0 mil liological C h roii id c 
This book is the fruit of the Ujii^ experience of the 
autlior, ami ah ])eo])le who possess 1)ir(ls in ca^es or aviaries 
will consult it with profit ; the low price of the book puts it 
within reach of everybody. The advice on " I ly.i;iene and 
fcedini; of birds " is excellent; everythin;;- is put there in a clear 
and concise style; then follow descriptions of " indis^enous 
birds." with interesting' remarks on their habits and hints on 
how to feed and care for theni : next, birds of culture," 
canaries, crosses and hybrids; linally, the " foreii;n birds" 
which arc usually kept in captivity are passed in revue. The 
interest of the book lies in the fact that it is the result of the 
personal observations of the author. You do not find in it, 
as is too often the case in such works, tlKjsj " repetitions," often 
wront;'. which are circulated for years. The naniinn' of the 
species described must also be praised. 
The A gricHltiiral Ornithology by George (luenaux, 
published in the library of J. B. Bailliere and Sons, is an 
excellent practical work, illustrate' 1 li r.umerous drawings, 
which will be of great use to all those interested in the birds of 
our fields. After zoological generalities on the bird, which 
everybody should know, all the indigenous birds are reviewed, 
their habits described, and their degree of utility or destructive- 
ness made conspicuous. The book is concluded by a study of 
the protection of birds. The question is very well set forth, 
and the good cause impartially defended. 
The Zoolcjgical Park of .\'ew \'ork received in 1919, from 
its study station in British (iuiana, a splendid * C"oc[-de-roche 
{Rupicola rnpicola). Cocis-de-roche are certainly delicate in 
captivity. Dr. Chambers-]\litchell gives the average length 
of time that they live in captivity according to the eight speci- 
mens which lived in the Zoological Gardens, London; it is from 
eight and a half months, with a maximum of twenty months, 
the life in captivity of these splendid but rare birds consi(leral)lv. 
Yet it seems certain that with i)lcnty of fruit one could i)rolong 
M. R. Pauwels of Everberg once possessed a fine specimen, in 
excellent condition, which preserved intact its beautiful orange 
colour. 
The EDiTf)R, L. MARETHEUX. 
* Cock of the Rock.— Ed. B,X. 
