1887.] Library. 235 



The thirty-second section discusses the locus of the middle point of 

 the polar-chord of a conic with respect to points situated on any curve ; 

 and, at the end of this section, the method of Elliptic Inversion is 

 mentioned. This completes the analysis of the memoir, so far as it is 

 at present ready for publication. 



The paper will be published in full in Part II of the Journal 

 for 1887. 



Libera r\Y. 



The following additions have been made to the Library since the 

 Meeting held in August last. 



Transactions, Proceedings and journals, 



presented by the respective Societies and Editors. 

 Amsterdam. Der Koninklijke Akademie van Wetenschappen, — Jaar- 



bock, 1885. 

 . . Verslagen en Mededeelingen, Afd 



Letterkunde, Derde Reeks, Deel III. 

 . . . Afd Natuurkunde, Derke 



Reeks, Deel II. 

 , Revue Ooloniale Internationale, — Tome V, Nos. 2 — 4, 



Aout— Oct, 1887. 

 Baltimore. American Chemical Journal, — Vol. IX, Nos. 3 and 4, June 



and August, 1887. 

 . American Journal of Philology, — Yol. VIII, No. 2, July, 



1887. 



•. Johns Hopkins University, — Circulars, Vol. VI, No. 58, 



July 1887. 



— . Studies from the Biological Laboratory, 



Vol. IV, Nos. 1 and 2. 

 Batavia. Bataviaasch Genootschap van Kunsten en Wetenschappen, 



Notulen, Deel XXV, Aflevering 2. 



. . . Tijdschrift, Dal XXXII, Aflevering 1. 



Berlin. Berliner Entomologische Zeitschrift, Band XXXI, Heft 1. 

 . Der Koniglichen Akademie der Wissenschaften zu Berlin, — 



Abhandlungen, 1886. 

 t — . Sitzungsberichte, 40 — 53, 1886, and Inhalt, 



1886, 



