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Address Advertising Manager 



NATIONAL GEOGRAPHIC MAGAZINE 



Washington, D. C. 



ENGINEERING EXPERTS-MINING, MECHANICAL, 

 ELECTRICAL, CIVIL 



Coal Mines and Coal Properties Examined; will also 

 take charge of the development and working of mines 

 in Washington; 19 years' practical experience in Wash- 

 ington and Canadian coal fields. 



F. A. HILL, Consulting Engineer, 



609 Mutual Life Building . . Seattle, Washington 



Phone, Main 432; Residence, East 741. 



H. E. SMITH, Mining Engineer, Box 335, Ft. Smith, Ark. 



General and Secret Investigations made in the Lead 

 and Zinc Fields of Missouri, Oklahoma, and Arkansas 

 for non-residents. 



E. M. JONES, 1125 James Bldg., Chattanooga, Tenn., 



Mining Engineer — reports, plans for development, and 

 supervision of operations of coal properties. No surveys 

 made. Experience: Penna. Anthracite Field, Penna., 

 Maryland, W. Va., and Tenn. Soft Coal Fields. 



STEPHEN E. KIEFFER, M. Am. Soc. C. E. Civil and 

 Hydraulic Engineer. Expert solution of Water Supply 

 and Irrigation Problems in the Arid West and Mexico. 

 First National Bank Building, Berkeley, California. 



PATENT ATTORNEYS 



ALEXANDER & DOWELL, Attorneys at Law. Regis- 

 tered Solicitors of United States and Foreign Patents. 

 Practice in all United States Courts. 

 607 Seventh Street . . Washington, D. C. 



TUTOR 



HOWARD C. JENNESS, A. B. (Harvard), Tutor, will pre- 

 pare boys for the leading colleges, the Naval Academy, 

 and West Point. Successful experience at Harvard. 

 Special classes for men wishing to enter The George 

 Washington University on certificate. 

 Telephone. Apt. 41, 1723 G St., Washington, D. C. 



♦fFT is the remarkable scope of the New 

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 that makes it the ideal lens for every class 

 of photography. 



You can get artistic results 

 with the 



Bausch & Lomb- Zeiss 



New Tessar 



when a lens of less remarkable parts 

 would produce failures. 



We should be pleased to send you our 

 descriptive circular, which explains fully 

 the New Tessar 1 C, for ultra rapid 

 work, as well as the Complete Tessar 

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DDTQA/I ls A LITTLE MAGAZINE OF LENS 

 ■T IVlOlVl INFORMATION. SEND FOR COPY. 



f Our name on a photographic lens, field glass, 



MICROSCOPE, LABORATORY APPARATUS, SCIENTIFIC OR 

 ENGINEERING INSTRUMENT IS A MARK OF QUALITY. 



Bausch & Lomb Optical Co. 



Carl Zeiss, Jena 

 Offices: 



George N. SaegmuIIer 

 San Francisco 



B-L 



S / Washington 

 London 

 Frankfort 



ROCHESTER, NEW YORK 



Your courtesy in mentioning the Magazine when writing will be appreciated 



