CONTENTS. 7 



The Loblolly Pine (Pinm luda Lhiu.)- By CllAHLEs Moiiu, Ph. D.— Coutinued. Page. 



Conditions of developmeut 129 



Soil and climate 129 



Relation to light and associated species 130 



Enemies .' 130 



Natural reproduction 131 



Conclusion 132 



Additional notes on Loblolly Pine. By Filibert Roth 133 



The Spruce Pine (Piiuis glabra Walt.). By Charles Mohr, Ph. D 135 



Introductory 137 



Historical 137 



Distribution 137 



Economic importance 137 



Botanical description 138 



Progress of development 139 



Enemies 140 



Requirements of development 140 



Notes on the structure of the wood of live Southern pines (I'iiiun jxilittris, heta-nphyUa, echinata, iada, and 



glabra). By Filibert Roth 141 



Sap and heartwood 143 



Annual rings , 144 



Spring and summer wood 146 



Grain of the wood .' 148 



Miunte anatomy 148 



Observations on the Marsh or Pond Pine (/'iHws S(TO</na). By Filibert Roth 167 



Distribution 169 



Botanical description 170 



Progress of development 170 



Economic importance 171 



