336 The aaron Naturalist. [April, 
sation he reduced the copy to 844 pages of manuscript which, together : 
with the illustrations, makes an octavo of 612 pages. The report is 
confined almost exclusively to mining in the counties of California, the 
exceptions being a paper on Hydraulic Ejectors, by Mr. E. A. Wiltsee, 
and a dissertation upon American mining law, by A. H. Ricketts. 
The prefatory report of Mr. Ireland includes an interesting synopsis 
of the results of the geological investigations of the different field 
assistants. : 
The engravings for this report add materially to its value. 
Annual Report of the Canadian Geological Survey, 1890-91. 
—This volume, of 1,556 pages, consists of 13 separate reports, bound 
in two parts, with maps and illustrations descriptive of the geology, 
mineralogy and natural history of the various sections of the Dominion 
to which the several reports relate. These have been published sep- 
arately at intervals during the past two years, and abstracts of many 
of them have been given in previous numbers of this journal 
Eleventh Annual Report of the Director of the U. S. Geol. 
Surv.°—This volume contains a report of the work of the divisions 
of Hydrography and Engineering during 1889-90, the statement 
of the Director to the House Committee on Irrigation, the report 
of Mr. A. H. Thompson, geographer, and an account of the dis 
bursements of money. The statement of the Director comprises a gen- 
eral discussion of the problems of irrigation in the arid lands of the 
United States, and a résumé of the larger aspects of the problem, as 
well as other facts of general interest. : 
The text is illustrated by several maps and cuts of measuring instru- 
ments in use by the Survey. . 
Annual Report of the New Jersey Geological Survey for 
1892.'—The investigations carried on in the several departments of the 
Survey are embodied in the report of the State Geologist under re 
following heads: Surface Geology, R. D. Salisbury ; Cretaceous an 
and Tertiary Formations, W. B. Clark; Water-Supply and Water 
Annual Report Geological Survey of Canada, 1890-91, Vol. V. Parts 1 am du. 
Ottawa, 1893. 
* Eleventh Annual Report of the U. S. Geol. Surv. to the Secretary of the In 
1889-90. By J. W. Powell, Director. Part II, Irrigation. Washington, 1891. J 
‘Annual Report of the State Geologist of New Jersey for 1892. Trenton, 1i: <" 
1893. 
terior, 
