xl. ABSTRACT OF PROCEEDINGS. 



eucalyptol nor phellandrene, it was entirely different in appear- 

 ance and constituents from ordinary Eucalyptus oil. It formed 

 a clear solution with two volumes of 70 per cent, alcohol, it had 

 an optical rotation of +36° in a 100mm. tube, and specific 

 gravity at 15° C. of -9245, the comparatively high specific gravity 

 being due to the presence of the stearoptene. 



EXHIBITS. 



Dr. F. H. Quaife exhibited a modification of the Wehnelt 

 interrupter to obviate the cracking of the glass tube by keeping 

 the metal conductor inside it cool, and to cause, if a crack occurs 

 in the glass, any acid to be driven out by electrolysis and so to 

 prevent corrosion. This was shown in action by a storage battery 

 giving 36 volts and 9 amperes. The peculiar ribbon-like spark 

 between the points of the coil as well as the ordinary lightning 

 sparks in streams were shown, and also the screen shadows of 

 *he X rays. A Watson's Penetrator tube was used with a wet 

 lint cover at the negative electrode. 



Mr. W. M. Hamlet exhibited a new form of Phonograph. 



The following donations were laid upon the table and acknow- 

 ledged : — 



TRANSACTIONS, JOURNALS, REPORTS, &c. 



(The Names of the Donors are in Italics.) 



Berlin — Centralbureau der Internationalen Erdmessung. 

 Bericht iiber den Stand der Erforschung der Breiten- 

 variation am Schiusse des Jahres 1899 von Th. Albrecht. 

 Veroffentlickung, Neue Folge, No. 2, 1900. The Bureau 



Gesellschaft fur Erdlnmde. Verhandlungen, Band xxvi., 

 Nos. 5 - 10, 1899 ; Band xxvn., Nos. 1-5, 1900. Zeit- 

 schrift, Band xxxiv., Nos. 1-6, 1899 ; Band xxxv., No. 

 1, 1900. The Society 



Koniglich preussisehe Akademie der Wissenschaften. Sit- 



zungsberichte, Nos. 39 - 53, 1899 . Nos. 1 - 38, 1900. The Academy 



Koniglich preussisehe Meteorologische Instituts. Bericht 

 liber die Thatigkeit im Jahre, 1899. Ergebnisse der 

 Beobachtungen an den Stationen u. und in. Ordnung, 

 Heft 3, 1895; Heft 1, 2, 1899. Ergebnisse der Nieder- 

 schlags-Beobachtungen in den Jahren 1895 und 1896. 

 Ergebnisse der Ge witter- Beobachtungen im Jahre 1897. 



The Institute 



