul AvePhiladelphia, Pa., 2045 W. HuntingtonPark Ave.Denver, Colo., 521 Boston Bldg.Toronto, Can., Eastern Ave. & Leslie St.LUFKIN RULE COMPANYSaginaw, Michigan.New York, 106 Lafayette St.Windsor, Ontario, Canada.MARSMAN AND COMPANY, INCManila, P. 1., Marsman Bldg.McFARLANE-EGGERS MCHY. CO.Denver, Colo., 2763 Blake SI.MECO ASSAYERSLos Angeles, Calif., 417 So. HiU St.MERRICK SCALE MANUFACTURINGCOMPANYPassaic, New Jersey,MINE & SMELTER SUPPLY COMPANY 377Denver, Colo.Sail Lake City, Utah, 121 W. 2nd South.El Paso, Texas, 410 San Francisco SI.San Francisco, Calif., 369 Pine St.Seattle, Wash., 419 Ry. Exch. Bldg.New York City, 1775 Broadway.Montreal, Canada, Vickers, Ltd.Manila, Philippines, Edw. J. Nell Co.Santiago, Chile, W. R. Judson.MINES REGISTER _ . 334MORSE BROS. MACHINERY COMPANY 334Denver, Colo., 2900 Broadway. P. 6Box 1708.New York City, 1775 Broadway.MOUNTAIN STATES TELEPHONE &TELEGRAPH CODenver, Colo., Mth & Curtis Sts.NATIONAL FUSE & POWDER COMPANY.... 336Denver, Colo.NATIONAL TRAILWAYS SYSTEM 367Denver, Colo., 501 17th Street.OIL CENTER TOOL COMPANYHouston, Texas,New York, Val R. Wittich, Jr., 30Rockefeller Plaza.OXFORD HOTEL _ __ 366Denver, Colo.PARAMOUNT EQUIPMENT COMPANYTulsa, Okla., 911 East First St.Denver, Colo., 1501 Wynkoop St.PARKER & COMPANY, CHARLES O. 337Denver. Colo., 1901 Lawrence St.PHILIPPINE MINING YEAR BOOKManila, P. I., P. Q. Box 297.PICK PHOTOGRAPH 4 BLUE PRINTCOMPANYDenver, Colo., 1015 Seventeenth St.PORTABLE LAMP 4 EQUIPMENTCOMPANY_Pittsburgh, Penna., 72 First Ave.Denver, Colo., 1501 Wynkoop St.PRICE COMPANY, H. CBartiesville, Okla.Loa Angeles, Calif.Son Francisco, Calif.PROFESSIONAL CARDS . 369PUBLIC SERVICE COMPANY OFCOLORADODenver, Colo., Gas & Electric Bldq.ROBINS CONVEYING BELT COMPANY 377Hew York, N. Y., 15 Park Row.ROBINSON'S BOOK STOREGolden, Colo.ROEBLING'S SONS COMPANY, JOHN A.Trenton, N. J.RUTH COMPANY _ 336Denver, Colo., Continental Oil Bidg.SALT LAKE STAMP COMPANYSail Lake City, Utah, 65 W. Broadway.SECURITY ENGINEERING COMPANYWhittier, California.Houston, Texas, 5525 Clinton Dr.New Iberia, La., P. O. Box 121.New York Cily, 420 Lexington Ave.SOUTHERN COLORADO POWER CO.Pueblo, Colo.STEARNS-ROGEH MFG. COMPANYDenver, Colo,, 1720 California St.SWEENEY CONSTRUCTION COMPANY,EDWARD LDenver, Colo., United Stales Nail. aidq.TEXAS CO., THENew York City, 135 E. 42nd St.Denver, Colorado, University Bldg.2229 Warehouses in principal cities.UNITED GEOPHYSICAL COMPANYPasadena, Calif., 159 North HiU St.URQUHART SERVICEDenver, Colo., 1501 Wynkoop St.VULCAN IRON WORKS „.Denver, Colorado, 1223 Slout Street.WESTERN MACHINERY COMPANYDenver, Colorado, 1655 Blake StreetWILFLEY 4 SONS, A. R _ 368Denver, Colo., Denham Bldg.New York City, 1775 Broadway.WORTHINGTON PUMP 5 MACHINERYCORPHarrison, N. J.Denver, Colo., 1725 California St.YARNALL-WARIWG COMPANYPhiladelphia, Penna.Denver, Colo., 1501 Wynkoop St.YUBA MANUFACTURING COMPANY .. 375San Francisco, Calif., 351 California St.Jmpi-oveJB r u n t o n Patent>^ Pocket TransitThis instrument is the most convenient, compact and accuratepocket instrument made for preliminary surveying on thesurface or underground, nearly 30,000 of which are used bycivil and mining engineers, mine managers and geologistseverywhere.Instrument is hereshown with universalsoclcet head adaptedfor use on a light tubularcamera tripod.Improved type instrumentonly. Universalsocket head. Tubularmetal tripod. Plainleather case for instrument.Leather casewith belt loop. Leathercase with sling strap.Leather case for instrument,tripod head andtripod.Send for copy of special booklet giving completedescription of tfie instrument and its uses.Complete stock ofEngineering and DraughtsmanEquipment and SuppliesKISTLER BUILDINGDENVER, COLO.friend indeed. . .W H E N Y O U ' R E"ON THE ROCKS"CRUSHERAre you spending too much timeon the rocks..»working ore down to size forpulverizing? A host of Assayers have foundthis was the case ... until they installed aDFC LABORATORY CRUSHER.INVESTIGATE THE TIME, LABOR,AND REPAIR SAVING FEATURESOF THIS MACHINE1. Rugged one piece frame... no bolts to workloose,2. Motor pivoted lo frame... for correct belttension and minimum bench space.3. Easy to clean...no chance for salting.4. Reversible jaw plates...double service.5. Easy, positive adjustment for fineness.6. Shielded, dust-proof working parts.In Hand or Powera .Driven Typos , rl ^"'J^^^and for Flator V-BeltDrives378THE MINES MAGAZINE ^ JULY 1940THE MINES MAGAZINE > JULY 1940 379