VULCANOLOGY AND SEISMOLOGY. J 75 



♦ixplosioii, and tlierc^ was no otlier volc'-aiiic eruption to wliicli it (((uld 

 be attributed, its connection with the known eruptions of On)etepe(; or 

 of Cotoi)axi or witli some otlierwise unnoticed submarine eruption being 

 considered and rejected. {Nature, xxxi: 483; La Nature, i: 362.) 



Mr. Henry Cecil suggests that if the synchronism of these noises at 

 (Jainian Brae, and Krakatoa is admitted it does not folh)w that the noise 

 was propagated from Krakatoa through the gh)be. Both may have 

 originated from a disturbance taking ])hu;e deep within the earth. 

 {.Vatxri' xxw: ")()(>.) Simihir subterranean detonations were reported 

 as lieard on August "27 and 28 in San Domingo, in San Salvador, and at 

 ATitio(|uia, in Colombia. {Compt. Rend.,v,: 1314,1315.) 



Dr. Fr. Scimeider, of Soerabaya, lias discussed {Jahrb. K. K. Geol. 

 Keichsanfit. Wien, 1885) the volcanic condition of the Sunda Islands and 

 the jMoluccas, and thinks that the importance of the Krakatoa eruption 

 has been greatly overestimated. Whetber in the extent of its earth- 

 (]uake circle, the amount of ashes thrown out, or the distance to which 

 the ashes were thrown, it has been much surpassed by other volcanoes 

 of Java, notably by the eruption of Teniboro in 1815. xVfter discussing 

 the probable mode of lY)rmation of Java by the junction of three islands 

 once separate, he describes in some detail the position and relations of 

 the principal Javan volcanoes, especially in relation to the earthquakes 

 lecorded in their several districts. 



Tiof. J.Kiessling, of Hamburg, and V. A. Forel have both published 

 \ aiuable pai)ers on the reddish corona about the sun. Both writers 

 conclude that there is no question of the coiniection of the ringwith the 

 famous sunset glows and of the origin of both of these phenomena in 

 the dust cloud thrown out from Krakatoa. {Science, vi : 159.) 



J. Denza and also A.Boil.'ot, commenting betore the Paris Academy on 

 the reap])earance of the snnglows in the summer of 1885, think they are 

 «o^ due to Krakatoa dust but to vapor of water. {Conrpt. Iie^uL, Cl: 

 1032.) 



In Nature there is figured and described some of the apparatus by 

 means of which Professor Kiessling produced artificially effects similar 

 to the (doud glows. It consists essentially of a glass globe through 

 which a beam of light from aheliostat ?nay be passed and within which 

 the desired condition of susi)ended dust or vapor may be produced. 

 {Nature, xxxi: 439.) 



C. E. Dutton describes, from personal observation, the appearance 

 l)resented in the summer of 1885, by Feather Lake, Plumas County, 

 California. This was thought to have been the scene of the most recent 

 volcanic ern|)tion within the limits of the United States, stated by J. 

 B. Trask to have occurred in 1850. The lava emitted forms a field about 

 three and a quarter miles long by one mile wide, with* an average thick- 

 ness of over 100 feet. The cone of scoriae and lapilli covering the vent 

 is (100 feet high and of extrcimely j)erfect form, showing as yet no rain 

 channels even. I'or a space of four or live hundred yards from it tlie 



