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. 





22.28 



.324 





21.72 



.347 



Balsam Poplar (Populus balsamifera) . . 



21.99 



.352 





22.86 



.366 



Ohio Buckeye {Aes cuius glabra) ....... 



23.43 



.375 





23.77 



.380 





,24.00 



.384 





24.02 



.385 





. . ,25.15 



.402 



Cucumber tree {Magnolia acuminata) , , 



26.63 



.416 





26.57 



.425 





26.57 



.425 



Large-toothed Aspen (Populus grandidentata) 26.57 



.425 





27.15 



.433 





28.28 



.452 





28.28 



.452 





30.86 



.494 





, . , 31.13 



.498 



Buttonwood (Platanus occidentalis) .... 



, .31.13 



.498 





32.27 



.516 





32.92 



.527 



Tulip Tree (Liriodendron tulipifera) . „ . . 



32.96 



.528 



Sweet Gum (Liquidambar stvraciUua) . . 



33.76 



.540 



Blue Ash {Fraxinus quadrangulata) . . . . 



, . ,34.00 



.544 





34.29 



.549 





35.36 



.566 





, ,35.82 



.573 





, . . .35.82 



.573 





35.82 ■ 



.573 





35.93 



.575 





37.72 



.608 





38.00 



.609 





38.65 



.619 





38.65 



.619 





38.65 



.619 





38.86 



.622 



Yellow Locust (Robinia pseudoacacia) . . 



. , .40.00 



.640 





40.00 



.640 



Sugar Maple {Acer sac charum) 



, . .41.14 



.658 





, , ,42.06 



.673 



Honey Locust {Gleditschia triacanthus) . .. 



. .42.69 



.683 



Coffee Tree (Gymnocladus dioica) 



. .42.91 



.687 



Swamp White Oak {Quercus bicolor) ... 



... .43.43 



.695 





. .44.39 



.710 





44.39 



.710 



. . .44.50 



712 



