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Gastric Motility In Vitamin Deficiency, Erma Anita Smith
Gastric Motility In Vitamin Deficiency, Erma Anita Smith
Proceedings of the Iowa Academy of Science
Guinea pigs in vitamin C deficiency and dogs in vitamin B deficiency were studied.
Proceedings Of The Forty-First Annual Meeting Of The Iowa Academy Of Science, Held At Iowa City, May 6 And 7, 1927: Minutes Of The Meeting; Staff & Committee Reports
Proceedings of the Iowa Academy of Science
No abstract provided.
The Physiographic Ecology Of A Wisconsin Drift Lake, Lois A. Catlin, Ada Hayden
The Physiographic Ecology Of A Wisconsin Drift Lake, Lois A. Catlin, Ada Hayden
Proceedings of the Iowa Academy of Science
In Iowa, practically all of the swamp land and many of the smaller lakes with which the early pioneers were familiar have been drained and there agricultural crops are grown. Whether the greatest economic benefit may be derived from appropriating for agricultural purposes such a small proportion of the land as lake beds represent, or by conserving and developing their natural resources is a subject for consideration. With one exception (that of Wall Lake in Wright County), Little Wall Lake is the only lake of any size within an area with radius of at least fifty miles, and in view …
The Organs Of The Parietal Fossa In Elasmobranchs, R. E. Smiley, W. R. Ingram, E. Blagg
The Organs Of The Parietal Fossa In Elasmobranchs, R. E. Smiley, W. R. Ingram, E. Blagg
Proceedings of the Iowa Academy of Science
Davidson, in a paper on the musculature of Heptanchus maculatus (1918), mentions a small shield-shaped organ to be found in the parietal fossa, and in connection with it a pair of small muscles having their origin on the cranium and dorsal longitudinal muscles. He believes that these muscles constrict this sac-like organ.
The Swimbladder As A Respiratory Organ In Lepidosteus, George E. Potter
The Swimbladder As A Respiratory Organ In Lepidosteus, George E. Potter
Proceedings of the Iowa Academy of Science
In the past there have been many papers presented which have given evidence pointing to a probable origin of air-breathing vertebrates from certain physostomous fishes. The animals to which these papers have referred, apparently have some organ capable of supplementing respiration in times of need. Several of the Dipnoi and Ganoids have been credited with this adaptation and therefore have been responsible for the transition of a large number of vertebrates from water to land. Such a change gives rise to the need for organs capable of respiring atmospheric air.
Fortieth Annual Meeting Of The Iowa Academy Of Science, April 30 And May 1, 1926, Iowa Academy Of Science
Fortieth Annual Meeting Of The Iowa Academy Of Science, April 30 And May 1, 1926, Iowa Academy Of Science
Iowa Academy of Science Documents
No abstract provided.
What Names Should Be Used For The Organisms Producing Nodules On The Roots Of Leguminous Plants?, R. E. Buchanan
What Names Should Be Used For The Organisms Producing Nodules On The Roots Of Leguminous Plants?, R. E. Buchanan
Proceedings of the Iowa Academy of Science
Strangely enough, there is even yet no agreement among those who are working with the organisms causing nodules upon the roots of leguminous plants as to the name or names to be applied to them. In consequence there is more or less confusion in the literature. At the last meeting of the Society of American Bacteriologists (Madison, Wisconsin) attention was called to the fact that in a recent issue of Soil Science three different names were applied to the same organism: viz. Bacillus radicicola, Rhizobium leguminosarum and Rhizobium radicicolum. It was urged that some agreement be reached.
The Status Of The Psychogalvanic Reflex In Psychology, Nancy Bayley
The Status Of The Psychogalvanic Reflex In Psychology, Nancy Bayley
Proceedings of the Iowa Academy of Science
Experimental studies of the emotions are comparatively recent undertakings. Most investigations have been done by means of the "method of expression," on the basis of a physical measurement of characteristic physiological changes, as breathing or pulse. One of the more promising of these measurements is that of the so-called psychogalvanic reflex. This reflex is a change of electrical conduction through the body which can be measured by means of a galvanometer. It occurs under emotional conditions and when an emotion is reported by the subject. This phenomenon was first reported by Feré in 1888 when he found the reflex corresponding …
Winter Birds Records, 1922 To 1926, In Northwestern Iowa, Chas. J. Spiker
Winter Birds Records, 1922 To 1926, In Northwestern Iowa, Chas. J. Spiker
Proceedings of the Iowa Academy of Science
It is the purpose of this paper to connect with a series of papers on winter birds in Northwestern Iowa, started in 1917 by Dr. T. C. Stephens of Morningside College. The observations herein noted were made by the writer during the four winters of his attendance at Morningside College, Sioux City. The records in the main are for Woodbury County; any data obtained outside of Woodbury County are specified when they appear in the paper.
Notes Of Oxygen Consumption In Turtles Chrysmus Marginata Belli And Chelydra Serpentina Linn, Francis Marsh Baldwin
Notes Of Oxygen Consumption In Turtles Chrysmus Marginata Belli And Chelydra Serpentina Linn, Francis Marsh Baldwin
Proceedings of the Iowa Academy of Science
In an earlier paper read before the Academy, data were given on the comparative ratio of oxygen consumption in certain fishes and other marine forms. These figures were obtained by analysis of samples of water in which the animals had been kept, using the chemical method devised by Winkler. As is customary in such work, the figures of consumption were reduced to the volumetric basis at uniform pressure and temperature and were expressed in cubic centimeters per gram of body weight per hour. There resulted from these studies an interesting comparison in metabolic rate in the different fishes, being greatest …
The Address Of The President - The Ministry Of Science, R. I. Cratty
The Address Of The President - The Ministry Of Science, R. I. Cratty
Proceedings of the Iowa Academy of Science
We are living in a very progressive age - one which when compared with that of our forebears, is filled with advantages for our welfare and enjoyment that challenges the attention of every thoughtful person. That knowledge is power was never a more self-evident truth than it is today, and science, which is simply classified knowledge, is every day coming more closely in touch with human lives, and ministers to us in innumerable ways undreamed of a century ago. Just how great our debt is for all this it is difficult to say. Captain Roald Amundson, that modern Viking whom …
The Present Tendencies In The Bacteriological Examination Of Water, Jack J. Hinman, Jr.
The Present Tendencies In The Bacteriological Examination Of Water, Jack J. Hinman, Jr.
Proceedings of the Iowa Academy of Science
No abstract provided.
The Bone Deposit At Cherokee, E. J. Cable
The Bone Deposit At Cherokee, E. J. Cable
Proceedings of the Iowa Academy of Science
Last fall while the writer was classifying material for the Cherokee high school museum, Mr. N. Stiles, one of the leading citizens of the town who is interested in geology and history, and who has made an excellent collection of Indian, geological and historical material for the high school museum, suggested to the writer that he thought he knew where there might be a deposit of fossil bones. The writer became interested immediately and accompanied Mr. Stiles to the place in question. After a careful examination it was found that the bones represent a rich deposit of mammalian remains.
Some Recent Finds Of Remains Of The Extinct Ground Sloth In Southwest Iowa, Fred Delavan
Some Recent Finds Of Remains Of The Extinct Ground Sloth In Southwest Iowa, Fred Delavan
Proceedings of the Iowa Academy of Science
Evidence of the extinct ground sloth in Iowa is very meager, but additional remains are being brought forth yearly. At the present time the knowledge of its presence is limited almost entirely to the counties bordering the Missouri River; the one exception is Dubuque County, in the middle-eastern portion of the state. Three specimens have been added to the collection in the past year. A tooth of the Megalonyx from Dixon Creek, Fremont County, collected by George Day, and a tooth and claw bone from Chabaneau Creek, Mills County, collected by the writer. The tooth from Chabaneau is exceptionally long …
A Horntail Trilobite From Mcgregor, Iowa, A. O. Thomas
A Horntail Trilobite From Mcgregor, Iowa, A. O. Thomas
Proceedings of the Iowa Academy of Science
Recently an excellent specimen of the horntail trilobite was collected at McGregor by Miss Florence S. Chapin a member of the geology field class of the McGregor Wild Life School. This fossil is so rarely found in other than fragmentary condition in Iowa that any well-preserved specimen deserves to be recorded and illustrated. The specimen presents the dorsal shield, is unrolled, and retains the head, thorax and pygidiurn or tail shield. The right margin of the head, the right free cheek and the tips of the tail spines are missing. When found only a part of the axial lobe and …
The Occurrence Of The Brachiopod Bilobites Bilobus In The Silurian Of Iowa, A. O. Thomas
The Occurrence Of The Brachiopod Bilobites Bilobus In The Silurian Of Iowa, A. O. Thomas
Proceedings of the Iowa Academy of Science
The small brachiopod, Bilobites bilobus, was first described by Linnaeus in the 12th edition of his Systema Naturae in 1767. Though frequently reported since then from several Silurian horizons in both Europe and America this is the first occurrence in the Silurian of Iowa.
Proboscidian Remains From Red Oak And Ottumwa, Iowa, A. O. Thomas
Proboscidian Remains From Red Oak And Ottumwa, Iowa, A. O. Thomas
Proceedings of the Iowa Academy of Science
During the past year several very interesting proboscidian bones have been found in the Pleistocene deposits of Iowa. The first of these is the skull of a mastodon unearthed at some depth in an excavation near Red Oak. The mandible and tusks are lacking and the brain case has been broken away posteriorly. The face is well preserved and shows clearly the sutures, the various foramina, the anterior nares, the high forehead, and the great alveoli for the massive tusks. A well preserved molar is in place in each half jaw. The damaged condition posteriorly reveals unusually well the cancellated …
Relativistic Reflections, Edward S. Allen
Relativistic Reflections, Edward S. Allen
Proceedings of the Iowa Academy of Science
An important result of the great interest in the theory of relativity has been that mathematicians and physicists on the one hand, philosophers on the other, have given increasing attention to each other's work. It may not, then, be out of place for one whose interest in the subject has been mainly on the mathematical side to examine some philosophical inferences which have been drawn from it.
Report On The Food Habits Of Citellus Tridecemlineatus Tridecemlineatus (Mitchill), F. L. Fitzpatrick
Report On The Food Habits Of Citellus Tridecemlineatus Tridecemlineatus (Mitchill), F. L. Fitzpatrick
Proceedings of the Iowa Academy of Science
The study of the food habits of Citellus t. tridecemlineatus was carried out in 1922 and 1923 as a part of a comprehensive ecological survey of this species. In so far as the study of food habits was concerned, the principal method of procedure was to collect the stomachs and identify their contents. To make the work as complete as possible specimens were collected in widely separated parts of the state, (Iowa), and at different times of the year.
Origin Of Species Eucrangonyx Mucronatus, L. S. Ross
Origin Of Species Eucrangonyx Mucronatus, L. S. Ross
Proceedings of the Iowa Academy of Science
The relation of the blind species of any order of animal life to those having developed eyes is an interesting problem and one that is not yet fully solved. Many observations have been made by various naturalists, the greater number of whom believe that a process of evolution has been effected by the absence of light acting upon forms originally with normally developed eyes. Semper, in his "Animal Life as Affected by the Natural Conditions of Existence," questions the influence of the absence of light in effecting the atrophy of visual organs. Some of his objections are fully answered by …
Some Observations On The Habits Of Leeches, Catharine Mullin
Some Observations On The Habits Of Leeches, Catharine Mullin
Proceedings of the Iowa Academy of Science
There are two types of leeches, those having three jaws and those having only a proboscis. The former, long worm-like animals, are free-swimming. When at rest they are found along the borders of bodies of water concealing themselves beneath stones or in the mud. The medicinal leech, Hirudo medicinalis, belongs to this group. Most of the latter are flat leaf-like creatures that live attached to the underside of stones, leaves, plants, or to their hosts. By means of suckers they move about after the fashion of "measuring worms."
The Coral Reefs Of Fiji, C. C. Nutting
The Coral Reefs Of Fiji, C. C. Nutting
Proceedings of the Iowa Academy of Science
This is a brief account of the experiences of a zoologist on the reefs of Makuluva, Fiji. The quarters of the party of naturalists from the State University are described, something of daily life touched upon, and the experiences connected with reef collecting are given. Some of the more interesting animal inhabitants of the reefs are described and illustrated.
Proceedings Of The Thirty-Ninth Annual Meeting Of The Iowa Academy Of Science, Held At Cedar Falls, May 1-2, 1925: Minutes Of The Meeting; Staff & Committee Reports
Proceedings of the Iowa Academy of Science
No abstract provided.
Some Additional Observations On Sphenodon Punctatum In Captivity, Warren N. Keck
Some Additional Observations On Sphenodon Punctatum In Captivity, Warren N. Keck
Proceedings of the Iowa Academy of Science
In the Proceedings of the Iowa Academy of Science, Vol. XXX, 1925, pp. 151-115, appeared an article by Wendell Krull on certain habits of Sphenodon punctatum which be observed about this animal in captivity. Since September, 1924, the writer has been caring for two of the same specimens upon which Mr. Krull made his observations. The reptiles have been kept under exactly the same conditions as those under which Mr. Krull made his observations so that any changes in habits are not due to changes of conditions. While most of my observations and notes coincide very well with Mr. Krull's, …
Certain Body Temperature Changes In The Snapping And Painted Turtles, F. M. Baldwin
Certain Body Temperature Changes In The Snapping And Painted Turtles, F. M. Baldwin
Proceedings of the Iowa Academy of Science
Experiments performed at Iowa Lakeside Laboratory during the past summer indicate that both forms show fluctuations of from 3 to 6 degrees F. in the so-called non-critical ranges of their environment (50-80 degrees F.). When subjected to a rapid environmental drop the rectal readings show a somewhat greater lag than when cooled more slowly. In both procedures a check in drop is noted at about 40 degrees F. (4.5 degrees C.) and there is maintained for a considerable interval of time.
The Protein Requirements Of Practically Mature Fattening Cattle, C. C. Culbertson, John M. Evvard
The Protein Requirements Of Practically Mature Fattening Cattle, C. C. Culbertson, John M. Evvard
Proceedings of the Iowa Academy of Science
A number of tests have been carried on at the Iowa Agricultural Experiment Station with fattening two-year-old steers. These steers have been fed during the fall and winter months in dry lot, usually for 120 days.
The Occurrence Of Hickories In Iowa In Relation To Soil Types, Fred B. Trenk
The Occurrence Of Hickories In Iowa In Relation To Soil Types, Fred B. Trenk
Proceedings of the Iowa Academy of Science
The data of ecology reveals a very close relationship between soil types and the species of plant which will be normally found on them. Silviculturists have lately applied methods of ecology quite intensively to a study of the habits and associations of trees, and in these studies the physical and chemical properties of soils occupy a position of prominence. Silviculturists recognize some ten or twelve ecological factors influencing the occurrence and distribution of sylva. These are quite commonly known to foresters as the "Silvicultural Characteristics of Trees." Among the most important of these factors is the one of soil quality.
Nutritive Value Of Powered Milk Together With Observations For A New Vitamin For Reproduction, L. T. Anderegg, V. E. Nelson
Nutritive Value Of Powered Milk Together With Observations For A New Vitamin For Reproduction, L. T. Anderegg, V. E. Nelson
Proceedings of the Iowa Academy of Science
Feeding experiments with rats revealed that the whole milk powder employed was adequate as a source of protein and vitamins for growth, reproduction, and rearing of young to the fourth generation. On similarly composed diets wherein skimmed milk powder (and butter fat) was employed in place of whole milk powder, there was marked interference with reproduction. Addition of either wheat embryo or yeast enhanced the nutritive value of the diet but did not make it optimum. Particularly, when added cod liver oil served as a source of some of the vitamins, decomposition products were observed when the diet was stored …