Specific Gravit)j.~] 



OF THE UNITED STATES. 



157 



405 

 400 

 407 

 408 

 409 

 410 

 411 

 412 

 413 

 414 

 415 

 410 

 417 



Species. 



Populus nngustifolia 

 Fin us monticola . 

 Populus monilifera 

 Pinus Strobus . . 

 Abies balsamea . 

 Populus triclmcarpa 

 Thuya gigantea . 

 Picea pungens . . 

 yucca brevifolia . 

 Pinus Lambertiana 

 Abies concolor . . 

 Populus balsam if era 

 Abies Fiaseri . . 



Species. 



Abies giandis . . 

 Fraxinus platycarpa 

 Pinus tuberuulata 

 Abies subalpina . 

 Picea Engelmanni 

 Chamsecyparis spliEeroidea 

 Cereus giganteus . . 

 Thuya occidentalis 

 Bursera gummifera 

 Sequoia gigantea . , 

 Yucca baccata . . 

 Ficus aurea .... 



0.3545 



0.3541 

 3499 

 0.3476 

 0.3449 

 3322 

 0.3188 

 0.3104 

 0.3003 

 0.2882 

 0.2724 

 0.2616 



03 

 J3. 



