KEPORT ON THE STRENGTH OF MATERIALS. 



103 



Table of the Mean Strength and Elasticity of various Materials, as 

 deduced from the most accurate Experiments. 



Names of Materials. 



Woods. 



Acacia 



Ash 



Beech 



Birch, Common 



, American Black 



Box 



Bullet Tree 



Cabacully 



Deal, Christiana , 

 , Memel .... 



Elm 



Fir, New England 



— .Riga 



— , Mar Forest ..., 



Green heart , 



Larch, Scotch 



Locust Tree 



Mahogany 



Norway Spars 



Oak, English | j^°'" 



, African 



, Adriatic 



, Canadian ... 



, Dantzic 



Pear Tree 



Poon 



Pine, Pitch 

 , Red 



Teak , 



Tonquin Bean . 



Iron. 

 from. 



Iron, Cast < , 



, Malleable 



, Wire 



Speci. 



fie 

 Gra- 

 vity. 



710 



760 

 700 



700 

 750 



1000 



1030 

 900 

 680 

 590 

 540 

 550 

 750 

 700 



1000 

 540 

 950 

 637 

 580 

 700 

 900 

 980 

 990 

 872 

 760 

 646 

 600 

 660 

 660 

 750 



1050 



7200 



c. 



Mean 

 strength of 

 cohesion on 

 an inch sec- 

 tion. 



lbs. 



17000 

 11500 



20000 



11000 

 11000 

 5780 

 12000 

 12600 

 12000 



7000 

 20580 



8000 

 12000 



9000 

 15000 

 14400 

 14000 

 12000 

 14500 



9800 

 14000 

 10500 

 10000 

 15000 



7760 



16300\ 

 36000 ] 

 60000 

 80000 



Constants 

 for trans- 

 verse 

 strains. 



1800 

 2026 

 1560 

 1900 

 1500 



2650 

 2500 

 1550 

 1730 

 1030 

 1100 

 1130 

 1140 

 2700 

 1120 

 3400 



1470 

 1200 

 2260 

 2000 

 1380 

 1760 

 1450 



2200 

 1630 

 1340 

 2460 

 2700 



8100 

 9000 



Constants 

 for deflec- 

 tions. 



4609000 

 6580000 

 5417000 

 6570000 

 5700000 



10512000 

 7437000 

 6350000 

 6420000 

 2803000 

 5967000 

 5314000 

 3400000 



10620000 



4200000 



767000 



5830000 

 3490000 



Modulus of 

 Elasticity. 



3739000 

 4988000 

 4457000 

 5406000 

 3388000 



5878000 

 4759000 

 5378000 

 6268000 

 3007000 

 6249000 

 4080000 

 2797000 

 6118000 

 4480000 

 4649000 



5789000 

 2872000 



700000047020000 



9500000 

 3880000 

 8590000 

 4760000 



6760000 

 5000000 

 7360000 

 9660000 

 10620000 



55830000 

 2257000 

 5674000 

 3607000 



6488000 

 4364000 

 6423000 

 7417000 

 5826000 



69120000 5530000 

 91440000 6770000 



Ilemarks, 



of English growth. 



ditto. 



ditto. 



ditto. 

 American. 



Berhice. 

 ditto. 



English. 



Scotland. 

 Berbice. 



America, South. 



Results very va- 

 riable. 



East Indies. 



East Indies. 

 Berbice. 



[Mean of English 

 f and Foreign. 



