We carry a large assortment of 

 seeds of EVERGREEN and 

 DECIDUOUS TREES and 

 SHRUBS, both native and im- 

 ported, and shall be glad to quote 

 on any that are still unsold. 



J. M. THORBURN 6 CO. 



33 BARCLAY STREET 



ThrougK to 38 Park Place 



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PENNSYLVANIA 

 STATE COllEGE 



Ksta^blished 1802 



NEW YOKK 



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 ■¥ 



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A thorough and practical undergraduate 

 course in technical forestry, preparing men 

 for all lines of professional and applied 

 forestry. 



Special attention is paid to practical field 

 work in surveying, mapping, and forest 

 measurements. One of the largest of the 

 State Forest Reserves is within a short 

 walk of the college. 



Department o/ Forestry 



State College. Pei\na. 



This Solar can be used in hazy weather, 

 when other Solars are useless. Used by 

 the U. S. General Land Office. 



Specifications 



Needle ZV« inches 

 Ion". Oradnations 4% 

 iiiflies loner. reading 

 niinutrs. Power of 

 telesfope 20 (with 

 .'splenrtiil definition, jrood 

 li.alit. and Inrce field). 

 Variation plate. Level 

 to telescope. clamp 

 and opposln,? screws. 

 Vertical arc. Fixed 

 Stadiahairs. Extension 

 Tripod. Solar At- 

 tacliinont on side of 

 standards. 



Price Complete, $30 J 



Telegraph and Code Word, Mountsolar 



Illustrated Catalogue Upon Application 



YOUNG 6 SONS Philadelphia 



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For information regarding entrance re- ♦ 

 quirements, expenses, etc., address J 



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PLANE SURVEYING 



A Text-book and 

 Pocket Manual 



By John Clayton Tr.\cv. C. E. 



Ass't Professor of Structural Engineering 

 Sheffield Scientific School of Yale University 



i6 mo, xxvii -|- 792 pages, illustrated with 

 line cuts. Morocco, $3.00 



Used in the Yale Forestry School and just 

 adopted in Pennsylvania Department of 

 Forestry 



Descriptive Circular on Application 



JOHN WILEY 6 SONS 



43 and 45 E. 19th Street 

 New York City 



In writing to advertisers kindly mention Forestry and Irrig.\tion 



