TABLE OF CONTENTS. 



Introductory. By B. E. Fern-ow 1 



Mechanical tests jiade at W'AsmNGTON University Testing Laboratory', St. Louis, Mo. By Prof. 



J. B. Johnson 3 



Sawiug, storing, and seasoning 3 



The testing laboratory 4 



Description of tests 4 



The cross-breaking tests • 4 



The moisture test 6 



The specific gravity test ■ 6 



The tension test 7 



The endwise compression test 7 



Compression across the grain - 7 



Tlie shearing test 7 



Test of full-sized columns 7 



Signiflcauce of results -- - 8 



Bauschinger's relations - 10 



Relation between strength and stiffness 10 



Relation between strength and weight 11 



Relation between the compressive strength and the percentage of moisture 11 



Relation l>etween specific gravity and moisture 11 



The long-leaf tine. By B. E. Feknow 14 



Market names 14 



Field names 16 



Distribution and habitat ' 17 



Characteristics of the wood 20 



Special adaptations of long-leaf yellow pine -'1 



Results of mechanical tests. By .J. B. .Tohnson 22 



Variation of strength with lupisture 22 



Eft'ect of moisture 24 



Relation between strength and stiffness - - - 24 



Relation between strength and spcci fie gravity 24 



Range of individual results as compared with the average of all 24 



Variation in strength of different trees 25 



Comparison of single qualities with the average <]uality 27 



Relative strength of large and.small beams - 27 



Variation in strength across the section of a log 29 



Variation of strength at difi'ereut heights from the ground 30 



Shearing and crushing strength parallel and transverse to the annual rings 30 



Shrinking in seasoning - 30 



Etfect of boring or bleeding for turpentine on strength of timber 30 



Field report regarding ti;rpentine timber. By Filbert Roth 32 



A chemical study of the resinous contents and their DISTRIBtTTION IN TRE^S OF THE LONG-LEAF 



PiS'E before and AFTER TAPPING FOR TURPENTINIi. By M. GOMBERG 3i 



Chemical composition of turpentine 34 



Analytical work 37 



Description of the method employed 38 



Discussion of results obtained ■'1 



FlKLD REt'ORDS OF TEST MATERIALS. By CHARLES MOHR iJO 



V 



