Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

164504 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 6408, results 160176 - 160200

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Geologic structure and occurrence of gas in part of southwestern New York
Wilmot H. Bradley, James F. Pepper, G. B. Richardson
1941, Bulletin 899
The area covered by this report is in southwestern New York and includes a little more than 3,000 square miles in Steuben and Yates counties and parts of the six adjacent counties. This area has been mapped to determine the structural attitude of the exposed rocks, so as to aid...
Experiments upon the control of Trichodiniasis of salmonid fishes by the prolonged recirculation of formalin solutions
Frederic F. Fish, Roger E. Burrows
1940, Transactions of the American Fisheries Society (69) 94-100
In a search for more effective disinfectants to combat parasitic diseases of hatchery fish, the authors report results from a series of experiments designed to determine the toxicity of varying exposures to concentrations of formalin, sodium p‐phenolsulphonate, ammonium sulphate, and sodium benzoate. Non‐toxic concentrations of these disinfectants were tested, in...
An evaluation of trout culture
1940, Transactions of the American Fisheries Society (69) 85-89
In an evaluation of the efficiency of trout culture, the author presents a detailed analysis of complete loss records from 288 individual lots of trout at twenty-two hatcheries in the western United States. Summarized data are given to show the percentage loss of eggs, fry, and fingerlings by progressive one-half...
Calomel versus carbarsone
F. F. Fish, D.L. McKernan
1940, Progressive Fish-Culturist (7) 26-29
No parasite common to hatchery salmon and trout possesses quite so varied a reputation as does Octomitus salmonis. Discovered, studied, and described independently, but essentially simultaneously, by Dr. Emmeline Moore and Dr. H. S. Davis, Octomitus salmonis was introduced to fish culture during the early twenties. This easily found and widely...
Formalin for external protozoan parasites: A report on the prevention and control of Costia necatrix
Frederick S. Fisher
1940, Progressive Fish-Culturist (7) 1-10
The smallest and most destructive of the ectoparasitic protozoans infecting salmon and trout, Costia necatrix, has unfortunately been relegated to virtual obscurity during the past few years. Few references to this parasite can be found in the recent literature and, where such things are discussed, one seldom hears a mention of Costia...
The gold quartz veins of Grass Valley, California
W. D. Johnston Jr.
1940, Professional Paper 194
The gold quartz veins in the vicinity of Grass Valley, Calif., have been actively mined since the fifties of the nineteenth century. Lindgren mapped the areal geology and studied the mines of the district in 1894, and the accompanying geologic map (pl. 1) is reproduced from his reports. Since then...