AT the general meeting of the Danish Botanical Society in 1912 it was decided to publish in the future two distinct journals. One of these is the Botanisk Tidsskrift, the society's old periodical, which has reached its thirty-third volume, and contains chiefly papers on the Danish flora, besides articles on subjects of more general botanical interest. This will continue on its former lines, being written mostly in Danish, though occasionally—much too rarely, it may be said, for non-Danish readers—with abstracts in English, French, or German. The second journal is a new venture, the Dansk Botanisk Arkiv, published at indefinite periods, and containing monographs and other special articles in either of the four languages mentioned. Both journals are sent post free to members of the society, membership being open to all on payment of 10 kronen (11s.) a year; the subscription for the Botanisk Tidsskrift alone is 6 kronen, and the numbers of the Arkiv may be purchased separately. We have received from the society copies of the 1913 numbers of the new journal, and some of those of the old one, besides two reprints from the Mindeskrift for Japetus Steenstrup, published in 1913 and 1914,
Experimentaluntersuchung zur Messung von Erderschtterungen. By Prof. L. Grunmach . Pp. 102. (Berlin: Leonhard Simion Nf., 1913.