LEHRBUCH DER PFLANZENKRANKHEITEN 828 
Ps the ine of the State, by MM. Durand and Schinz; and no 
e have independent volume dealing with a special holiness 
Manéerges: the oe of done ‘Contributions,’ although forming 
part of the same volume, are paged separately ; and it would seem 
that a fifth pxblientisn wil: ultimately be needed, in the shape of a 
general index to the other fou 
Apart from this iden, we have nothing but praise for the 
work hich 1 is doing so much to enlighten us on the botany of West 
Africa, and especially for the handsome and singularly cheap volume 
in which M. Thonner’s collections are figured and described. His 
expedition was made in 1896, in the Bangala district ; tis although 
he ‘dy collected 104 species, a fourth of these are new to science, 
while a similar number are new for the Congo region. M. Thonner 
contributes to the volume an account of his explorations, and the 
=o of the species has been undertaken by MM. de Wildeman 
e most remarkable featiit ure ® abont the book is its cheapness. 
with accompanying letterpress an ee , and strongly bound in 
cloth, can b d or the sum of eight francs, we do not 
understa We welcome the contribution as a further and im- 
contains descriptions of many rer ees Laer oe of the genera 
Rinorea, Cissus, and Urophyllum. We e that it is dated April, 
but the. copy sent to the Museum did be: . until the beginning 
of July; while the first fascicle, dated July 1899, did not come to 
hand until September of that year. At a time —e so many are 
publishing independentl ea ptions of new African plants, it is 
important that the i given nhoats be those at yk the publi- 
cations actually appea 
ee 
Lehrbuch der Pflanzenkrankheiten yon Dr. Rosert Hartie. 3rd * 
Berlin: Julius Springer. 1900. 8vo, pp. ix, 824; tab. 
yt? 280. 
published in 1894, and its usefulness and general trustworthiness 
came more widely r recognized in this country an and America. It 
is one a those books that are not only directly useful in themselves, 
used as mines into which many authors have dug more or 
less ie ie. I have read not a few “‘original”’ treatises which 
sth ppensigely Hartig with a few added facts. One can hardly 
praise a book more highly than that. 
