VULCANOLOGY AND SKISMOLOGY, 



By C. G. RocKWOOD, Jr., 



'Professor of Mathematics in the College of Neic Jersey, Princeton, X. J. 



In cousequeuce of the early publication of this isuiumaiy it has been 

 impossible to make it as full as the author had inteuded, especially with 

 respect to foreign publications. In its preparation the following have 

 been carefully examined, viz: Science, vols, v, Vi; Nature, vols, xxxi, 

 xxxii ; American Journal of Science, (III,) vols, xxix, xxx ; CompU-s 

 RenduH, vols, o, ci ; La Nature, 13th year, vols, i, ii: L'Astronomie, 4th 

 year; Neu Jahrbuch fur Mlneralcgie, etc., 1885; Transactions Scisiiio- 

 loffical Society of Japan, vol. Tin ; Proceedings American Associatitm 

 for Advancement of Science^ vol. xxxiii. In respect to these the bibli- 

 ography may be regarded as comj)lete, and all important articles are 

 noticed in the summary. Other periodicals and books have been con- 

 sulted as opportunity offered, but without a full t-xaminatiou. The 

 bibliography attached to the present summary also contains some titles 

 which properly should have been included in that of last year, but which 

 had not then come to the author's notice ; and in like manner omissions 

 in the present list will be supplied, so far as possible, in a future issue. 



The subject-matter will be arranged under the following heads : 



Vulcnnology. 



Volcanic phenomena of 1885. 

 Volcanic phenomena of previous years. 

 Causes of volcanic action. 



Seismology. 



Earthquakes of 1885. 



Earthquake lists of 1884. 



Earthquake catalogues of previous years. 



Study of earthquakes. 



Seismometry. 

 Instruments and their records. 



