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Articles 1263901 - 1263930 of 1264790

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The Open Court. Jan 1890

The Open Court.

The Open Court

No abstract provided.

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The Open Court. Jan 1890

The Open Court.

The Open Court

No abstract provided.

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The Open Court. Jan 1890

The Open Court.

The Open Court

No abstract provided.

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A New Distilling Flask For Use In The Kjeldahl Process, G. E. Patrick, D. B. Bisbee Jan 1890

A New Distilling Flask For Use In The Kjeldahl Process, G. E. Patrick, D. B. Bisbee

Proceedings of the Iowa Academy of Science

The only serious drawback to the Kjeldahl method of nitrogen determination is the breakage of distilling flasks, and in laboratories where many determinations of albuminoid nitrogen are made by the Stutzer process this breakage is often a matter of much annoyance and considerable expense, since only the best quality of flasks will long stand the requirements of the process.

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Front Matter Jan 1890

Front Matter

Journal of the Minnesota Academy of Science

No abstract provided.

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A Pre-Historic Indian Village, F. W. Pettigrew Jan 1890

A Pre-Historic Indian Village, F. W. Pettigrew

Journal of the Minnesota Academy of Science

No abstract provided.

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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.

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Corn Smut, [L. H. Pammel] Jan 1890

Corn Smut, [L. H. Pammel]

Proceedings of the Iowa Academy of Science

It is the generally accepted opinion among botanists that corn smut (Ustilago zeae-mays) enters the tissues of its host during the early stages of corn, shortly after germination. These opinions are based on the careful experiments conducted by Dr. Julius Kuehn, a careful German investigator. Last spring some experiments were started on the College Farm with the view of preventing this troublesome disease. It was expected, of course, that the results at the close of the season would show a decided advantage in the treated corn, but to my surprise the results were entirely negative.

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Catalogue Of The Hemiptera Of Iowa, Herbert Osborn Jan 1890

Catalogue Of The Hemiptera Of Iowa, Herbert Osborn

Proceedings of the Iowa Academy of Science

A first notice of the Hemiptera was presented to the Academy in December, 1887, and a second in 1889. The third installment was presented September, 1890, and comprised sixty-seven species. The previous lists, not having been published, will make the catalogue of much greater value to combine them here. This group of insects is an exceedingly important one, containing many very injurious species. While many of the especially destructive forms have had extended notice, no list of the species occurring in the State has hitherto appeared.

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Exhibition Of Volcanic Dust From Omaha, Nebraska, J. E. Todd Jan 1890

Exhibition Of Volcanic Dust From Omaha, Nebraska, J. E. Todd

Proceedings of the Iowa Academy of Science

This material was from a stratum of whitish aspect, about 18 inches in thickness, found in the bluffs facing the Missouri River about 7½ miles north of Omaha. It has the same general characteristics as the volcanic dust which has been found in quantity along the Republican, in southern Nebraska, also in Knox, Cumming and Seward Counties in the same State. This statement is made on the authority of J. S. Diller of the United States Geological survey, who has examined samples from all these localities microscopically. This differs in being stained with oxide of iron, and the sharp angular …

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The Tertiary Silicified Woods Of Eastern Arkansas, R. Ellsworth Call Jan 1890

The Tertiary Silicified Woods Of Eastern Arkansas, R. Ellsworth Call

Proceedings of the Iowa Academy of Science

The occurrence of silicified wood in the sands and gravels of the Tertiary of the Lower Mississippi Valley has long been known. Aside, however, from the numerous localities mentioned by Hilgard, nearly all of which are in the State of Mississippi, little attention has been given it. Numerous geologists have spoken of it or incidentally studied it in connection with other investigations, but hitherto no attempt has been made to recognize the species and fix their taxonomic value, if, indeed, they possess any such value. Among those who have investigated the Orange Sands and other Tertiary deposits of the Mississippi …

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Membership Of The Academy And Constitution Jan 1890

Membership Of The Academy And Constitution

Proceedings of the Iowa Academy of Science

No abstract provided.

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Striation Of Rocks By River Ice, J. E. Todd Jan 1890

Striation Of Rocks By River Ice, J. E. Todd

Proceedings of the Iowa Academy of Science

Though it is commonly admitted by geologists, that both land-ice and floating ice are capable of striating rocks, when armed with erratics; careful discriminations seem to be largely neglected. The question, whether river-ice was ever the active agent in scratching rocks, had been raised in the writer's mind several years since by a few observations in Dakota. Diligent search at several seemingly favorable localities had given only negative evidence, until this past season, when two or three observations seem to demonstrate the fact that such is not very infrequently the case.

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Preliminary Note On The Sedentary Habits Of Platyceras, Charles R. Keyes Jan 1890

Preliminary Note On The Sedentary Habits Of Platyceras, Charles R. Keyes

Proceedings of the Iowa Academy of Science

Platyceras is a generic term which has been proposed for a Paleozoic group of mollusks whose shells are "sub-oval or sub-globose, with a small spire, the whorls of which are sometimes free and sometimes contiguous; the mouth generally campanulated or expanded." These fossil shells have been frequently referred to the genus of modern mollusca known as Capulus. In the case of Platyceras as in many other Paleozoic genera, numerous species have been based, not on any apparent distinctive character, but seemingly simply on their occurrence at different geological horizons; and this has given rise to the establishment of many species …

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The Fishes Of The Des Moines Basin, R. Ellsworth Call Jan 1890

The Fishes Of The Des Moines Basin, R. Ellsworth Call

Proceedings of the Iowa Academy of Science

To one familiar with so much of the literature of science as pertains to the natural history of the State of Iowa it is surprising that so little has been done in relation to its fishes. A list designed to stand for the icthyic fauna of the State has yet to be compiled. There have appeared but three papers devoted to Iowa fishes. Of these three one was published under the auspices of the United States National Museum, the others were both published in Iowa, under Iowa auspices and by an Iowa man. The first of these papers lists thirty …

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A New Conocardium From The Iowa Devonian, Charles R. Keyes Jan 1890

A New Conocardium From The Iowa Devonian, Charles R. Keyes

Proceedings of the Iowa Academy of Science

Shell of medium size, subtrigonal, anterior view broadly cordate. Anterior end truncate, with a forward slope from the umbones to the lower anterior sharply rounded extremity. Dorsal margin behind the beaks slightly curved, with the edges of the valves incurved while in front of the beaks it is produced forward into a more or less prominent alate extension; basal margin crenate within; posterior extremity at the hinge line decidedly angular. Beaks rather prominent, gibbous, incurved. Hiatus lanceolate; occupying about two-thirds of the lower posterior margin. Surface marked by simple, regular, radiating costae, about forty in number, twenty-five of which occupy …

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Some Of The Causes And Results Of Polygamy Among The Pinnipedia, C. C. Nutting Jan 1890

Some Of The Causes And Results Of Polygamy Among The Pinnipedia, C. C. Nutting

Proceedings of the Iowa Academy of Science

Several years ago the writer was much struck by the great sexual differences met with among the Gallinae, and had noted the fact that there was a relation between sexual disparity in size and polygamy.

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Egg-Laying Of The Apple Curculio (Anthonomus Quadrigibus Say), C. P. Gillette Jan 1890

Egg-Laying Of The Apple Curculio (Anthonomus Quadrigibus Say), C. P. Gillette

Proceedings of the Iowa Academy of Science

I am not aware that anyone has published actual observations on the method of oviposition by this insect. On the 13th of June, 1889, I was fortunate enough to see a female perform the entire operation which was as follows: First a cavity was eaten in the apple as deep as the beak was long, the bottom being much enlarged and sub-triangular in outline. The walls of the cavity converged to the opening which was only large enough to admit the slender beak.

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Contribution To The Fauna Of The Lower Coal Measures Of Central Iowa, Charles R. Keyes Jan 1890

Contribution To The Fauna Of The Lower Coal Measures Of Central Iowa, Charles R. Keyes

Proceedings of the Iowa Academy of Science

Among a large number of species recently discovered in the lower coal measures near Des Moines are some hitherto unrecognized forms. The following are the descriptions of three of the most important shells.

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Notes On The Redrock Sandstone, Charles R. Keyes Jan 1890

Notes On The Redrock Sandstone, Charles R. Keyes

Proceedings of the Iowa Academy of Science

The sandstone of Redrock, in Marion County, Iowa, has long attracted popular attention. The bright vermillion cliffs rise to a height of one hundred to one hundred and fifty feet above the water surface of the Des Moines River. The red coloration of the rock, however, is (?). The formation has a known geographic extent of at least twenty miles; and probably stretches out much farther. At Redrock Cliff the stone is massive for the most part, but rather soft and thin-bedded above. At this place it is a very fine grained and homogeneous sand rock, some portions even affording …

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Brick And Other Clays Of Des Moines, Charles R. Keyes Jan 1890

Brick And Other Clays Of Des Moines, Charles R. Keyes

Proceedings of the Iowa Academy of Science

In the absence of extensive exposures of good building stone, in the immediate vicinity of many of the larger cities of the State, architectural materials must be derived in large part always from other sources. Fortunately in and about these towns there are exhaustless supplies of good clays from which may be manufactured easily the ordinary structural and ornamental materials. These clays, however, as is well known, have diverse properties, certain ones being better adapted for particular purposes than others, while some may be used more advantageously in different ways. Hence the indiscriminate working of the deposits is not attended …

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Notes On Missouri Minerals, Erasmus Haworth Jan 1890

Notes On Missouri Minerals, Erasmus Haworth

Proceedings of the Iowa Academy of Science

At various places in the Archaean areas of Missouri the granites and porphyries are cut by dikes of basic rocks which usually trend N. E. and: S. W. but occasionally in other directions. The dike rocks are comparatively constant in composition. When holo-crystalline they are a diabase, or an olivine diabase, and when less perfectly crystallized they generally correspond to diabase porphyrite.

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Aluminum In Iowa, Charles R. Keyes Jan 1890

Aluminum In Iowa, Charles R. Keyes

Proceedings of the Iowa Academy of Science

Attention is called to the birth of an industry in Iowa that promises to be one of the greatest industries of the State in the near future. It is the establishment of a plant for the production of aluminum. As is well known, this metal is soon to be the metal of the world-replacing largely iron, steel and other metallic substances used in the arts. The properties of aluminum need not be dwelt upon here. The cost of producing the metal has hitherto been the great drawback to its general usage. A few years ago the price was $15.00 or …

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Phaenological Notes, L. H. Pammel Jan 1890

Phaenological Notes, L. H. Pammel

Proceedings of the Iowa Academy of Science

Among the many interesting observations in connection with our flora is the relation that plants have to climatology. It is true the question is an agricultural and horticultural one only so far as it bears on questions of our cultivated plants. But with the addition of new plants every year to our list of those cultivated for utilitarian or ornamental purposes, it is important to record exact data in regard to their behavior under cultivation. But in plant climatology all plants should be studied with reference to various climatic conditions.

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Artesian Wells In Iowa, R. Ellsworth Call Jan 1890

Artesian Wells In Iowa, R. Ellsworth Call

Proceedings of the Iowa Academy of Science

The demand for artesian waters in the State of Iowa is not to be connected with unfavorable climatal conditions. The State is well watered; a considerable number of rather large streams and numerable smaller ones combine to make it, from a hydrographic standpoint, unique among prairie states. The annual rainfall is a little more than thirty-five inches and chiefly comes at a time of year when every crop necessity is fully supplied. The main grounds upon which artesian waters are sought, therefore, are first, the convenience of such flows for farm and urban use, and second, the supposed purity of …

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Observations From The Deck Of A Steamer, L. Otlry Pindar Jan 1890

Observations From The Deck Of A Steamer, L. Otlry Pindar

Wilson Bulletin

No abstract provided.

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How The Cooper's Hawk Hunts His Prey, H. H. Brimley Jan 1890

How The Cooper's Hawk Hunts His Prey, H. H. Brimley

Wilson Bulletin

No abstract provided.

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Among The Gulls At Duck Island, Cilas S. Butters Jan 1890

Among The Gulls At Duck Island, Cilas S. Butters

Wilson Bulletin

No abstract provided.

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Massachusetts Assembly, Wilson Bulletin Jan 1890

Massachusetts Assembly, Wilson Bulletin

Wilson Bulletin

No abstract provided.

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The Open Court. Jan 1890

The Open Court.

The Open Court

No abstract provided.

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