INDEX. 279 



Trade winds, -. . . ... . 144 



Trachyte, ..... 83 



Tap root, . . . . . .103 



Tuberous roots, . . . . * 104 



Trees, 107 



Temperature, table of . . . . 130 



Thunder, ...... 141 



Thunder, cause of . . . . 141 



Tornado, . . . . . .145 



Tillage, varieties of . . . . 177 



Tillage, objects of . . . .177 



Trench ploughing, . . . . 178 



Tanner's bark as manure, . . . .198 



Top dressing for crops, . . . . 199 



u 



Urine as manure, . . . . .196 



Urine, waste and value of . . . . 197 



V 



Vein, 76 



Variety defined, ..... 94 



Veins, ...... 112 



Venation, . . . . . . 112 



w 



Water, . . . . . .46 



Wax, ...... 61 



Wood, 107 



Weather, ...... 125 



Whirlwind, . . . . . .145 



Warping, . . . . . 179 



Wood ashes as manure, .... 206 



Wheel and axle, . . . . , 234 



Wedge, ...... 234 



Winds, .... . . 142 



Wool as manure, . . . , .192 



x 



Xanthine, ..... 64 





 Yeast, .... 







