448 Presents. 



or in terms of jp, g, and with restoration of a, 



[Mar. 14, 



.(37). 



This agrees with the usual formula* for the transverse vibrations of 

 rods. Added April 3.] 



Presents, March 14, 1889. 

 Transactions. 



Bologna : Reale Accademia delle Scienze dell' Istituto. Memorie. 



Ser. 4. Tomo VIII. 4to. Bologna 1887. The Academy. 



Bordeaux : Societe des Sciences Physiques et Naturelles. Memoires. 



Ser. 3. Tome III. No. 2. 8vo. Paris 1887; Observations 



Pluviometriques et Thermometriques faites dans le Departe- 



ment de la Gironde, 1886-87. (Appendice au Tome III. des 



Memoires.) 8vo. Bordeaux 1887. The Society. 



Brussels : Societe Royale Malacologique de Belgique. Annales. 



Tome XXII. 8vo. Bruxelles [1888]; Proces-Verbaux des 



Seances. Annee 1888. 8vo. Bruxelles. The Society. 



Buenos Aires : Museo Nacional. Anales. Tomo III. Entrega 15. 



4to. Buenos Aires 1888. The Museum. 



Cambridge, Mass. : Harvard University. Bulletin. No. 42. 8vo. 



Cambridge 1889. The University. 



Cape Town : South African Philosophical Society. Transactions. 



Vol. IV. Parts 1-2. 8vo. Cape Town 1887-88. The Society. 

 Catania: Accademia Gioenia de Scienze Naturali. Bullettino 



Mensile. 1889. Fasc. 3. 8vo. Catania. The Academy. 



Frank fort- on -Oder: Naturwissenschaftlicher Verein. Monatliche 



Mittheilungen aus dem Gesammtgebiete der Naturwissen- 



schaften. Jahrg. VI. NT. 4-9. 8vo. [Frankfurt] 1888-89; 



Societatum Litterae. 1888. Nos. 6-10. Svo. [Frankfurt.] 



The Verein. 

 Geneva : Societe de Physique et d'Histoire Naturelle. Memoires. 



Tome XXX. Partie 1. 4to. Geneve 1888. The Society. 



Kew : Royal Gardens. Bulletin of Miscellaneous Information. 



Nos. 25-27. 8vo. London 1889. The Director. 



Klausenburg: Erdelyi Muzeum. Ertesito (SzakI) 1888. Evfolyam 



13. 8vo. Kolozsvdrt; Ertesito (Szak II) 1888. Evfolyam 13. 



Kolozsvdrt. The Museum, 



London : Photographic Society of Great Britain. Journal and 



Transactions. Vol. XIII. No. 5. 8vo. London 1889. 



The Society. 



* ' Theory of Sound,' 181. 



