CLASSIFIHI) INDEX. 



Arguments for PKOPOf.KD Timber Examinations: 

 Difficulties of the work, 2, 3, 11, ir>. 

 Deliiieneies in existing exaiiiinations, 3, 0. 7. 111. 

 Economy of material resulting, 1,7,8,9. 

 European investigation.s not sufficient, 2, 3, (i. 

 Forest waste reduced, 1, 2, 8, 13. 

 Gov(^rnment work uecessary, 'J. 10, 12. 14. 1."), 16, 28. 

 Iguorauoe of proiiertii's of timber prevailing, 1, 2, 4, .">. 

 lulbrmatiiin scanty and unreliable, 1.4.7. 

 Eoss and waste due to ignorance, cxamiiles !,,"),(). 

 Saving liuancially, 1, 7, 13. 

 (Small teat speciuii'us give unsatisfactory results, 2, 



6,7,11. 



Uncertainty in s]iecitications, 2, 13, 1,5. 



Definition.s : 



Chemical properties, 18, 1!>. 



Elastii'ity modulus, 38. 



Mechanical properties, 18, lit, 20. 



Physical properties, 18, 19. 



Physico-technical properties, 19. 



Resilience, 37. 



Site, 51. 



Station, 51. 



Technical properties, 20. 



Technological jiroperties, 25. 



Timber physics, 17, 19. 



Working properties, 25. 

 FORMl'LAS: 



Coefficient of elasticity, 21 (Pai^ciuotti). 

 Cross-breaking st/ength related to modulus of elasti- 

 city, 38. 

 Crushing strengfli relatcil to specific gravity, 24,38. 

 Density, 48. 



Modulus of elas(wity (Young's), 38. 

 Moisture, 48. 

 Shrinkage, 48. 



Strength oi extreme fiber, 37. 

 Influences on Properties. (See Properties.) 



INSTRU.MENTS. (SEE MACHINES De.SCKIBKD.) 



Machines ano Instruments Mentioned and De- 



sCRlliEl) (d): 

 Heam-ti^sting maebine. small, 32, 33, (d) jdali- ill; 



large, 32 (d) )date 11. 

 Calibrating springs 32, (d) plate ii. 

 Ctdiimu-testing machine, 32,35 (d) plate VI. 

 Dry kiln, 31, 32 (d). .34, 47, l>late li. 

 Laboratory, 32, plate I. 



Micrometer caliper (Darling, Urowii .V .■^biiipe), 45. 

 Slide rule (Thatcher's), 32. 

 Specilic gravity apparatus 43 HI), 44. 



Machines and Instruments — Continued. 



■ ITniversal Testing Mailiine (Kiehle's "Harvard"), 

 32, 34. 35, idates IV, V. 

 Methods: 

 Tisliny — 



Be:inis of large size, 22, 25, 32. 



Calibrating, 32. 



Columns of large size, 27, 28 (Lanza), 27 (T. H. 



Johnson). 

 Compression, 28. 34. 35 (Smith), 35. 

 Cross breaking, 32, 33. 

 Cubic blocks (P;icciuotti A Peri), 21. 

 Fuel value, 26 (Bull), 26 (Sharpies). 

 Moisture, 34, 47. 

 Prolonged stress, 27, 28. 

 Shearing, 35. 



Shrinkage, 48. ' 



S})ecitic gravity, 34, 43. 

 Tanning values, 26, 30. 

 Tension, 34. 

 Time inflm'nce, 27, 28. 

 Tone vibration.s, 20, 21 (Savart), 22 (Chevandier), 



27 (Ihlseng). 

 Torsion, 21, 27, 28 (Thurston). 

 Velocity of sound. 27 (Ihl.seug). 

 Wood-working machines, 24. 

 Working capacity (Tetmajer), 23. 

 Test malcrUil — 



Collecting, 22, 23, 51, 62, 53. 

 Condition, 42. 

 Drying, 31, 47. 

 Measurement, 43, 44, 50. 

 Moisture dctermiiiatious, 34, 47. 

 Prejiariug and marking, 31, 34, 35, 42, 53. 

 Struitur:il examinalion, 49, .50. 

 Weighing, 43-46. 

 Names mentioned: 



Abbott, A. V. (testing machines), 27. 



Allen, W. F. (lettc^r), 16. 



Antlrews, Horace (letter), 15. 



Andrews, .1. W. (hitter), 13. 



Harlow (strength of timber), 20, 23. 



Bates, Edward (letter), 8. 



Bauschinger (strength of pine timb.T), 4, 23, 24, 38, 



40, 47. 

 Bcardsley, Arthur (letter), 10. 

 Uelidor (mechanical properties of wood), 20. 

 Benzenberg, C. 11. (h-ttcr), 11. 

 Berg, L. D. (letter), 17. 

 Bevau (experiments in torsion), 20. 



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