March 1, 1864] THE TECHNOLOGIST. 



THE SPECIFIC WEIGHT OF WOODS, ETC. 3< 



Length in 

 Centimetres. 



Evergreen oak (Quercus ilex) 200 



Lima or Peach wood (Cozsalpinia echinata) . . . 203 



Jujube of Sardinia (Zizyphus vulgaris) .... 207 



Green Ebony (soufre), Taigu of Paraguay, Ipe of Brazil . 208 



Jacaranda or rosewood 209 



Rosewood of Brazil (Tacaranda sp.) .... 213 



Boxwood of Piedmont (Buxus sempervirens) 214 



Service tree (Pyrus domesticus) 215 



Filaria (Phillirea) 217 



American box (Buxus sempervirens) . . . .218 



Apple (Pyrus malus) 218 



Service tree of Piedmont {Pyrus domesticus) . . .221 

 Olive of Genes river (Olea Europea) . . . .221 



Arbutus (Arbutus unedo) . . . . • . . 224 



Oak of Piedmont (Quercus robur) . . . . 225 



Laburnum or false ebony (Cytisus Laburnum) . . 228 



Bitter orange, Sardinia (Citrus vulgaris) . . . 232 



Jujube of Tuscany (Zizyphus vulgaris) . . . 236 



Alaterne of Tuscany (Rhamnus alaterue) . . . 237 



Oak of Italy {Quercus robur) . . . . 245 



Wild orange (Citrus aurantium) 250 



Fustic of Cuba (Madura tinctoria) .... 250 



Oak (Quercus rohur) 250 



Cypress of Tuscany (Cupressus sempervirens) . . . 252 



Sorbier des oiseleurs (Pyrus Aucuparia) . . . 252 



Yellow wood or morab of Paraguay — Natare . . . 255 



Sparto of Sardinia . 256 



Apple of Piedmont (Pyrus mains) 257 



Larch. (Pinus larix) . . . . .- . . 260 



Beech (Fagus sylvatica) 262 



Maple of Genes (Acer campestre~) 262 



Ash (Fraxinus excelsior) 264 



Ash of Tuscany 264 



Ash of Piedmont . . 265 



Elm (Ulnus campestre) 266 



Peach (Amygdalus persica) 266 



Larch or Nileze of Piedmont (Pinus larix) . . . 270 



Laburnum of Piedmont (Cytisus laburnum) . . . 271 



Pear (Pyrus communis) . 271 



Beech of Piedmont (Fagus) 275 



Maple of Tuscany (Acer loppo) 283 



Lot tree of Sardinia (Crataegus Aria) . . . 285 



Birch of Piedmont (Betula alba) 291 



