80 THE JOURNAL OF BOTANY 
which he has planned and carried out with such conspicuous 
success; he could, however, have had no more competent editor 
than Mr. Hemsley. 
Fungus Diseases A sore Trees in Australia and their Treatment. 
By D. McAurine. Government Press, Melbourne, 1902. 
re 165. Ten coloured plates, 327 figures 
E time ago, Mr. McAlpine, the Government Vegetable Patho- 
logist of Victoria, published an account of the fungi that are to be 
found on citrus trees; he has gd ed an equally exhaustive 
account of the fungi that have "beds found growing on almond, 
apricot, cherry, peach, and plum trees. The first part of the work 
deals with a general account of the diseases due to attacks of fungi. 
He advises as to the kinds of fruit-tree that have proved resistent 
to attack, and gives Sancta! instructions how to prepare and apply 
fungicides or any other method of cure deemed advisable in the 
case of trees that have become diseased. The second part gives a 
technical description of the various fungi. The author enumerates 
no less than one hundred and seventeen species a large proportion 
of which are new to science.- The grower will be relieved to find 
that of this alarming number only tiny rhe are parasitic; the 
others are saprophytes and harmles alphabetical list. is 
printed, indicating their Ppnat- pa is somewhat surprising to find 
Asperyilius glaucus Link, one of o ost common saprophytes, 
uring as a parasite ; Mr. ak Ipies ends that it penetrates the fruit 
of the apricot, causing ‘‘ mouldy core.” Hypholoma fasctculare, a 
ubiquitous agaric, has also been regarded hitherto as a parasite, 
but he finds it Ceseey ine the roots of the cberry-trees, and he also 
reports it as doing damage to the roots of pberry. 
The author has slacetfind the fungi according to their habitat on 
ore ae Agee or fruit, and he gives lists of those to be foun 
each The matter is arranged to enable the cultivator 
eS identity “the pests ‘that threaten to destroy his trees, and the 
coloured plates give a graphic representation of the commoner 
diseases. Besides its importance to fruit-growers, the whole book 
forms a valuable addition to our knowledge of plant-pathology. 
ACRES. 
BOOK-NOTES, NEWS, ée. 
Ar the eE: of the Linnean Society on 20th November, 
Professor §. H. Vines continued the account of his observations 
upon the action of the enzyme contained in the secretion of 
Nepenthes which are apitounieee i in this Journal for 1902, p. 47. 
Since that time many other plants have been investigated with the 
object of rere (1) whether or not a digestive enzyme were 
pete pire: and (2) of determining the nature of its action. In almost 
re known to possess 
a peptonizing enzyme were made the sabes of experiment, with 
