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Ordinary Meeting, February 21st, 1882. 
Dr. R Angus Smith, F.R S., &c., in the Chair. 
Dr. Schuster, F.RS., exhibited and explained “Grants 
Arithmometer.” 
Ordinary Meeting, March 7th, 1882. 
Dr. R Angus Smith, F.RS., &c., in the Chair. 
“A Comparison between the Height of the rivers Elbe 
and Seine and the state of the Sun’s Surface as regards 
Spots,” by Professor Balfour Stewart, LL.D., F.RS. 
1. Certain results connected with the Nile and the Thames 
which were recently brought before me (see Nature , Jan. 
19, 1882) have led me to think that if we suppose there is 
a connexion between the state of the sun’s surface and the 
heights of rivers, the nature of this connexion will probably 
be best expressed by supposing that there are traces of a 
double as well as of a single fluctuation in river heights 
during a single sun-spot period. A. similar observation has, 
Proceedings — Lit. & Phil* Soc. — Yol. XXI.—No. 8.— Session 1881-2. 
