130 
Reviews and Book Notices. 
between flowering and cambial activity in Populus and Salix spp., 
cambial activity is found below the developing catkins, and dry weight 
increase of the catkins is observed in Hazel and Alder. There is no 
increase in dry weight in the developing catkin, and no cambial activity 
is found below them. 
Northward Ho! for Birds, by Ralph Chislett, 
F.R.P.S. Country Life, Ltd., pp. xvi+188, 15/- net. North Country 
naturalists should be very proud of Mr. Chislett for the making of this 
wonderful book. Nowadays there are many good nature photographers, 
many first-rate naturalists, and not a few people can write pleasing 
and accurate English, but it is very rare to find marked ability in all 
three spheres combined in one man. No one will read Mr. Chislett’s 
book without feeling that they are observing in the company of a skilled 
specialist whose powers of observation are appropriately matched by his 
lucid descriptions of the subjects of his prolonged study. Verbal pictures 
of actual sections of the countrysides visited, and of the bird life in general 
which inhabits them, are accompanied by intimate details of the home 
life of many rarities ; and the surrounding plant life is not forgotten. 
The book can be considered as a record of the bird life of northern moor- 
land, from northern England, Scotland and Shetland to far Lapland, 
with three chapters on the birds of a Baltic island, and a final one on 
methods in the field and after as make -weights. Mr. Chislett’s photo- 
graphs are well known to Yorkshire naturalists. His real love of birds, 
happily combined with rare patience and skill, have enabled him to 
make perfectly natural pictures. In this book there are reproduced no 
less than 87 fine photographs of 51 species, among those dealt with 
being the Whimbrel, Greenshank, Crested Tit, White Wagtail, Red- 
spotted Bluethroat, Wood Sandpiper and Dotterel. The reproduction 
of the photographs are in photogravure and are as good as anything of 
the kind yet printed in this country. The publishers merit a special 
word of congratulation for the way in which they have, brought ou-t this 
book. 
Monograph and Iconograph of the Native British Orchidaceae, 
by Col. M. J. Godfery. Cambridge University Press, xvL + 259 pp. 
and 57 coloured plates, ^7/7/-. Of late years many botanists have been 
attracted to the taxonomic problems presented by the almost limitless 
variation of the common British orchids. Workers in this field will 
welcome the publication of Colonel Godfery ’s monograph, which 
embodies the results of a long experience of the problems involved and of 
exhaustive enquiries in this country and on the continent. Though the 
vast amount of material embodied in the resulting volume will take a 
considerable time to assimilate and collate, it may be anticipated that 
this book will rank as the authoritative work on British orchids in general 
and on the status of many of our doubtful British forms. To the general 
botanist, the excellent chapters dealing with the structure and biology 
of orchids and of their flowers will undoubtedly appeal strongly. 
Possibly there may be some disappointment with the author’s decision 
to rank O. O’Kellyi merely as a form of O. maculata. In the North of 
England there are certainly many who regard O. O’Kellyi as distinct not 
only in its flower form but also in its ecological range. It must be 
admitted, however, that the treatment of the more variable orchids is 
quite consistent, and the wide experience of the author compels us to 
respect his conclusions. A new form of orchid for north country botanists 
is described for the first time. It is O. latifolia var. eborensis. It was 
found growing in a compact group near Helmsley and has since been 
discovered in Durham. The work is profusely illustrated and the 
illustrations are excellent, giving as they do the essential diagnostic 
characters. The publishers must have had a hard task in attempting to 
rival the beauty of Mrs. Godfery’s original water colour drawings, but, on 
the whole, they have been very successful. 
The Naturalist 
