32 
BOTANICAL NEWS. 
Dr. Alexander Dickson, of Edinburgh, has been appointed to the Chair of 
Botany in Trinity College, Dublin, vacant by the death of Professor W. 
Harvey. Our readers are acquainted with Dr. Dickson's important contri- 
butions to vegetable morphology, some of whicli have been published in this 
Journal. 
M. Th. Eulenstein (of Stuttgart), who has devoted many years to the inves- 
tigation of the Diatomacece, and is now engaged on a second edition of the 
Dlatomece in Pritchard's c Infusoria,' has undertaken to publish a series of au- 
thentic and original specimens, with a view to facilitate the identification of the 
numerous species established by foreign authors. The uncertainty of nomen- 
clature which has pervaded all writings subsequent to those of Ehrenberg and 
Kiitzing arises from a want of knowledge of their specimens, the greater propor- 
tion of which M. Eulenstein has obtained for the purpose of publication. Part I., 
containing Nos. 1 to 100, will consist chiefly of specimens select i h I from the herba- 
rium of Professor Kiitzing, and will explain many critical species established 
by that author in his c Bacillaria ' and ' Species Algarum.' The subsequent 
parts will contain original specimens illustrating the works of Ehrenberg, 
Heiberg, Grunow, Rabenhorst, and others. Besides the numerous new and 
rare forms which will be found in this series, it will furnish systematists witli a 
key to many species hitherto misunderstood, and so form an indispensable part 
of every scientific collection of Diatoms. The specimens are carefully prepared 
dry or in balsam, and neatly mounted on thin slides with ground edges, 3 in. 
by 1 in. The labels contain the original names with the localities, whilst a se- 
parate list of synonyms, with critical notes, will be published with Part V. 
The whole series is intended to consist of five parts, containing 100 specimens 
each. The price to subscribers is £4 for each part, but single parts cannot be 
supplied. In subscribing, a money-order for Part I., which will be sent out 
this month, may be added. The whole collection will appear during 1867. 
Simultaneously with this, a second series will be published with a view to fur- 
nish a standard collection of the types of the JDiatomacece. This series will 
contain typical representatives of nearly all the known genera, recent and fossil. 
It will consist of five parts, each containing 100 specimens, and will be i>sucd 
at the low price of £2 per part. A. Pritchard, Esq., 87, St, Paul's Road, 
Highbury, London, T$. f will give further information and receive subscriptions 
and money-orders for M. Eulenstein. 
At the meeting of the Scottish Arboriculture Society, on the 7th of Novem- 
ber last, Mr. J. Q-. Thomson, of Grantown, Inverness, reported that the Larch 
disease (Adelgis Laricis) had nearly left that part of the country, and that 
even the plants which had been affected some time ago were recovering and 
this season had made healthy and vigorous growths. Jle said the weather this 
year seems to have been very favourable for the growth of plants, as he had 
seldom seen so much young wood made in one season before, while seed of 
every kind is most abundant. 
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