252 Scientific Intelligence. 



cusses the singing and other sound-producing instincts and their 

 significance in connection with wooing, pairing, etc. s. i. s. 



x 4. The 0. S. U. Naturalist, published by the Biological Club of 

 v the Ohio State University. — This new journal, commenced in 

 November, 1900, and to be published monthly from November to 

 June (50 cts. per year), is to be devoted especially to the Natural 

 History of Ohio. The editor-in-chief is Prof. John H. Scbaffner; 

 he is aided by associate editors in five different departments. 

 The numbers already issued contain, among others, several inter- 

 esting botanical papers. 



5. OstwalcVs Elassiker der Exakten Wissenschaften. Leipzig, 

 1900 (Wilhelm Engelmann). — The following are recent additions 

 to this series of Scientific Classics, which becomes continually 

 more valuable as it gains more and more completeness. 



Nr. 5. Allgemeine Flachentheorie (Disquisitiones Generates circa Superficies 

 Curvas); vod Carl Friedrich Gauss (1827). Pp. 64. 



Nr. 114. Briefe uber Thierische Elektricitat: von Alessandro Volta (1792). 

 Pp. 161. 



Nr. 115. Versuch uber die Hygrometrie. I Heft. I. Versuch Beschreibung 

 eines neuen vergleichbaren Hygrometers. II. Versuch Theorie der Hygrometrie. 

 von Horace Benedicte des Saussure. Pp. 168. 



Nr. 116. Die Darstellung ganz willkurlicher Funktionen durch Sinus- und 

 Cosinusreihen ; von Lejeune Dirichlet (1837) und Note liber eine Eigensohaft der 

 Reilien, welche discontinuirliche Functionen darstellung; von Philipp Ludwig 

 Seidel (1847). Pp 58. 



Nr. 117. Darstellende Geometrie von Gaspard Monge. (1798) Ubersetzt und 

 herausgegeben von Robert Haussner. Pp. 217. 



Nr. 118. Galvanismus und Entdeckung des Saulenapparates 1796 bis 1800. 

 Von Alesandro Volta. Pp. 99. 



6. The Director- General of the Geological Survey of the 

 United Kingdom. — The announcement has just reached us 

 (January 15th) that Sir Archibald Geikie has intimated his inten- 

 tion to retire from the post of Director-General of the Geological 

 Survey of the United Kingdom, an office which he has so ably 

 filled for the past twenty years, on March 1st next. In 1855, at 

 the age of 20, Sir A. Geikie became an Assistant on the Geolog- 

 ical Survey of Scotland, and he was made Director for Scotland 

 in 1867. In 1881 he was appointed to succeed Sir Andrew 

 Ramsay as Director-General of the Geological Survey of the 

 United Kingdom. He has seen forty-six years' service, but is 

 now only in his 66th year. We rejoice to learn that Sir A. 

 Geikie has no intention of retiring lrom active participation in 

 geological work, and that neither his hammer nor his pen are to 

 be laid aside for some years to come. — Geol. Mag., February, 1901. 



