298 EECOKD OF SCIENCE FOK •I886. 



Central America, 2; West Indies, 2; Ecuador, Ij Peru and Chili, 3; 

 Argentine Kepublic, 1. As so many shocks occurred in California a 

 small earthquake map of that State for the year is given, which shows 

 that the Bay of San Francisco is in a particularly shaky region, that 

 city having been within the area of five distinct earthquakes during the 

 year. The author has again assigned an intensity to each earthquake, 

 using the liossi-Forel scale in combination with the one j^reviously 

 proposed by him (Am. Jour. Sci., xxix, 426), and which, having been 

 adoi)ted by the U. S. Geological Survey, is coming to be known as the 

 American scale. Those earthquakes estimated as haviug an intensity 

 of VI Eossi-Forel or over were — 



(VI.)— March 30, Argentine Republic; March 30, April 11, July 23, 



California. 

 (VII.) — Februarys, Mexico; July 31, California. 

 (IX.) — October 11, Nicaragua; December 18, Guatemala. 



Forty-three dates are added for 1883 and 1884, all but one being in 

 the latter year, and mainly taken from Detaille's lists in L'Astronomie. 



M. C. Detaille contributes to L'Astronomie (p. 216) a list of earth- 

 quakes felt in 1885, being the third article of similar character from him. 

 It gives 246 items in all, of which 35 are American. The largest 

 number (4;)) occurred in January; the smallest (11) in October. For 

 the other months the numbers are as follows : February, 18; March, 15 ; 

 Ai)ril, 19 ; May, 14; June, 29 ; July, 23 ; August, 13; September, 16 ; 

 iNOvember, .6; December, 23. Of the American items only six are con- 

 tained in Eockwood's lists, seventeen being from Venezuela and five 

 from Valparaiso. After commenting on a few special earthquakes of 

 1885, he adds a list of thirteen earthquakes which occurred in Austra- 

 lia, Tasmania, and New Zealand from December 1, 1883, to December 1, 

 1884; notices some recent literature and gives the Rossi-Forel scale 

 adopted by the Swiss Commission and now in quite general use. 



The Croatian Eartliquake Commission, by M. Rispatic, published in 

 1885 (Verh. K. K. Geol. Reichsanst.) a report on the shocks of 1883. It 

 enumerates forty-five shocks occurring on thirty-seven days. The great- 

 est number of shocks occurred in Agram, where there were in all six- 

 teen earthquake days. The origin of nearly all is referred to the mount- 

 ains northeast of Agram (Gaea. xxii : 58). 



Dr. C. W. C. Fuchs has collected the records of earthquakes from his 

 various annual reports, arranged them according to countries and pub- 

 lished the whole under the title " Statistik der Erdbeben, 1865-85 " in 

 the ninety-second volume of the Sitzungsberichte of the Vienna Acad 

 emy ; so that the statistics for any particular locality for the whole 

 twenty years are now easily available to the student. It forms another 

 chapter in the general earthquake cataloguein which Mallet and Perrey 

 have preceded him. In order that the lists for different countries may 

 be comparable one with another, Dr. Fuchs has included in his pres- 

 ent lists only those shocks which were sensible without instruments; 



