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A Preliminary Survey Of May Beetles In Iowa, H. E. Jaques

Proceedings of the Iowa Academy of Science

Few insects within our state are of greater economic importance than are the May beetles which in their larval stage as white grubs are serious pests to many growing crops. A normal loss is sustained from them throughout the state each year. The life cycle of at least the most destructive species seems to cover a period of three years and since one brood greatly exceeds the other two in abundance the years of 1921 and 1924 were times when the farmers paid heavy toll to these enemies of grasses, cereals and cultivated crops. This "Brood A" which was responsible …

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

In Memoriam: Philip Sprong; Walter Scott Hendrixson; Clyde Leslie Winter

Proceedings of the Iowa Academy of Science

No abstract provided.

Vascular Structure Of The Kidney In The Snapping And Painted Turtles, Willis De Ryke

Proceedings of the Iowa Academy of Science

This paper deals with the vascularization of the kidney in Chrysemys marginata belli (Gray) and Chelydra serpentina. The arrangement of the vessels in the kidney of the painted turtle produces a true renal portal system while that in the kidney of the snapping turtle permits a considerable amount of blood to shunt around the capillaries of the kidney.

A New Host For The Aspidogastrid Trematode, Cotylogaster Occidentalis, Harry M. Kelly

Proceedings of the Iowa Academy of Science

This trematode, know heretofore only from W. S. Nickerson's one finding in the intestine of the sheepshead, Aplodinotus grunniens, from the Lake Pepin region of the upper Mississippi, occurs not infrequently in a restricted portion of the intestine of the clam, Lampsilis luteola, in West Lake Okoboji. In this same lake it has been taken sparingly from the sheepshead also, and as clams are included in the fish's diet, direct transfer by this means is suggested.

Summer Term Commencement [Program], August 20, 1925, Iowa State Teachers College

UNI Commencement Programs

The program of the commencement ceremonies, including a list of institutional leadership, a list of the departments by college, awards given at the ceremonies, and a list of undergraduate and graduate degree candidates.

The Alumni News Letter, V9n3, July 1, 1925, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.

Spring Term Commencement [Program], June 2, 1925, Iowa State Teachers College

UNI Commencement Programs

The program of the commencement ceremonies, including a list of institutional leadership, a list of the departments by college, awards given at the ceremonies, and a list of undergraduate and graduate degree candidates.

Do We Have "Niter Spots" Forming In Iowa?, Paul Emerson, Don S. Gray

Proceedings of the Iowa Academy of Science

During the winter of 1924-25 the Soils Department of Iowa State College received a number of soil samples taken from a farm in Franklin county. The tenant on this farm claimed the soils were alkaline, basing his conclusion on the poor crop response. The county agent had tested the soils, using the regular potassium thio-cyanate method, and found them slightly acid. The owner was interested in securing a better crop growth. 13. Observations of some-Because of the importance of farm manures considerable attention has been paid from time to time to a study of some of the chemical and biological …

A Provisional List Of The Species Of Septoria In Iowa, B. N. Uppal

Proceedings of the Iowa Academy of Science

There are over 1,200 species of the genus Septoria, all of them being parasitic. Most of the members of the genus occur on wild hosts, but several of them cause diseases of great importance on cultivated plants.

Ceratophyllum Demersum In West Okoboji Lake, Edward N. Jones

Proceedings of the Iowa Academy of Science

Ceratophyllum demersum L. grows luxuriantly in West Okoboji Lake, Dickinson County, Iowa, and occupies an important place in the life program of its waters. During the summers of 1922-23 investigations were made relative to its distribution, position in the macrophytic zone, and general biology. The work was done with the aid of facilities offered by the Iowa Lakeside Laboratory situated on the west side of the lake at the head of Millers Bay.

A Tree Census Of Mt. Pleasant, Iowa, H. E. Jaques

Proceedings of the Iowa Academy of Science

During the winter of 1924-25 it was undertaken to count the trees within the city limits of Mt. Pleasant. The work was done by students of the department of Biology of Iowa Wesleyan College, who were trained in accurate tree identification before the work was begun. All trees over four inches in diameter at breast height were counted. The accuracy of the identification and count was safeguarded in every way possible.

1925 Old Gold, Iowa State Teachers College

UNI Yearbooks

The student yearbook of the Iowa State Teachers College, later known as the University of Northern Iowa.

Index

Proceedings of the Iowa Academy of Science

No abstract provided.

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.

Observations Of Some Biological Activities In Manure Composts, Alfred J. Englehorn

Proceedings of the Iowa Academy of Science

Because of the importance of farm manures considerable attention has been paid from time to time to a study of some of the chemical and biological processes which take place during storage. Early references concerning the proper storage of manure can be found in the Roman literature notably that of Varro or of Columella. During the dark ages all agricultural investigations were dropped and were not revived until the middle of the nineteenth century. At this time the work of such investigators as Wagner, Moerker, Pfeiffer and Voelcker created a new interest in the chemical and biological processes which take …

Bacterial Activities In An Orchard Soil, Rudger H. Walker

Proceedings of the Iowa Academy of Science

One of the chief problems with which soils investigators have been concerned for a number of years is that of securing a laboratory test that will serve as an index to the fertility of the soil. In as much as nitrogen is so important an element in crop production it is believed that the power of the micro-organisms to oxidize the nitrogen of the soil would be an indication of the crop producing power of that soil. A very good review of the literature on this subject has been given by Waksman. (1) (2) After a detailed investigation of this …

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

The Alumni News Letter, V8n1, January 1, 1924, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.

The Relative Values Of The Selenium Cell And The Ionization Methods Of Measuring X-Rays In Roentgenotherapy, Arthur W. Erskine, Scott W. Smith Jr.

Proceedings of the Iowa Academy of Science

The two facts which the roentgenologist must know about a beam of x-rays which he is going to use are its penetrating power and its intensity. The penetrating power of a beam of x-rays produced by any set of technique factors can be determined from charts prepared from the experience of many investigators, including the authors, who have produced a set of 160 charts for that purpose. The charts are drawn actual size and show the distribution of x-rays in water with all the variations in technique commonly used in therapy, - water being used as a medium because the …

College Circular [Catalog] 1924, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents

Calendar for 1924-25 ... 5
Officers of Administration and Instruction ... 6
General Information ... 39
Residence, Student Health, Assembly ... 39
Expenses and Fees ... 40
Free Scholarships ... 41
Extension Service ... 42
College Organizations ... 42
Faculty Organizations ... 46
Training in Actual Teaching ... 43
Public Lectures and Entertainments ... 43
Boarding and Lodging ... 44
Employment of Students ... 45
Twelve Weeks Normal Training ... 45
School Credits in Lieu of Certificate Examinations ... 46
Examinations for Teachers Certificates ... 47
Department Certificates ... 47
Bureau of Recommendations ... 47
Advisers and …

Notes On The Fungous Flora Of Iowa Soils, E. V. Abbott

Proceedings of the Iowa Academy of Science

The study of the fungous flora of soils is a field of research which has received very little attention from scientific investigators. Mycologists have been concerned principally with the fungi which are parasitic on plants, and have devoted little time to those forms found in the soil other than to observe certain stages of the life history of pathogens occurring in the soil. Soil bacteriologists have confined their studies of the soil flora largely to the physiology of certain species of bacteria, while the soil technologist has given no consideration to the microorganic population of the soil.

1924 Old Gold, Iowa State Teachers College

UNI Yearbooks

The student yearbook of the Iowa State Teachers College, later known as the University of Northern Iowa.

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

Photochemical Distribution On The Retina As Shown By The Perimeter, Francis Marsh Baldwin

Proceedings of the Iowa Academy of Science

The extent of the visual field, as well as the distribution of photochemical substances upon it, has been a study of very great interest ever since the end of the eighteenth century, when the English chemist, Dalton, made the classical study upon himself. He was unable to distinguish the various shades of red and for a considerable time afterwards this particular deficiency in color discrimination was termed, "Daltonism." During the latter part of the nineteenth century the subject was given practical importance by a number of observers, especially by the researchers of Holmgren the Swedish physiologist who emphasized its bearing …

Notes On The Biology Of The Leafhopper Eutettix Strobi Fitch, F. A. Fenton

Proceedings of the Iowa Academy of Science

In the vicinity of Ames, Iowa, the leaves of the common pigweed or lamb's quarters, Chenopodium album L. are frequently spotted with a brilliant reddish discoloration. This is due, as Osborn first noted, to the feeding punctures of a small leafhopper, Eutettix strobi Fitch. The writer has observed this species at Ames for several years and has accumulated some scattered notes on its life cycle and also the method of its injury to the pigweed leaves. Since several species of leafhoppers are now known to transmit or carry various plant pathogens, it is thought that these few notes may be …

The Address Of The President - A Century Of Botany In Iowa, L. H. Pammel

Proceedings of the Iowa Academy of Science

A Century of Botany-It is certainly a pleasure to greet you here on this occasion, especially so, because of the nature of the honorable work performed by the scientists of the State of Iowa. It is customary for the retiring president to deliver an address of some kind. In looking over topics which have been chosen by various retiring presidents I find such titles as "Local Problems in Science," "What We Have Been Doing," "The Academy and the People," "Science of One Hundred Years Ago," "Some Problems of Heredity and Evolution," "Two Centuries of North American Lichenology," "Botany in Its …

Odonata (Dragon-Flies And Damsel-Flies) Of Henry County, Charles Hoffman

Proceedings of the Iowa Academy of Science

During the summer of 1923 and the 1923-24 school year the author has been classifying the Odonata of Henry County. Much of the material had been collected several seasons ago by various students. The collecting was done along the railroad tracks, around meadows and ponds, up creeks and sloughs and along the Skunk River. All specimens studied are in the Iowa Wesleyan College collection. The classifications were verified by Mr. E. B. Williamson of Bluffton, Indiana.

A Ten Year's Phenological Record Of The Spring Flowering Plants Of Henry County, H. E. Jaques

Proceedings of the Iowa Academy of Science

In 1915 a record was started in which the date of the first appearance of flowers of our native and cultivated spring plants was kept. A preliminary report was made in 1918. The record now covers ten years and offers ample opportunity for study. Each spring from fifteen to forty students enrolled in some of the botany classes of Iowa Wesleyan College have worked at collecting and making the record. Collecting has been limited to Henry County and most of the specimens are secured within easy reach of Mount Pleasant. Only plants found growing in open ground out of doors …

Index

Proceedings of the Iowa Academy of Science

No abstract provided.