25G 



FOREST TREES OF NORTH AMERICA. 



The following table gives tlio figures from which the table of relative values was computed, and includes all 

 species upon which complete tests have been made. 



The coefflcieut of elasticity is derived from the second deflection, the measurements being taken in millimeters 

 and the weight in kilograms. 



The ultimate transverse strength is the force, applied at the middle of the stick, required to break a stick 4 

 centimeters square and 1 meter between the supports. 



In the compression tests the surface exposed to pressure was 4 centimeters square. To give the pressure 

 on a square centimeter these results must be divided by 16. 



The indentation to 1.27 millimeters, or the fifth in the series, is the one selected for comparisoii. 



TABLE OF AVERAGES. 



12 



U 



19 



20 



28 



29 



Species. 



MAGN0L1ACK.. 



Magnolia gi-andiOora 



Magnolia gluuca 



Magnolia acuminata 



Magnolia cordata 



Magnolia niacrophylla 



Magnolia Umbrella 



Magnolia Fi-aseri 



Iiiriodeudrou Tnlipifera 



ANONACEJE. 



Asimina triloba 



Anona lani-ifolia 



CANELLACE.a:. 



Canellaalba 



TERNSTR(EM lACE.^;. 



Gordonia Lasianthus 



TILIACE.*;. 



Tilia Americana 



Tilia Americana, var. pnbesceua 

 Tilia heterophylla 



MALPIGHIACE.a!. 



Byrsonima Incida 



ZYGOPHTLLACEJE. 



Gaaiacnm Banctnm 



RUTACE.aE. 



Xanthoxylam Clava-Herculia... 

 Xantboxylnm Caribffium 



SIMAEtIBE.a!. 



Simamba glanca 



BURSEKACE.ffi. 



Burflera gnmmifera 



Amyris fiylvatlca 



MELIACE.. 



Svictenia Mabogoni 



ILICINEa;. 



Uox opaca 



Ilex Daboon 



CYUILLACEiE. 



Cliftonia lignstrina 



KHAMNACEa;. 



Beynosta latifolia 



Condalia ferrea 



Kbamnoji Caroliniana 



Bhamniu Panbiana 



K a 



- 



p. 



a. 



63.26 

 50.11 

 4C.76 

 41.20 

 52.90 

 44.78 

 49.89 

 42.20 



39.61 

 4a 11 



97.20 



46.92 



45.00 

 40.47 

 42.27 



57.43 



113.38 



50.15 

 88.20 



40.98 



29.41 

 103.97 



72.03 



67.74 

 47.62 



62.23 



108.72 

 119.38 

 64.27 

 S6.34 



.^g 



^ c * 



014 

 929 

 941 

 1,109 

 744 

 944 

 926 



482 

 501 



1,117 



794 



840 

 811 

 846 



S25 



726 

 868 



932 



417 

 1,085 



1062 



643 

 642 



783 



1,050 



1,143 



741 



913 



1 = 



U' H OD 



2^ 



a a 



313 

 280 

 256 

 297 

 249 

 302 

 280 



252 

 239 

 246 



181 



336 



273 

 822 



241 



63 



557 



428 



293 

 244 



225 



350 

 380 

 242 

 320 



C5 B q 



Hi 



7,705 

 6,790 

 6,633 

 6,552 

 7,829 

 6,861 

 6,691 

 5,955 



167 3,395 

 259 4,829 



438 12, 519 



6,195 



5,768 

 6,487 

 6,307 



6,260 



11,789 



7,189 

 10,955 



6,816 



2,473 

 11,975 



10,660 



6,709 

 5,582 



5,938 



13, 426 

 12,848 

 7,112 

 9,984 



\H 



e c ca 



3,156 

 1,027 

 1,709 

 1,427 

 1,427 

 1,343 

 1,966 

 1,296 



1,098 

 2,037 



9,163 



1,591 



1,044 



950 



1,296 



3,475 



12,689 



2,548 

 5,904 



1,383 



749 

 8,795 



4,951 



2,826 

 1,808 



2,356 



9,763 

 10.388 

 2,195 

 3,076 



Species. 



SAPIKDACE.aE. 



50 , .8culaa glabra 



52 ^uculna Califomica 



54 ' Sapindns marginatas 



60 j Acer macrophyllum. 



01 I Acer circinatnin 



64 Acer saceharinum 



64 Acer saccbarinnm, t?ar. nigrnm . . 



65 Acer dasycarpum 



Acermbrum 



67 Xegundo aceroides 



Negundo Califomictim 



ANACARDIACE.a!. 



Bbns copallina. 



KbusMetopima 



LEGUMIirOS.a!. 



Eobinia Psendacacia 



Kobinia Neo-Mexicana 



Olnoya Tesota 



Piscidia Erythrina 



Cladrastis tinctoria 



Sopbora affinis 



Gymnoclados Canadensis . 

 Gleditschia triacantbos- . . 

 Gleditschia monosperma. . 

 Farkinsonia Torreyana . . . 



Cercis Canadensis 



Prosopia juliflora 



94 ; Prosopis pubesceos. 



! E0SACE.S:. 



103 I Pninua Americana 



104 ' Pi-uuus anguatifolia 



107 Prunus emarginata, var. mollis. . . 



108 j Pronus serotina 



110 ' Pruuus demiHsa 



111 ' Prunua Caroliniana 



113 ! Prunua ilicifolia 



117 j Pyms coronaria 



121 Pyi'us sanibucifolia 



125 Crataegus arboresceas 



126 I Cratajgua Cnia-galU 



128 I CratsDgus aubvillosa 



120 Crataegus tonit-ntoaa 



132 Cratiegna spatbidata 



134 ! Cratgiia icativalis 



135 I Cratcegna fiava, rar. pabescens... 

 137 I Anielancbier Canadensis 



j HAMAMELACEA 

 189 I Uqnldambar Styraoiflaa 



B h S 

 5 S 

 .2" " 

 i-Ea 



2 64 " 



fr o a 



net 



5,017 

 5,686 

 7,523 

 6,100 

 7,349 

 9,907 

 a 803 

 7,711 

 7,402 

 5,151 

 7,072 



6,033 

 8,623 



11,272 

 10,931 

 5,851 

 9,548 

 8,550 

 0,129 

 C,406 

 8,001 

 0,344 

 6,679 

 7,510 

 9,412 

 10,732 



419 



441 



507 



746 



165 



089 



709 



706 ! 



123 



909 



884 



612 



117 



280 



122 



437 



712 



1,132 

 1,722 

 4,350 

 2,597 

 3,205 

 4,019 

 4,149 

 2,899 

 2,795 

 1,781 

 1,719 



1,744 

 3,348 



4,038 

 4,427 

 10, 478 

 5,698 

 2,937 

 5,348 

 2,660 

 2,697 

 4,420 

 3,620 

 2,917 

 5,484 

 5,267 



3, 405 

 2,132 

 1,280 

 3,269 

 .%937 

 5,090 

 4,888 

 3,999 

 1,715 

 2,9.>1 

 3,368 

 4,207 

 3,844 

 3.484 

 3,68.T 

 5,103 

 4,483 



278 7, 462 I 2. 122 



