260 The American Geologist. October, isa? 
Dr. Phinney's work was done under the general supervision of Mr. 
McGee, who contributes an introductory discussion of 28 pages, be- 
yond which the memoir comprises 12G pages, with 5 plates, treating of 
the geologic structure of Indiana, the conditions of gas accumulation, 
gas pressure and its measurement, the gas field, with records of the bor- 
ings within it and also outside of its area, and the care of gas wells. 
The second part and volume of this report presents the work of the 
U. S. Irrigation Survey, giving details of the hydrography and capabil- 
ities for irrigation of a large number of river systems in the great arid re- 
gion of the western half of our national domain, including portions of the 
upper Missouri and Yellowstone basins, the South Platte and Arkansas 
basins in Colorado, the Rio Grande basin in Colorado, New Mexico and 
Texas, the Gila basin in Arizona, the Truckee and Carson basins of the 
lake Lahontan district in California and Nevada, and the Snake river 
basin in Idaho and Oregon. 
Mineral Resources of the United States, calendar year 1891. By 
David T. Day, chief of the Division of Mining Statistics and Tech- 
nology, U. S. Geol. Survey, pp. vii, 030. Washington, 1893. Price 50 
cents. In the summary given at the beginning of this report, previous 
to its detailed accounts of all our mining industries, the total value of 
the year's metallic product of the United States is given as $302,307,922, 
of which the following are the seven principal products: pig iron, 
$128,337,985; silver, $75,416,505; gold, §33,175,000; copper, §38,155,300; 
lead, §17,609,322; zinc, $8,033,700; and quicksilver, $1,036,386. The five 
other metals mentioned are each produced in comparatively small 
amounts, namely, aluminum, $100,000; nickel, $71,099; tin, $25,058; 
antimony, $47,007; and platinum, $500. 
The total value of the non-metallic products is stated to be $353,790,- 
416, of which the twelve leading products are: bituminous coal, $117,- 
188,400; Pennsylvania anthracite, $73,944,735; building stone, $47,294,- 
746; petroleum, $32,575,188; lime, $35,000,000; natural gas, $15,500,084. 
cement, $6,680,951; salt, $4,716,121; phosphate rock, $3,651,150; limestone 
for iron flux, $2,300,000; mineral waters, $2,990,259; zinc white, $1,600,000. 
The production of pig iron was one-fifth less than in 1890; but silver, 
gold, copper, lead, and zinc, each show some increase. There was also 
an increase in the production of bituminous and anthracite coal, phos- 
phate rock, and mineral waters; but natural gas decreased from 
$18,742,725 in 1890. 
Second Report of the Bureau of Mines, for 1892, printed by order 
of the legislative assembly of Ontario. By Archibald Blue, Di- 
rector, pp. v, 264. Toronto, 1893. This is a very full statement of the 
present condition of all mining interests and mineral resources of the 
Province of Ontario. Its summary of mineral production gives a total 
value of $5,374,139, which exceeds that for 1891 by $668,466, the princi- 
pal increase being in nickel and copper. Separate values of the chief 
products are as follows: nickel, $590,902; copper, $232,135; quarried 
stone, $880,000; lime, $350,000; brick, $1,210,600; drain tile, $100,000; 
