232 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 
commendation (for example, at pp. 41 and 164) from their 
Transactions and records of their proceedings. 
When so much has been said, however, it is freely acknow- 
ledged that Mr Simpson’s book contains much that is readable 
and of great practical utility. He gives useful details on such 
important practical matters as fencing, road-making, nursery- 
work, and planting. A description is given of the methods of 
planting he has found most suitable in his practice, and no fault 
can be found with them, though it may be pointed out that what 
is suitable in one set of circumstances may not always be of 
equal advantage in another. But it is not too much to say that 
a careful perusal of Mr Simpson’s book will be of very consider- 
able use to a young practical man in want of authoritative 
guidance in many such matters of detail. 
Mr Simpson’s “ Sylva” is perhaps a little confusing. In his 
“List of Species described,” for example, at page 98, the true 
pines (Pinus), as well as the spruce and silver firs, are all 
given the common name of “fir,” and the spruce and the 
Douglas and silver firs are given the generic name of “ Adzes,” 
while, on the other hand (pp. 105, 107), all the true pines 
described are “firs,” except the Weymouth pine. 
The author’s remarks on thinning and pruning are sensible 
and to the point, and he gives useful details of work in the 
cultivation of coppice and osiers. He has also a good chapter 
on “ Valuing and Selling of Timber.” 
Altogether, we are sure this second editon of Mr Simpson’s book 
will be welcomed by many interested in forestry, and no forester’s 
library will be complete without a copy. J. saa 
future Forest Trees. The Importance of the German Experiments 
in the Introduction of North-American Trees. By A. HAROLD 
Unwin, D.dEc. London: T. Fisher Unwin, 1905. Price 
7s. 6d. net. 
In the Preface to this work the author, who is Assistant 
Conservator of Forests in Southern Nigeria, and was formerly 
in the Forestry Branch of the Department of the Interior of 
Canada, states that the subject-matter appeared originally in 
German in the Austrian Forestry Magazine, and that his object 
in this translation is to present in the most concise manner the 
results of numerous experiments, chiefly made in Germany, with 
