770 KANSAS CITY REVIEW OF SCIENCE. 
Atlantic and Pacific, various States, granted 1866, 42,000,000 acres. 
Texas Pacific, various States, granted 1868 and 1874, 18,000,000 acres. 
Northern Pacific, various States, granted 1864, 47,000,000 acres. 
SEPARATING GOLD, SILVER, AND COPPER ALLOY BY ELECTROL— 
YSIS. 
Among the later inventions well worthy of the attention of metallurgists, is 
the electrolytical process of refining, patented by E. André, both in this country 
and in Europe. ‘This process has not been practically applied in this country, 
but is said to be in operation at the copper works of Messrs. Mason & Elkington, 
Pembrey, South Wales; at Birmingham and Manchester, England; the govern- 
ment works at Mahsfeld, Ocker, and Duisburg, Germany, and the refining works 
at Hamburg and Frankfort-on-the-Main. The results obtained at these works 
are said to be of the most satisfactory nature, and with the improvements of the ~ 
dynamo-electro machine, which are continually making, even better results are 
expected in the future. This process is said to completely extract, more econom- 
ically than by other means, the precious metals from their base alloys, and sep- 
arate the latter in a chemically pure metallic form. Mr. André employs the cur- 
rent of the dynamo-electric machine on the material to be separated as anodes 
suspended in diaphragms in a diluted acid or alkaline bath, according to circum- 
stances. When the disintegration of the alloys occurs, the precious metals are re- 
tained in the diaphragms, and the baser metals are deposited in a pure metallic 
state upon the cathodes placed opposite the anodes. The bath is changed at proper 
times, to free it from accumulated impurities, such as zinc, iron, antimony, etc. 
—FLngineering and Mining Journal. 
MISSOURI WATER POWER. 
Had Missouri been peopled for the last sixty years by the overflow of popu- 
lation from New England, she would doubtless be a manufacturing prodigy. The 
motors with which nature has furnished her so lavishly, would by this time have 
been turned to full account, and would be famous as the agents of an enormous 
productiveness in a great variety of lines. No eastern State is credited with hav- 
ing such an aggregate volume of available water power as investigation shows 
Missouri to possess. Yet her labyrinth of rapid dashing streams, and her multi- 
tude of perennial springs, have scarcely any reputation away from their own neigh- 
borhoods. Probably few Missourians have an adequate conception of the amount 
of energy which is daily going to waste through the State, in the shape of unused 
. but valuable water power. But only when Missouri is thoroughly canvassed can 
the possessions of her 113 counties be fully realized. 
The southern half of the State is abundantly supplied with large springs; yet 
