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Articles 53821 - 53850 of 53893

Full-Text Articles in Life Sciences

Aerial Reconnaissance Mapping Of Land Utilization, Claude C. Albritton Jr. Apr 1933

Aerial Reconnaissance Mapping Of Land Utilization, Claude C. Albritton Jr.

Field and Laboratory

Within the last year, the Department of Geology and Geography of Southern Methodist University has initiated a series of land utilization studies for Dallas County. The survey divides the county into thirty areas of approximately thirty square miles each. The first two areas assigned, located in the northwest corner of the county, embracing about sixty-five square miles, contain two small urban centers, Farmers Branch (population 400), and Carrollton (population 689). In the course of field work on the assigned areas, the authors felt that an aerial reconnaissance might expedite the survey and an airplane trip was arranged to cover the …


Notes, Corrections, Alumnae Notes Apr 1933

Notes, Corrections, Alumnae Notes

Field and Laboratory

No abstract provided.


Multiple Internal Reflection In A Prism, Fitzhugh Marshall Jr. Nov 1932

Multiple Internal Reflection In A Prism, Fitzhugh Marshall Jr.

Field and Laboratory

In using the spectrometer for determining the index of refraction of a prism by the well-known method of minimum deviation, frequently a line is observed which does not follow the motion of the spectrum as a whole.


Equipping A Vitamin Laboratory On Depression Funds, May L. Whitsitt Nov 1932

Equipping A Vitamin Laboratory On Depression Funds, May L. Whitsitt

Field and Laboratory

The spending of a sum of money for research purposes in days of decreased and declining income takes on the air of a real adventure. When given the opportunity of undertaking a research problem in the field of vitamin investigation the writer eagerly set out to see how far funds could be extended.


Lingual Deposition In The Woodbine Sands Along Copperas Branch, Denton County, Texas: A Study In Marine Sedimentation, Ellis W. Shuler Nov 1932

Lingual Deposition In The Woodbine Sands Along Copperas Branch, Denton County, Texas: A Study In Marine Sedimentation, Ellis W. Shuler

Field and Laboratory

The lack of outcrops in three dimensions often limits the interpretation and understanding of sedimentary structures, the relation of transition beds, and the cycle of sedimentation. The low dips of the Woodbine sands in Denton County, Texas, together with the numerous outcrops in the miniature canyons of Hickory Creek, Bethel and Copperas Branches, offer an unusual opportunity for studies in the sedimentation of these sands.


A Planetarium, John D. Boon Nov 1932

A Planetarium, John D. Boon

Field and Laboratory

Few people, even among college graduates, have a clear conception of the structure of the Solar System. Perhaps there are two reasons why this is true. In the first place, our educational system is so organized that there is little room for courses in astronomy, either in the high school or college curriculum. In the second place, it is not easy to get the true conception of the Solar System without a mechanical model, and mechanical models of the sun and its family are difficult to construct. In order that the students of Southern Methodist University might obtain a more …


The Frequency Of Occurrence Of Albinism In Terrestrial Isopods, S. W. Geiser Nov 1932

The Frequency Of Occurrence Of Albinism In Terrestrial Isopods, S. W. Geiser

Field and Laboratory

The well-known British geneticist, Professor F. A. E. Crew, of the University of Edinburgh, in a plate illustrating his article, "Albino," in the fourteenth edition of the Encyclopaedia Britannica, gives an excellent figure showing albinism in the common European lobster, Homar1lS gammarus (L.). This unusual figure and record, as one of the few reported cases of albinism among the Crustacea, deserves more than passing comment.


A Note On The Calculus Of The Distribution Of Genetic Characters In Crosses Involving Linkage, S. W. Geiser Nov 1932

A Note On The Calculus Of The Distribution Of Genetic Characters In Crosses Involving Linkage, S. W. Geiser

Field and Laboratory

Teachers of genetics will welcome a simplified method for the calculation of the segregation of characters in crosses involving linkage, over the old, laborious method now in use.


The Natural Vegetation Of The Lower Rio Grande Valley Of Texas, Edwin J. Foscue Nov 1932

The Natural Vegetation Of The Lower Rio Grande Valley Of Texas, Edwin J. Foscue

Field and Laboratory

The Lower Rio Grande Valley, as considered in this paper, occupies the American side of the Rio Grande delta in the extreme southern part of Texas, between latitudes 25 degrees 50 minutes and 26 degrees 50 minutes. The area lies within three degrees of the Tropic of Cancer. The Lower Rio Grande Valley, as considered in this paper, occupies the American side of the Rio Grande delta in the extreme southern part of Texas, between latitudes 25 degrees 50 minutes and 26 degrees 50 minutes. The area lies within three degrees of the Tropic of Cancer. Although favored with a …


Field And Laboratory, Notes Nov 1932

Field And Laboratory, Notes

Field and Laboratory

With the belief that the discipline of writing and the possibility for publication will promote a spirit of research, Field and Laboratory begins with this issue as a semi­annual magazine devoted to the publication of the results of work done by students and teachers of science in Southern Methodist University. The articles in this issue include the records of experiments conducted in the Physics, Biology, and Chemistry laboratories, and of field studies in Geology and Geography. As the magazine is sponsored by the entire science group, articles will of necessity be varied in character; it is planned to include in …


Front Matter May 1917

Front Matter

Journal of the Minnesota Academy of Science

The last address of the late Newton Horace Winchell. Originally presented before the Iowa Academy of Sciences, at Cedar Falls, Iowa, April 24, 1914.


The Antiquity Of Man In America Compared With Europe, Newton Horace Winchell May 1917

The Antiquity Of Man In America Compared With Europe, Newton Horace Winchell

Journal of the Minnesota Academy of Science

Last Lecture of Prof. N. H. Winchell, at Cedar Falls, Iowa, April 24, 1914, a week before his death; read also from this revised copy (by Warren Upham) at the monthly meeting of the Minnesota Academy of Science. February, 1916.


Remarks By Dr. Wm. E. Leonard, Wm. E. Leonard Jul 1914

Remarks By Dr. Wm. E. Leonard, Wm. E. Leonard

Journal of the Minnesota Academy of Science

No abstract provided.


Newton Horace Winchell, 1839-1914, Warren Upham Jul 1914

Newton Horace Winchell, 1839-1914, Warren Upham

Journal of the Minnesota Academy of Science

No abstract provided.


Tributes From Early Associates Jul 1914

Tributes From Early Associates

Journal of the Minnesota Academy of Science

No abstract provided.


Words Of Appreciation, O. W. Oestlund Jul 1914

Words Of Appreciation, O. W. Oestlund

Journal of the Minnesota Academy of Science

No abstract provided.


The Wild Botanic Garden In Glenwood Park, Minneapolis, Eloise Butler Jan 1911

The Wild Botanic Garden In Glenwood Park, Minneapolis, Eloise Butler

Journal of the Minnesota Academy of Science

No abstract provided.


The Prairie Legumes Of Western Minnesota, Lycurgus R. Moyer Jan 1910

The Prairie Legumes Of Western Minnesota, Lycurgus R. Moyer

Journal of the Minnesota Academy of Science

No abstract provided.


The Prairie Flora Of Southwestern Minnesota, L. R. Moyer Jan 1910

The Prairie Flora Of Southwestern Minnesota, L. R. Moyer

Journal of the Minnesota Academy of Science

No abstract provided.


The Evening Grosbeak In Minnesota, Thomas S. Roberts Jan 1910

The Evening Grosbeak In Minnesota, Thomas S. Roberts

Journal of the Minnesota Academy of Science

No abstract provided.


Conservation Of The Future Lumber Supply, T. B. Walker Jan 1910

Conservation Of The Future Lumber Supply, T. B. Walker

Journal of the Minnesota Academy of Science

No abstract provided.


An Orang Hunt In Borneo, Frank S. Bourns Jan 1894

An Orang Hunt In Borneo, Frank S. Bourns

Journal of the Minnesota Academy of Science

No abstract provided.


The Rodentia In Evolution: A Preliminary Study, H. L. Osborn Jan 1892

The Rodentia In Evolution: A Preliminary Study, H. L. Osborn

Journal of the Minnesota Academy of Science

No abstract provided.


Notes On The Minnesota Species Of Laciniaria, E. P. Sheldon Jan 1892

Notes On The Minnesota Species Of Laciniaria, E. P. Sheldon

Journal of the Minnesota Academy of Science

No abstract provided.


Notes On The Alpine Characteristics Of The Minnesota Crest Flora Of Coteau Des Prairies, E. P. Sheldon Jan 1892

Notes On The Alpine Characteristics Of The Minnesota Crest Flora Of Coteau Des Prairies, E. P. Sheldon

Journal of the Minnesota Academy of Science

No abstract provided.


The Rum River Valley As A Botanical District, E. P. Sheldon Jan 1892

The Rum River Valley As A Botanical District, E. P. Sheldon

Journal of the Minnesota Academy of Science

No abstract provided.


Preliminary Notes On The Epinasty And Hyponasty Of Raphainus Cotyledons, E. P. Sheldon Jan 1891

Preliminary Notes On The Epinasty And Hyponasty Of Raphainus Cotyledons, E. P. Sheldon

Journal of the Minnesota Academy of Science

No abstract provided.


The Growth Periodicity Of The Potato Tuber, Conway Macmillan Jan 1891

The Growth Periodicity Of The Potato Tuber, Conway Macmillan

Journal of the Minnesota Academy of Science

No abstract provided.


Front Matter Jan 1890

Front Matter

Journal of the Minnesota Academy of Science

No abstract provided.


The Range And Distribution Of The Lower Silurian Fauna Of Minnesota With Descriptions Of Some New Species, F. W. Sardeson Jan 1890

The Range And Distribution Of The Lower Silurian Fauna Of Minnesota With Descriptions Of Some New Species, F. W. Sardeson

Journal of the Minnesota Academy of Science

No abstract provided.