THE AMERICAN BOTANIST 95 



specimen weighs in comparison with an equal bulk of water. 



Anything with a specific gravity less than 1.00 will of course, 



float on water. None of our woods are heavy enough to sink 



in water, but several tropical species are said to do so. 



Weight Specific 



cu. ft. Gravity. 



Arbor Vitae ( Thuja occidcntalis) 22.28 .324 



Catalpa (Catalpa speciosa) 21.72 .347 



Balsam Poplar (Populus balsamifera) 21.99 .352 



Black Willow (Salix nigra) 22.86 .366 



Ohio Buckeye (Aesculus glabra) 23.43 .375 



Hemlock ( Tsuga Canadensis) 23.77 .380 



Basswood (Tilia Americana) 24.00 .384 



White Pine ( Pinus strobus) 24.02 .385 



Box Elder (Acer ncgundo) 25.15 .402 



Cucumber tree (Magnolia acuminata) 26.63 .416 



Red Mulberry (Moms rubra) 26.57 .425 



Butternut (Juglans cinerea) 26.57 .425 



Large-toothed Aspen (Populus grandidentata) 26.57 .425 



Cottonwood (Populus deltoides) 27.15 .433 



Chestnut (Castanea den tata) 28.28 .452 



Red Cedar (Junihcrus Virginiana) 28.28 .452 



Red Elm ( Ulmus fulva) 30.86 .494 



Sassafras (Sassafras variifolium) 31.13 .498 



Buttonwood (Platanus occidcntalis) 31.13 .498 



Black Ash (Fraxinus nigra) 32.27 .516 



Black Walnut (Juglans nigra) 32.92 .527 



Tulip Tree (Liriodcndron tulipifera) 32.96 .528 



Sweet Gum (Liquidambar styraciflua) 33.76 .540 



Blue Ash (Fraxinus quadr an gulata) 34.00 .544 



Jersey Pine (Pinus Virginiana) 34.29 .549 



Red Maple (Acer rubrum) 35.36 .566 



Black Cherry (Prunus Virginiana) 35.82 .573 



Pitch Pine (Pinus rigida) 35.82 .573 



Tamarack (Larix laricina) 35.82 .573 



Red Oak (Quercus rubra) 35.93 .575 



Yellow Birch (Bctula lutea) . . .. . .: 37.72 .608 



Shingle Oak (Quercus imbricaria) 38.00 .609 



White Elm (Ulmus Americana) 38.65 .619 



Hackberry (Celtis occidcntalis) 38.65 .619 



Blue Beech (Carpinus Caroliniana) ...38.65 .619 



Silver Maple (Acer saccharinum) 38.86 .622 



Yellow Locust (Robinia pseudoacacia) 40.00 .640 



Scarlet Oak (Quercus coccinea) 40.00 .640 



Sugar' Maple (Acer saccharum) ,.. .41.14 .658 



Black Oak (Quercus nigra) 42.06 .673 



Honey Locust (Gleditsch ia triacanthus) 42.69 .683 



Coffee Tree (Gymnocladus dioica) 42.91 .687 



Swamp White Oak (Quercus bicolor) ..43.43 .695 



Bitternut (Hicoria cordiformis) 44.39 .710 



Beech (Fagus grandifolia) 44.39 .710 



Pepperidge (Nyssa sylvatica) 44.50 712 



