128 
amount of salts of various kinds thrown down and a con- 
centrated solution of others left. And this, in a few words 
is what I consider has occurred in the localities under con- 
sideration. f 
In conclusion I have only to say that as well persuaded 
as I am, that I am, in the main, right in my conjectures 
regarding the mode of formation of these interesting deposits, 
yet I earnestly and truly court criticism of my views from 
those who are better versed than myself in the geology and 
geography of this wonderful section of country. 
Mr. J. Hyatt made some further remarks with regard to 
the Aurora, showing that Aug. 19th, 1870, a brilliant display 
_was observed in this country. Aug. 20th, Auroras observed 
here and in Kurope. This was the great electric storm, con- 
tinuing for more than twenty-four hours and probably 
extending over more than 90° of Latitude. Sept. 3d and 
4th, Aurora light detected in the day time in England and 
Scotland. Also seen at night, Sept. 24th and 25th. 
Another great electric storm, the Auroral light noticed at 
Montreal and in Europe. Crimson light at Montreal. | 
Oct. 14th. Records of the Aurora in England and 
Treland. The Electric storm of Oct. 24th, 25th, was exten- 
sively observed in Kurope, from the west and south of 
which country numerous notices have been communicated to 
the papers. As to bands reaching across from the eastern to 
the western horizon, the foilowing indications appear: The 
Radcliffe observers speak of an arch of light in the vicinity 
of the equator, extending nearly from the eastern to the 
western horizon, and of two crimson sheets, one to the east, 
and the other to the west, with a connecting illuminated 
cirrus, south of the Zenith. 
In Devonshire, on the evening of Sept. 24th, there was 
observed first a bright band of white light 6° broad across 
the sky from W. 8. W. to K. N. KE. Afterwards a broader 
band of a fiery rose color, from about a degree north of the 
east point of the horizon, across the sky toward the west, 
and culminating at an altitude of 54° above the N. horizon. 
