1887.] 



Presents. 



131 



of them fall near lines in the spectra of my G/3 and G<5. At first 

 sight it might appear that his and my spectra were due to the 

 same bodies, but according to M. de Boisbaudran, the chemical pro- 

 perties of the earths producing them are widely distinct. These 

 giving phosphorescent lines by my method occur at the yttrium 

 extremity of the fractionation, where his fluorescent bands are scarcely 

 shown at all ; whilst his fluorescent phenomena are at their maxi- 

 mum quite at the terbium end of the fractionation, where no yttrium 

 can be detected even by the direct spark, and where my phospho- 

 rescent lines are almost absent. 



Presents, February 17, 1887. 



Transactions. 



Bordeaux : — Societe de Medecine et de Chirurgie. Memoires et 

 Bulletins. 1886. Fasc. 1-2. 8vo. Bordeaux. The Society. 



Brisbane : — Geographical Society of Australasia. Queensland 

 Branch. Proceedings. Yol. I. Session 1885-86. 8vo. Brisbane 



1886. The Society. 

 Brussels : — Musee Royal d'Histoire Naturelle de Belgique. Bulletin. 



Tome IV. No. 4. 8vo. Bruxelles 1886. The Museum. 



Erlangen : — Physikalisch-Medizinische Societat. Sitzungsberichte. 



Heft 18. 8vo. Erlangen 1886. The Society. 



Kingston, Canada :— University of Queen's College. Calendar. 

 1886-87. 8vo. Toronto 1886 ; Examination Papers. 1886. 8vo. 

 Toronto. The University. 



London: — East India Association. Journal. Yol. XIX. No. 1. 8vo. 

 London 1887. The Association. 



Odontological Society. Transactions. Yol. XIX. No. 3. 8vo. 



London 1887. ' The Society. 



Pharmaceutical Society. Calendar. 1887. 8vo. London. 



The Society. 



Photographic Society. Journal and Transactions. Yol. XI. No. 4. . 



8vo. London 1887. The Society. 



Royal College of Physicians. List of Fellows, &c. 8vo. London 



1887. The College. 

 Royal Institute of British Architects. Journal of Proceedings. 



Yol. III. No. 8. 4to. London 1887. The Institute. 



Statistical Society. Journal. Yol. XLIX. Part 4. 8vo. London 



1886. The Society. ' 



University College. Catalogue of Books in the Medical and 



Biological Libraries. 8vo. London 1887. The College. 



Louvain : — Universite Catholique. Annuaire. 1887. l2mo. Louvain; 



Theses. 1885-86. 8vo. Louvain; Recherches Analytiques sur 



la Diffraction de la Lumiere. 4to. Bruxelles 1886: Sur les 



