26 TREES AND. FORESTS. 



acteristics of different trees, 1866.. — Change of the foliage in autumn, 1875. — Forest schools 

 in Europe, 1875. — Characteristics of the foliage of northern compared with that of south- 

 ern trees, 1865. — Action of frost on trees, 1874. — Effect of girdling, 1873, 74. — Value of 

 farms increased by trees, 1875. — Purification of the atmosphere, 1875. — Nearness to dwell- 

 ing-houses, 1875. — Notes on trees and tree-planting, by C. S. Sargent, 1875, 77. — Forest 

 fires, by C. S. Sargent, 1882. — Forest tree planting, by A. P." Slade. — Discussion on 

 forestry. — Report of the committee on forest trees, by John Robinson, 1883. — Forestry 

 and arboriculture in Massachusetts, by John Robinson, 1887. — Report on forestry, i8go. — 

 Act . . . for the preservation and reproduction of forests, 1893. 



See also the Transactions of the Massachusetts horticultural society, and of the 

 » American association for the advancement of science, passim. 



