158 Library. [JUNE, 



geometric interpretation of^Monge's differential equation to all conies is 

 that the radius of curvature of the aberrancy curve vanishes at every looint 

 of every conic. This geometrical interpretation satisfies all the tests 

 which every true geometrical interpretation ought to satisfy, and, it is 

 believed, we have at length got here the true interpretation which has 

 been sought for by mathema,ticians during the last thirty years, ever 

 since Boole wrote his now famous lines. 



The paper will be published in fall in the Journal, Part II, for 

 1888. 



6. Notes on Indian Rhynchota, Heteroptera, No. 5. — By E. F. T. 

 Atkinson, Esq., B. A. 



7. New Indian Rhynchota. — By E. F. T. Atkinson, Esq., B. A. 

 These papers will be published in full in the Journal, Part II. 



V 



IBRARY. 



The following additions have been made to the Library since the 

 meeting held in May 1888. 



Transactions^ Pi^oceedings and Jour^NALS, 



presented by the respective Societies and Editors. 



Amsterdam. Revue Coloniale Internationale, — Tome I, Nos. 1 — 6, 



Juillet— Decembre, 1885. Tome II, No. 1, Janvier, 1886. 

 Baltimore. Johns Hopkins University, — Circulars, Vol. VII, No. 65, 



April, 1888. 

 Batavia. Bataviaasch Genootschap van Kunsten en Wetenschappen. 



— Tijidschrift voor Indische Taal-, Land-en Volkenkunde, Deel XXXII, 



Aflevering 3. 

 Brussels. Musee Royal D'Histoire Naturelle de Belgique, — Bulletin, 



Tome V, No. 1. 

 Calcutta. Indian Engineering, — Vol. Ill, Nos. 18 — 22. 

 . The Indian Engineer, — Vol. V, Nos. 3 — 8, and Title-page and : 



Index to Vol. IV. 

 Cherbourg. La Societe Nationale des Sciences Naturelles et Mathemati- 



ques, — Memoires, Tome XXV. (^3^ serie-Tome V.) 

 Danzig. Der Naturforschenden Gessellschaft in Danzig,— Schrif ten, 



Neue Folge, Bande VII, Heft I. 

 Edinburgh. The Scottish Geographical Society, — Magazine, Vol. IV, 



No. 4, April, £888. 



