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Articles 53701 - 53730 of 53917
Full-Text Articles in Life Sciences
Possibility Of An Additional Meteorite Crater Near Odessa, Texas, John D. Boon, Claude C. Albritton Jr.
Possibility Of An Additional Meteorite Crater Near Odessa, Texas, John D. Boon, Claude C. Albritton Jr.
Field and Laboratory
In the vicinity of Odessa meteorite crater are a number of sinks which, viewed from the air, closely resemble the crater in plan and general configuration. It is suggested that at least one of these sinks may be a meteorite crater modified, since the time of its formation, by the solvent action of ground water on the underlying bedrock.
Sequent Occupance In The Central City Area, Colorado, Mary Grace Gillespie
Sequent Occupance In The Central City Area, Colorado, Mary Grace Gillespie
Field and Laboratory
Man's desire for the precious metals has taken him into remote areas of the earth. This untiring search for gold lead to the exploration of the canyons of the Rocky Mountains. In 1859 there appeared in an isolated mountain valley of northern Colorado, a small settlement, later to be known as Central City, that boomed suddenly, lived brilliantly, and died quickly, only to be revived in 1932.
Petroglyph And Pictograph Site In The Finlay Mountains, Dodd N. Osburn
Petroglyph And Pictograph Site In The Finlay Mountains, Dodd N. Osburn
Field and Laboratory
In the Finlay Mountains at longitude 105° 39' west, and latitude 31° 23' north, Fort Hancock Sheet, Texas, there is a former Indian campsite located on the steeper face of a cuesta fronting the east. Crude natural shelters are formed by many of the boulders which bestrew the cuesta face. They were derived from the cap rock of Cox sandstone. Many of these boulders and the face of the cliff formed by the cap rock are covered with petroglyphs.
Free Radicals, Joe Adams
Free Radicals, Joe Adams
Field and Laboratory
Free radicals are complexes of abnormal valency, which possess additive properties, but do not carry an electrical charge and are not free ions. Since Lavoisier introduced his theory of radicals in 1785 there has been the conviction among chemists that the radicals of organic chemistry could be isolated in the free state.
Distributional Notes On Atrytone Dion, Race Alabamae Lindsey (Lepidoptera, Rhopalocera, Hesperiidae), H. A. Freeman
Distributional Notes On Atrytone Dion, Race Alabamae Lindsey (Lepidoptera, Rhopalocera, Hesperiidae), H. A. Freeman
Field and Laboratory
No abstract provided.
Description Of Two New Birds From Western Texas, Thomas D. Burleigh, George H. Lowery Jr.
Description Of Two New Birds From Western Texas, Thomas D. Burleigh, George H. Lowery Jr.
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
A New Kangaroo Rat Of The Dipodomys Ordii Group From The Big Bend Region Of Texas, Monroe D. Bryant
A New Kangaroo Rat Of The Dipodomys Ordii Group From The Big Bend Region Of Texas, Monroe D. Bryant
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
Geographic Races Of The Kangaroo Rat, Dipodomys Microps, E. Raymond Hall, Frederick H. Dale
Geographic Races Of The Kangaroo Rat, Dipodomys Microps, E. Raymond Hall, Frederick H. Dale
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
Oil Provinces Of Colombia And Venezuela, William R. Ransone
Oil Provinces Of Colombia And Venezuela, William R. Ransone
Field and Laboratory
Colombia and Venezuela are by far the most important oil producing countries of South America. In 1938, Venezuela ranked third among the oil producing countries of the world, with a yield of 190,000,000 barrels. Only the United States (1,265,000,000 barrels), and Russia (210,000,000 barrels) outrank that country. Colombia, with 22,000,000 barrels was ninth among the petroleum producing countries of the world.
Drainage Controls In The Austin Chalk Cuesta Area Of Dallas, Texas, E. F. Blakemore Jr.
Drainage Controls In The Austin Chalk Cuesta Area Of Dallas, Texas, E. F. Blakemore Jr.
Field and Laboratory
The Austin chalk cuesta is a prominent topographic feature which trends northeast across central Texas from Austin through Waco and Dallas. The escarpment is formed through differential erosion of beds at the contact between the Austin chalk and Eagle Ford: shale, the overlying chalk forming the cuesta. The area described in this paper is situated 6 miles west of Dallas, south of the Trinity River Cross Valley.
Bionomics Of The Aquatic And Semi-Aquatic Hemiptera Of Dallas County, Texas, Dick D. Millspaugh
Bionomics Of The Aquatic And Semi-Aquatic Hemiptera Of Dallas County, Texas, Dick D. Millspaugh
Field and Laboratory
Although (as Professor S. W. Geiser has shown in his publications on scientific study and exploration in Early Texas) a number of naturalists and entomological collectors have worked in Texas, and some of them (like Jacob Boll, Gideon Lincecum, J. D. Mitchell, A. C. V. Schott, G. W. Belfrage, E. A. Schwarz and F. A. Schaupp) have made notable contributions toward our first knowledge of the insect fauna of Texas, either by collection of specimens sent to monographers and specialists, or by publication, still, on several groups our information is meager. Among these groups are the aquatic and semi-aquatic Hemiptera.
A List Of Birds Observed On The 1938 Semple Expedition To Northeastern México, George M. Sutton, Thomas D. Burleigh
A List Of Birds Observed On The 1938 Semple Expedition To Northeastern México, George M. Sutton, Thomas D. Burleigh
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
The Importance Of Local Mosquito Surveys In Minnesota, William A. Riley
The Importance Of Local Mosquito Surveys In Minnesota, William A. Riley
Journal of the Minnesota Academy of Science
No abstract provided.
A Peripheral Vascular System As Seen By Means Of A Clark Window In The Ear Of The Rabbit, T. H. Seldon, R. H. Barrett, H. E. Essex
A Peripheral Vascular System As Seen By Means Of A Clark Window In The Ear Of The Rabbit, T. H. Seldon, R. H. Barrett, H. E. Essex
Journal of the Minnesota Academy of Science
No abstract provided.
A Human Hereditary Trait Appearing In Offspring From A Cousin-Marriage, C. P. Oliver
A Human Hereditary Trait Appearing In Offspring From A Cousin-Marriage, C. P. Oliver
Journal of the Minnesota Academy of Science
No abstract provided.
Star-Recessive, A Spontaneous Mutation In Drosophila Melanogaster, Edward B. Lewis
Star-Recessive, A Spontaneous Mutation In Drosophila Melanogaster, Edward B. Lewis
Journal of the Minnesota Academy of Science
No abstract provided.
A Key To Snakes Of Minnesota, Milton D. Thompson
A Key To Snakes Of Minnesota, Milton D. Thompson
Journal of the Minnesota Academy of Science
No abstract provided.
Adrenaline, Insulin, Potassium, And Phosphorus In Carbohydrate Metabolism, J. Clifford Stickney
Adrenaline, Insulin, Potassium, And Phosphorus In Carbohydrate Metabolism, J. Clifford Stickney
Journal of the Minnesota Academy of Science
No abstract provided.
A Contribution To The Knowledge Of The Minnesota Flora, John W. Moore
A Contribution To The Knowledge Of The Minnesota Flora, John W. Moore
Journal of the Minnesota Academy of Science
No abstract provided.
Growth Substances And Nutrition Of Protozoa, Alfred M. Elliott
Growth Substances And Nutrition Of Protozoa, Alfred M. Elliott
Journal of the Minnesota Academy of Science
No abstract provided.
Light And Pituitary Activity In The Bird, Adolph R. Ringoen
Light And Pituitary Activity In The Bird, Adolph R. Ringoen
Journal of the Minnesota Academy of Science
No abstract provided.
The Role Of Forest Fires In The Reproduction Of Black Spruce, R. K. Lebarron
The Role Of Forest Fires In The Reproduction Of Black Spruce, R. K. Lebarron
Journal of the Minnesota Academy of Science
No abstract provided.
The Cellular Changes Induced In The Testes Of The Albino Rat By Artificial Cryptorchidism And X-Radiation, Arthur J. Gatz
The Cellular Changes Induced In The Testes Of The Albino Rat By Artificial Cryptorchidism And X-Radiation, Arthur J. Gatz
Journal of the Minnesota Academy of Science
No abstract provided.
The Growth Rate Of Wall-Eyed Pike (Stizostedion Vitreum (Mitchill) In Various Lakes Of Minnesota, Samuel Eddy, Kenneth Carlander
The Growth Rate Of Wall-Eyed Pike (Stizostedion Vitreum (Mitchill) In Various Lakes Of Minnesota, Samuel Eddy, Kenneth Carlander
Journal of the Minnesota Academy of Science
No abstract provided.
Incidence Of Infection Of Fish With Clinostomum Marginatum In Northern Minnesota, Walter C. Schuling
Incidence Of Infection Of Fish With Clinostomum Marginatum In Northern Minnesota, Walter C. Schuling
Journal of the Minnesota Academy of Science
No abstract provided.
A New Peromyscus From Texas, William B. Davis
A New Peromyscus From Texas, William B. Davis
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
The Meteorite:A Lecture To Students Of Elementary Geology, John D. Boon
The Meteorite:A Lecture To Students Of Elementary Geology, John D. Boon
Field and Laboratory
I have at hand a chunk of iron that was found on the rim of Meteor Crater in Arizona. Whence came this mass of metal that is unlike terrestrial rocks, and what is the story it tells?
Origin Of The Menard "Crater", Emmett Blakemore
Origin Of The Menard "Crater", Emmett Blakemore
Field and Laboratory
On August 30, 1938, the foreman of the Wilkerson Ranch twelve miles southwest of Menard, Texas, reported that a meteorite fell on the ranch and created a large crater. The story, widely publicized by newspapers, caused the writer, accompanied by Professor J. D. Boon of Southern Methodist University, to investigate this phenomenon.
The Hesperiidae Of Dallas County, Texas, Avery Freeman
The Hesperiidae Of Dallas County, Texas, Avery Freeman
Field and Laboratory
Little is known concerning the Hesperiidae of the Southwest. In Texas, various early naturalists made extensive collections of insects, but none specialized on Lepidoptera.