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Pleistocene Exposures In Cedar Rapids And Vicinity, W. D. Shipton
Pleistocene Exposures In Cedar Rapids And Vicinity, W. D. Shipton
Proceedings of the Iowa Academy of Science
Lying as it does near the border of the Iowan drift sheet, in hilly country deeply eroded by Cedar River, it might be expected that the city of Cedar Rapids would contain interesting exposures of Pleistocene deposits. Since any geological description of the region was published, the stripping of quarries, cutting of streets, etc., has led to the creation of many new exposures. Some of these will prove more or less temporary in their nature, and it is in the belief that no time should be lost in making permanent records of them, that the descriptions herein contained are here …
Variation In Evaporation In Limited Areas, D. H. Boot
Variation In Evaporation In Limited Areas, D. H. Boot
Proceedings of the Iowa Academy of Science
During a study made at the Macbride Lakeside Laboratory in the summer of 1913 a series of observation stations were set up on the hill known as "Twin Mounds," on the south shore of East Okoboji lake. This hill rises from the lake front to a height of about 100 feet and has a dense growth of timber on the protected face of its north slope. The top is bare of trees, as also is the entire south slope, which is exposed to the prevailing southwest winds of summer. Seven stations were arranged, located as follows: one on the summit …
Illuminating Power Of Kerosenes Used In Iowa, William Kunerth
Illuminating Power Of Kerosenes Used In Iowa, William Kunerth
Proceedings of the Iowa Academy of Science
The kerosene oil industry in the United States dates back to about the year 1850, although evidences are found in the oil producing regions of Pennsylvania which indicate that the existence of the oil was known long before that date.
Proceedings Of The Twenty-Eighth Annual Session Of The Iowa Academy Of Science: Staff & Committee Reports; Program
Proceedings of the Iowa Academy of Science
No abstract provided.
Sulfofication In Soils, P. E. Brown, E. H. Kellogg
Sulfofication In Soils, P. E. Brown, E. H. Kellogg
Proceedings of the Iowa Academy of Science
Sulfur has long been known to be one of the essential plant food constituents. It has always been believed, however, that there was sufficient present in all soils for optimum crop production. This assumption has been very largely based on Wolff’s analyses of the ash of various crops which showed the presence of very small amounts of sulfur. Several investigators have found a considerable loss of sulfur upon ignition of plants for ash determinations, and recently Hart and Peterson, of Wisconsin, pointed out definitely the inaccuracy of determining the total sulfur of plant tissues by examinations of the ash. They …
1914 Old Gold, Iowa State Teachers College
1914 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.
On The Occurence Of Precious Stones In The Drift, Garrett A. Muilenburg
On The Occurence Of Precious Stones In The Drift, Garrett A. Muilenburg
Proceedings of the Iowa Academy of Science
The subject of precious stones in the glacial drift is brought before the public from time to time by the report of gems being found accidentally either in or upon the drift. Most of the gems are diamonds and occasionally are of considerable size and value. No diamonds have been reported from the drift of Iowa. Several of good quality have been reported from Wisconsin while others have been found in Michigan, Ohio and Indiana.
The Adaption Of Selenium To Measurements Of Energy Too Small To Be Measured By Other Devices, L. P. Sieg, F. C. Brown
The Adaption Of Selenium To Measurements Of Energy Too Small To Be Measured By Other Devices, L. P. Sieg, F. C. Brown
Proceedings of the Iowa Academy of Science
As a brief introduction to the subject matter of this paper, a review of the various devices used in energy measurements will not be amiss. The devices are not numerous, and they are familiar to everyone at all conversant with the methods of physics. They are the thermometer, the differential thermometer, the thermopile, the bolometer, the radiomicrometer, and the radiometer. Several other devices have at different times been suggested and used, but the above represent the most important ones.
Our Pre-Cambrian Rocks, Charles Keyes
Our Pre-Cambrian Rocks, Charles Keyes
Proceedings of the Iowa Academy of Science
Terranes older than those of Paleozoic age occupy in Iowa a very small area. Attention which has been bestowed upon them is about commensurate with their relative surface extent. Heretofore, little attempt has been made to determine their broader stratigraphic relationships, their real position in the general geological column, their possible subdivision, or their role in the geotectonics of the region. It has seemed all sufficient to merely note their existence in the extreme northwest corner of the state. Yet, these very rocks now appear to have a history longer, more complicated and more vicissitudinous than any other terrane represented …
Weed Survey Of Story County, Iowa, L. H. Pammel, Charlotte M. King
Weed Survey Of Story County, Iowa, L. H. Pammel, Charlotte M. King
Proceedings of the Iowa Academy of Science
The matter of the distribution of weeds is one of interest, not only to the phytogeographer, but to the farmer and horticulturist as well. Our alien flora, though Iowa is not an old state, is a large one. In 1879 Dr. Gray prepared a list of the predominant weeds of Eastern North America. In a discussion of weed migration in The Weed Flora of Iowa, I made a comparison of weeds and alien plants in Iowa. In counting the weeds of Iowa I find that 172 of that list occur in Iowa. This list can be augmented by the addition …
Some Observations On Sycamore Blight And Accompanying Fungi, J. P. Anderson
Some Observations On Sycamore Blight And Accompanying Fungi, J. P. Anderson
Proceedings of the Iowa Academy of Science
Last spring (1913) the Sycamore blight (Gnomonia veneta (Sacc. & Speg.) Kleb.) was very prevalent and destructive in the vicinity of Ames. All the large trees along Squaw Creek looked as though the young foliage and growth had been killed by frost except a few tufts in the extreme tops of the trees. Young trees several years planted suffered somewhat, but none to the extent that the large trees did. About one-half of these young trees showed some traces of the disease. During August the effects of its ravages were noted in eastern Nebraska and at Lamoni, Decatur County, Iowa. …
Notes On Variation In Micranthes Texana, L. A. Kenoyer
Notes On Variation In Micranthes Texana, L. A. Kenoyer
Proceedings of the Iowa Academy of Science
In the spring of 1900 I discovered near Independence, southeastern Kansas, a plant which had hitherto been unreported in the state. On submitting specimens to the National Herbarium, I determined it to be Buckley's Saxifraga texana, which was discovered in Texas about 1861. The plant has since been placed in Small's segregated genus, Micranthes, and has been reported from a few widely scattered localities in north Texas, Arkansas, and southeast Missouri.
Some Evidence Of Recent Progress In Geology, George F. Kay
Some Evidence Of Recent Progress In Geology, George F. Kay
Proceedings of the Iowa Academy of Science
In a recent publication by President Van Hise it was stated that the data of geology have become so numerous that they are almost unmanageable. With this view all geologists will agree. Not many decades ago it was possible for a geologist to have a reasonably full and satisfactory knowledge of his own science, and, also, to be fairly familiar with the related sciences. Now it is impossible for any geologist to learn all the important facts about all the branches of his own science. Not only is this true, but no geologist can know all the discovered facts of …
The Electrical Conductivity Of Solutions Of Certain Electrolytes In Organic Solvents, J. N. Pearce
The Electrical Conductivity Of Solutions Of Certain Electrolytes In Organic Solvents, J. N. Pearce
Proceedings of the Iowa Academy of Science
The study of the electric conductivity of solutions in organic solvents has brought to light many interesting relations. In many such solvents the same general relation obtains as is found in the case of aqueous solutions, viz., the molecular conductivity increases regularly with increasing dilution. In the great majority of these no limiting value of the molecular conductivity is obtainable, however great the dilution employed.
A List Of The Lepidoptera Of Linn County, Iowa, Geo. H. Berry
A List Of The Lepidoptera Of Linn County, Iowa, Geo. H. Berry
Proceedings of the Iowa Academy of Science
This list is based upon twenty years' collecting in Linn county by the author, together with the examination of the collection made by Dr. E. P. Childs, now in the Coe College museum; and of private collections in Maine, Grant, College, Brown and Fairfax townships.
Notes On The Ecology Of Iowa Lichens, Zoe R. Frazier
Notes On The Ecology Of Iowa Lichens, Zoe R. Frazier
Proceedings of the Iowa Academy of Science
Many interesting features are presented by this group of organisms, some of which have been investigated more or less thoroughly, while others have received comparatively little attention. The work with Iowa lichens has consisted almost entirely of reporting and describing species, with only very limited reference to structural modifications of thalli, and the relation between this and the ability of lichens to withstand adverse atmospheric conditions. In this, lichens are perhaps the most remarkable organisms in existence, and the full investigation of the secrets of this power offers an excellent field for the student of special problems.
Officers, Past Presidents, And Members, Iowa Academy Of Science
Officers, Past Presidents, And Members, Iowa Academy Of Science
Proceedings of the Iowa Academy of Science
No abstract provided.
The Sand Of Sylvan Beach, New York, Nicholas Knight
The Sand Of Sylvan Beach, New York, Nicholas Knight
Proceedings of the Iowa Academy of Science
The study of the electric conductivity of solutions in organic solvents has brought to light many interesting relations. In many such solvents the same general relation obtains as is found in the case of aqueous solutions, viz., the molecular conductivity increases regularly with increasing dilution. In the great majority of these no limiting value of the molecular conductivity is obtainable, however great the dilution employed.
The Blue Book Of Iowa Women, Winona Evans Reeves
The Blue Book Of Iowa Women, Winona Evans Reeves
Iowa Book Gallery
A collection of brief biographies of Iowa women.
Title Page - Letter Of Transmittal, James H. Lees
Title Page - Letter Of Transmittal, James H. Lees
Proceedings of the Iowa Academy of Science
No abstract provided.
Table Of Contents - Authors' Index
Table Of Contents - Authors' Index
Proceedings of the Iowa Academy of Science
No abstract provided.
Memorial Note On Seth Eugene Meek, Charles Keyes
Memorial Note On Seth Eugene Meek, Charles Keyes
Proceedings of the Iowa Academy of Science
No abstract provided.
The Des Moines Diphtheria Epidemic Of 1912-13, Chas. A. Wylie
The Des Moines Diphtheria Epidemic Of 1912-13, Chas. A. Wylie
Proceedings of the Iowa Academy of Science
No abstract provided.
Bacterial Content Of Desecated Egg, L. S. Ross
Bacterial Content Of Desecated Egg, L. S. Ross
Proceedings of the Iowa Academy of Science
The value of eggs as an article of food for human consumption has been recognized for a long period of time. The relative value, as compared to other available food products, may be subject to further investigation, even though much work has already been done. But whatever may be the variance in conclusions, yet the fact of the great food value of eggs has been established by experiment and by practical experience. With the realization of the value of a food, is an attendant increased consumption and the necessity for increased production, and also the advisability of extending the period …
An Incubator Opening To The Outside Of The Building, L. S. Ross
An Incubator Opening To The Outside Of The Building, L. S. Ross
Proceedings of the Iowa Academy of Science
Having had the experience more than once of being routed out of bed after ten o'clock on winter nights to make journeys to the laboratory with diphtheria tubes to put into the incubator for early morning microscopical examination, and also of many an after-supper trip to see if any belated tubes had been dropped into the box prepared for them, it occurred to me that an incubator might be arranged so a tube in its containing case could be dropped into it from the outside of the building. I had a box so arranged, why not an incubator?
Comparison Of Field And Forest Floras In Monona County, Iowa, D. H. Boot
Comparison Of Field And Forest Floras In Monona County, Iowa, D. H. Boot
Proceedings of the Iowa Academy of Science
The purpose of this paper is to present some of the results obtained in a study made of the field and forest floras of St. Clair Township, Monona County, which indicate the close relations existing between the floras of the most extreme types of plant habitat found in Iowa.
Notes On A Fossil Tree-Fern Of Iowa, Clifford H. Farr
Notes On A Fossil Tree-Fern Of Iowa, Clifford H. Farr
Proceedings of the Iowa Academy of Science
The members of the Psaroneae comprise a family of ferns which lived during later Paleozoic times and often developed to treelike dimensions. Some believe that they were closely related to the Cyatheaceae, to which modern tropical tree-ferns belong. Most botanists, however, consider the Psaroneae a family of the order Marattiales. Members of this order still live, but, though tropical, are, for the most part, low forms with stump-like stems and enormous leaves. The Marratiales have been sometimes thought of as ancestors of the Pteridospermae, and it is possible that the Psaroneae may yet be associated with this latter group. Specimens …
A Preliminary Report On The Flora Of Linn County, E. D. Verink
A Preliminary Report On The Flora Of Linn County, E. D. Verink
Proceedings of the Iowa Academy of Science
During the past twenty years, under the incumbency of a number of professors in Coe College, the college herbarium was enriched by the collection of a large number of plants indigenous to Linn County. For many years these were poorly housed, room for herbarium facilities was lacking, and the collection was consequently neglected. The building of a new science hall has made it possible for the first time to revise this collection. The author has also spent three seasons collecting specimens in Linn County and, through the kindness of Mr. Geo. H. Berry, had access to the herbarium of the …
Sunflecks, W. H. Davis
Sunflecks, W. H. Davis
Proceedings of the Iowa Academy of Science
On Sunday, June 28, 1908, between 9:27 a. m., and 12:41 p. m., there occurred a seven-eighths eclipse of the sun. Thinking that I might procure some eclipse pictures, I loaded my plate-holder with 5 inch by 7 inch Standard Orthonon plates.
Introduced Plants Of The Clear Creek Canon, Colorado, L. H. Pammel
Introduced Plants Of The Clear Creek Canon, Colorado, L. H. Pammel
Proceedings of the Iowa Academy of Science
It is always interesting to note changes in the flora since the advent of man. With this end in view, the writer made some notes on the plants found in the Clear Creek Canon, Colorado. The first settlement was made in the vicinity of Idaho Springs. A small monument marks the discovery of gold in this region in 1859, on what is known as Chicago Creek. Gold mining has been carried on in this vicinity continuously since.