INDEX 



Abies 91 



Acereae, 69 



Air is purified by trees, 24 



Arbor Vitae, 94 



Ash-trees, 68 



Balsam fir, 91 



Basswood 62 



Beech, •. 84 



Belts of Trees, 18, 40, 45, 47 



Beat trees should be planted, 53 



Betulacese, 86 



Birches 86 



Butternut, '73 



Carya, , 76 



Oastanea, 82 



Cedar-white 04 



" red, 95 



Celtis, 72 



Oherry-black 64 



Chestnut, 82 



Climate, aifeoted by trees, 9 



Climate, peculiarities of, 37 



Coifee-tree, ,. 65 



Conclusion, 100 



Coniferse, '. . 87 



<'onsuiiiption of wood generally 24 



Consumption by railroads, .' 25 



Corn cannot be substituted for wood for fuel 34 



Cucumber-tree, 57 



Cultivation, trees recommended for, 57 



Cu^ressineae 94 



Cutting trees, time of, 45 



Cypress, , 96 



Duty of the State, 35 



Effect of clearing land of trees upon the climate, 9 



Effect of trees upon springs, streams, &c. , 9 



Effect of trees upon electric currents, 22 



Electric currents affected by trees, 22 



Elms 70 



Experiments needed, 36 



Pagus, 84 



Freights affected by fuel, 30, 33 



Fuel, trees classed by value for, 55 



Hackberry, 72. 



Hemlock, 91 



Hickory, 76 



History, warnings of, 4= 



Introduction, 3 



Isosthermal lines, 37 



Juglandaceaj, '^^ 



Juniperus, 96 



Land is enriched by tijees, 23 



Iiarch, 92. 



