VULCANOLOGY AND SEISMOLOGY. 475 



explosion, aud there was no other volcanic eruption to which it could 

 be attributed, its connection with the known eruptions of Oraetepec or 

 of Cotopaxi or with some otherwise unnoticed submarine eruption being 

 considered and rejected. {Nature, xxxi: 483; La Nature, i: 3G2.) 



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

 Caiman Brae and KJrakatoa is admitted it does not follow that the noise 

 was propagated from Krakatoa through the globe. Both may have 

 originated from a disturbance taking place deep within the earth. 

 {Nature XXXI : 506.) Similar subterranean detonations were reported 

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

 Antioqnia, in Colombia. {Gompt. Rend., C: 1314, 1315.) 



Br. Fr. Schneider, of Soerabaya, has discussed {Jahrb. K. K. Geol. 

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

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

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

 quake 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 Temboro in 1815. After discussing 

 the probable mode of formation 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 

 recorded in their several districts. 



Prof. J. Kiessling, of Hamburg, and F. A. Forel have both published 

 valuable papers on the reddish corona about the sun. Both writers 

 conclude that there is no question of the connection of the ring with 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 before the Paris Academy on 

 the reappearance of the sunglows in the summer of 1885, think they are 

 not due to Krakatoa dust but to vapor of water. {Gompt. Rend., ci: 

 1032.) 



In Nature there is figured and described some of the apparatus bj" 

 means of which Professor Kiessling produced artificially effects similar 

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

 which a beam of light from a heliostat may be passed and within which 

 the desired condition of suspended dust or vapor may be produced. 

 {Nature, xxxi : 439.) 



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

 presented in the summer of 1885, by Feather Lake, Plumas County-, 

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

 volcanic eruption 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 scorise and lapilli covering the vent 

 is GOO feet high and of extremely i)erfect form, showing as yet no rain 

 channels even. For a space of foni- or five hnndred yards from it the 



