234 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
German foresters, who mishandle their exotics or leave them to 
the mercy of the animals of the forest.” 
The book consists of three parts. In the first part, the importa- 
tions of American timbers into Germany are given in detail; the 
second part gives the ‘“‘ General Results of the Plantation Experi- 
ments with American Trees in Germany, Austria, Great Britain, 
and Switzerland”; while the third part deals with the “ Sylvi- 
cultural Characteristics and Treatment of the Various American 
Species of Trees.” 
In the experiments 55 species were used, 26 broad-leaved 
trees and g conifers from the eastern parts, and 1 broad-leaved 
tree (Fraxinus oregona) and 19 conifers from the western parts of 
the North American continent. As was to be expected, the 
species from the eastern parts have proved more frost-hardy than 
those from the Pacific coast-region, while those from the latter 
region have, on the average, proved the more rapid in growth. 
Summarising the results, the American species which are likely 
to prove of greatest value sylviculturally in Germany are locust 
(Robinia Pseudacacia), Weymouth pine, the Pacific and Colorado 
Douglas firs, and the Banksian pine; and next to these come the 
shell-bark hickory (Carya alba) and black walnut. Cypresses 
“are hardly likely to become of a greater general value,” and 
such species of fir, pine, ash, oak, etc., as are closely related to 
the European species “may turn out useful for sylvicultural 
reasons in those parts of Europe in which these species of trees 
are not to be found, but in those localities where these kinds of 
timber already exist, the kindred exotics appear to be superfluous.” 
In this category would be included, of course, such species as 
the white oak (Quercus alba), the American ash (fraxinus 
americana), the American elm (Ulmus americana), and the red 
pine (Pinus resinosa). Such species as the Banksian pine and 
Pinus Murrayana seem, owing to their great frost-hardiness and 
to their very modest demands as regards soil-requirements, to be 
specially valuable for the afforestation of poor, waste land in 
exposed situations. As: Dink 
The Estate Nursery. By Joun Simpson. Published by the 
Country Gentlemen’s Association, Ltd., 1905. Price 5s. net. 
In this little book there is not much that is really new, but 
the author, founding on the solid ground of his own experience, 
