1882.] 



Presents. 



285 



these metals, and the same may be said with regard to the effects of the 

 permanent strains due to extension, torsion, &c. Longitudinal stress 

 which may be made to diminish considerably the susceptibility to 

 alteration of resistance from magnetisation, cannot even when carried 

 to the extent of causing breakage, change the nature of the alteration. 



There is apparently a close relationship between the " viscosity " of 

 a metal and its specific electrical resistance, and it see ms very pro- 

 bable that a full investigation of the former of these two physical 

 properties by the method of torsional vibrations would afford valuable 

 information respecting the latter. 



Presents, January 12, 1882. 



Transactions. 



London : — Anthropological Institute. Journal. Vol. X. No. 4. 



Vol. XI. Nos. 1, 2. 8vo. London 1881. The Institute. 



Art Union. Report, 1881. 8vo. London 1881. The Union. 



British Pharmaceutical Conference. Year-book of Pharmacy, 



1881. Svo. London 1881. The Conference. 



East India Association. Journal. Vol. XIII. Xo. 3. 8vo. 



London 1881. The Association. 



Entomological Society. Transactions. 1881. Part 4. 8vo. 



London. The Society. 



Linnean Society. Journal. Zoology. Vol. XVI. Xo. 89. 



Botany. Vol. XIX. Xos. 115-116. 8vo. London 1881, 



The Society. 



Royal Astronomical Society. Monthly Xotices. Vol. XLL Xos. 

 8, 9. Vol. XLII. Xo. 1. 8vo. London. The Society. 



Newcastle-upon-Tyne : — Xorth of England Institute of Mining 

 and Mechanical Engineers. An Account of the Strata of 

 Northumberland and Durham. 8vo. Newcastle-upon-Tyne 1878. 



The Institute. 



Paris : — Ecole des Hautes Etudes. Bibliotheque. Sciences Philo- 

 logiques et Historiques. Fasc. 45-49. 4to. and 8vo. Paris 1880- 

 t 81. The School. 



Ecole Xormale Superieure. Annales. Tome X. Xos. 8-12 et 

 Supplement. 4to. Paris 1881. The School. 



Institut de France. Academie des Sciences. Comptes Rendus. 

 Tome XCIL Tables. Tome XCIII. 4to. Paris 1881. 



The Institute. 



Museum d'Histoire Xaturelle. Xouvelles Archives. Serie 2. 

 TcmelV. 4to. Paris 1881. Rapports Annuels. 1879-80. Svo. 

 Paris 1880-81. The Museum. 



Societe d' Anthropologic Memoires. 2e Serie. Tome II. Fasc. 

 vol. XXXIII. x 



