APPENDIX. 



\ 



A Tulle rf the Sbecifc Gravity of several sorts of Wood. 



Specific Gravity. Weight of a Cube Foot. 



II. 0z. 



Thorn, 8/ . . , 54 6 



Crab-tree, 85 , . .-* r. ....... 53 2 



Quince-tree, S3 . . . , 51 14 



Mahogany, 82 5 1 4 



Plum- tree, 8O 50 



Holly, SO 5O O 



Ash, 76 47 8 



Barberry, 76 47 8 



Nut-tree, 76 .... 47 8 



English oak, 75 46 14 



Beech, 74 46 4 



Elder, 73 * 45 1O 



Pear-tree, 73 45 1 



Mulberry, 71 44 6 



Walnut, 69 43 2 



Yew, 67 41 14 



Maple, 00' 41 4 



Yellow deal, ,63 39 6 



Cherry, 6l 33 2 



NorwayV>ak, 60 37 8 



Sallow, 59 3(5 14 



Sycamore, 59 36 14 



Elm, 5O 31 4 



N. B, All the woods were very good of the sort, except the 



elm, and all very dry; the measure is English, and the weight 



avoirdupois. 



No. VIII, 



