249 Scientific Intelligence. 
played at 2p. m., and 9 an hour later, giving a fine display 
of seven eruptions each tim 
August 20.—A_ succession of seven eruptions, with intervals 
cphcmpeel same as last year, but not repeated. 
ng Sate 21.—Same as yesterda 
It appears, then, — in 1872, the e geyser often pie: ata 
single sere dain ith occasional successions of a s many as three, 
In 1875 there were a succession of five er uptions, and in 1881 
and 1882 there were iever less than seven genre and these 
were not unfrequently repeated an hour or two lat 
Giantess Geyser:—In 1872, as recorded by Dr. Peale (Hayden’s 
report, p. 149), there were three eruptions of ee Rhos seventeen 
minutes each, at intervals of ahah get of an hot 
n 1875, as observed by Dana and. Grinnell, the performance 
was as follows: After some peininety efforts, during w 
large amount of water was thrown out, there was an interval of 
‘tee it p ased twenty to ated feet, with occasional sprays up to 
150 feet for three-quarters of an hour, followed by an interval of 
about the same time. Continued to play with intermissions in 
same way up to midnight, and was still playing in morning an 
up to 12M. ——— sa when it ceased, and the crater was empty 
to a great dept 
August 13, 5. pe it began with a rumbling noise and shot 
up ‘ higher than Old Faithful, and then varied between 20 and 
150 feet for pen as of an aeae anc ad an intermission of 
cok 
1872 on Wesien ’s Report, 1872, p. 1 47). It eens to sod at 
irregular intervals, and, finally, within the last year, settled down 
e a constant - eriod of about two hours, It was impossible at 
r hasty visit to obtain measurements or even correct estimates 
of the p alas To of the crater, owing to the dense clouds of 
