286 
has been fitted up at the gardens since 1913 for the purpose of 
experiment, special mention being made of experiments with 
the variety ‘‘ Alphonse,” also included with other varieties as 
having been found to keep well as a fresh fruit. 
Woodrow, in his book on the Mango (1904), describes 80 
famous mangoes; the present work gives outline figures and 
descriptions of 89 varieties. ° 
The Silviculture of Indian Trees.*—This comprehensive work 
comes at a very appropriate moment, for a special effort is being 
made to interest importers and manufacturers in Indian woods, 
and such a book cannot fail to impress people with the wealth 
of trees growing in the forests of India. Professor Troup’s long 
connection with the Indian Forest Service at the Forest Research 
Institute at Dehra Dun and elsewhere, placed him in a peculiarly 
advantageous position for studying the subject, whilst his 
undoubted ability for critical observation and description enabled 
him to make the most of his opportunities, and he has produced 
a book which will, without doubt, become classical in its applica- 
tion, although the author regards it simply as a foundation for 
further effort in the creation of a greater work on Forest 
Research by future workers. There are three volumes con- 
sisting of 1195 pages of descriptive letterpress, in addition to 
58 introductory pages and 490 pages of black and white and 
coloured illustrations. The book is arranged botanically, the 
first volume carrying the student from Dilleniaceae to Legumin- 
osae (Papilionaceae). Volume II advances the work to Verben- 
aceae, whilst the third volume commences with Lauraceae and 
concludes with Coniferae and a good index. In the introduction 
the author directs attention to the very complex nature o 
Indian silviculture, its limitations and possibilities. The immense 
area of country under the direction of the Indian Forest Service 
embraces all kinds of climatic conditions, from hot arid plains 
with a negligible rainfall to regions with a precipitation of 
460 inches per annum; and from land sweltering under tropical 
heat and cloudless skies to alpine valleys shrouded in almost 
etual mist, and altitudes where the temperature is too low 
for the proper development of cold temperate trees. As the 
soil conditions are quite as variable, it might naturally be 
expected that the silva of the country would be rich in species, 
and such is the case. The timber of some of these species, 
though of local use, has little or no general application; and the 
author appears, in the first place, to have been undecided as to 
the advisability of including them amongst more important 
trees. Fortunately, he decided in favour of the wider view, 
and the result is a complete work on the forest trees of India, 
including a few important exotics, notably species of Eucalyptus. 
In dealing with the less important trees, Prof. Troup gives a 
* The Silviculture of Indian Trees, by R. 8S. Troup, M.A., C.LE. 
vols. Published under the authority of His Majesty’s Secretary of 
State for India in Council. Oxford, at the Clarendon Press. 
