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Title Page - Letter Of Transmittal, Herbert Osborn
Title Page - Letter Of Transmittal, Herbert Osborn
Proceedings of the Iowa Academy of Science
No abstract provided.
Proceedings Of The Ninth Annual Session Of The Iowa Academy Of Sciences; Staff & Committee Reports, Herbert Osborn
Proceedings Of The Ninth Annual Session Of The Iowa Academy Of Sciences; Staff & Committee Reports, Herbert Osborn
Proceedings of the Iowa Academy of Science
The ninth annual meeting of the Iowa Academy of Sciences was held in the Y. M. C. A. building at Des Moines, December 27 and 28. The following papers were read in full or by title, and by the action of the Academy were referred to a committee of publication consisting of C. R. Keyes, T. P. Hall and H. F. Bain.
Constitution Of The Academy & Articles Of Incorporation
Constitution Of The Academy & Articles Of Incorporation
Proceedings of the Iowa Academy of Science
No abstract provided.
Address Of The Retiring President - Recent Advances In The Theory Of Solutions, Launcelot W. Andrews
Address Of The Retiring President - Recent Advances In The Theory Of Solutions, Launcelot W. Andrews
Proceedings of the Iowa Academy of Science
Ten years ago nothing was known of the molecular magnitudes of substances which could not be converted into the gaseous condition. Concerning the constitution of the much greater number of compounds that exist only as solids or liquids, our ignorance was complete.
Preglacial Elevation Of Iowa, H. Foster Bain
Preglacial Elevation Of Iowa, H. Foster Bain
Proceedings of the Iowa Academy of Science
The long period intervening between the deposit of the Cretaceous rocks of Iowa and the advent of the glaciers has left in this state no record in deposits. Its history must be gathered entirely from the land forms then created, and from inferences drawn from orographic changes known to have taken place in other regions.
How Old Is The Mississippi?, Francis M. Fultz
How Old Is The Mississippi?, Francis M. Fultz
Proceedings of the Iowa Academy of Science
In asking this question it is not intended to open for discussion when and how each particular part of the great river came into existence. Nor will it be expected to prove whether or not it is now everywhere following the course it first selected for itself. But the effort will be to show that its prototype must have existed at a certain fixed time in the distant geologic past. In fixing this date it must be understood that the claim is not made that the river course surely dates from that time, but that it existed at least as …
Occurrence Of Megalomus Canadensis, Hall, In The Leclaire At Port Byron, Illinois, William Harmon Norton
Occurrence Of Megalomus Canadensis, Hall, In The Leclaire At Port Byron, Illinois, William Harmon Norton
Proceedings of the Iowa Academy of Science
This common fossil of the Guelph of Canada has not been noted in the Le Claire beds of Iowa, or their immediate extension into adjacent states. Its occurrence, therefore, at Port Byron, Illinois, in the Barrett quarries one and one-half miles north of the town, is of special interest, since it shows a range much further to the west than hitherto observed, and a co-mingling of the Guelph and Niagara faunas in the Le Claire, similar to that in the so-called Guelph of Wisconsin. The specimens are well preserved, casts of the normal type not conforming to the variety of …
Nitrogen Compounds Of The Soil, D. B. Bisbee
Nitrogen Compounds Of The Soil, D. B. Bisbee
Proceedings of the Iowa Academy of Science
In examining for ammonia a soil-extract, prepared by digesting soil for three days in dilute HCl, the author noticed that Schloesing's method (distilling the extract with excess of MgO) gave a continuous separation of ammonia, amounting in this case to.0024 per cent. Another portion of the extract was filtered after the addition of MgO and before boiling. In it the separation of ammonia ceased after boiling a comparatively short time, and the total separated was.0017 per cent. The evident inference is that "part of the amides in Schloesing's extract can be precipitated by magnesia; and, by the second method ‘results …
A Chemical Study Of Honey, W. H. Heileman
A Chemical Study Of Honey, W. H. Heileman
Proceedings of the Iowa Academy of Science
It has long been known that honey is composed chiefly of dextrose and levulose (reducing sugars), with a small per cent of sucrose. These, with water and ash, are generally all that is given in an analysis, and their sum invariably falls from three to ten per cent below one hundred. The results of analyses vary with different examples, as shown by the following summary of results, obtained by different observers.
Some Bred Parasitic Hymenoptera In The Iowa Agricultural College Collection, Alice M. Beach
Some Bred Parasitic Hymenoptera In The Iowa Agricultural College Collection, Alice M. Beach
Proceedings of the Iowa Academy of Science
This list is prepared from the material in the collections of the Iowa Agricultural College and the Iowa Experiment Station, and may be considered a preliminary record of the parasitic Hymenoptera of the state. In its preparation the notes and records made by Prof. C. P. Gillette, while entomologist of the Experiment Station, have been freely consulted and largely drawn upon. The list is still incomplete for much material yet remains to be classified and records to be filled out.
A Study Of The Physical Properties Of Solutions Of Lithium Chloride In Amyl Alcohol, Launcelot W. Andrews, Carl Ende
A Study Of The Physical Properties Of Solutions Of Lithium Chloride In Amyl Alcohol, Launcelot W. Andrews, Carl Ende
Proceedings of the Iowa Academy of Science
There can be no doubt that much light can be thrown upon the nature of electrolytic processes by a systematic examination of electrolytes containing no water; for the principles of the Electrolytic Dissociation Theory, if general, must be valid, not only for solutions in water, but also for all others, and conclusions derived from the study of the former can best receive independent confirmation or rebuttal by a careful investigation of the latter. The questions upon which such an investigation should bear are chiefly these: 1. Does Ostwald's Law of Dilution hold good for non-aqueous solutions? 2. In what way …
Distribution Of Some Weeds In The United States, Especially Iva Xanthifolia, Lactuca Scariola, Solanum Corolineum And Solanum Rostratum, L. H. Pammel
Proceedings of the Iowa Academy of Science
One of the interesting parts dealing with geographical botany is the question of the distribution of plants over the earth's surface, where man has played an important part. Many changes have occurred in the character of our North American flora since it has been occupied by man. In many cases it has become quite impossible to tell when and where plants were first introduced. We have, it is true, in some cases records when plants were introduced, but in the vast majority of cases there were no records at hand. Early collectors in many cases simply mentioned vague localities with …
Structure Of The Seed Coats Of Polygonaceae, Emma Sirrine
Structure Of The Seed Coats Of Polygonaceae, Emma Sirrine
Proceedings of the Iowa Academy of Science
Much work has been done on the structure of the seed coats of different orders of plants. The objects of studying the seed coats of plants microscopically are two-fold. First to help detect adulterated foods, etc., and in this respect the study has been of very great value. Second, to aid in the distinction and separation of species.
Lichens Collected By Dr. C. C. Parry In Wisconsin And Minnesota In 1848, Bruce Fink
Lichens Collected By Dr. C. C. Parry In Wisconsin And Minnesota In 1848, Bruce Fink
Proceedings of the Iowa Academy of Science
The lichens of this collection are all conspicuous foliaceous or fruticulose forms. One striking feature is the evident care of the collector to preserve excellent specimens. There are no notes accompanying each packet. However, if all were collected in one of the above named states as is stated on the card accompanying the package sent me, the collection is a very good one, as Cetraria Islandica, Evernia vulpina, and Stereocaulon puschale, are probably new or very rare in either state. The same may probably be said of the two Umbilicarias listed.
Study Of Glands In The Hop-Tree, Cassie M. Bigelow
Study Of Glands In The Hop-Tree, Cassie M. Bigelow
Proceedings of the Iowa Academy of Science
In studying this plant, the main object has been to bring out the characteristics of the glandular structures in Ptelea trifoliata and the differences between the glandular structure of this plant and other used in a like way as the hop.
Graphic Representation Of The Properties Of The Elements, T. Proctor Hall
Graphic Representation Of The Properties Of The Elements, T. Proctor Hall
Proceedings of the Iowa Academy of Science
In Mendeleeff's classification the elements are arranged in order on a plane surface, so as to increase along one axis in atomic weight, and along the other axis in valence. The properties of an element can then, to some extent, be inferred from its relation to the others on the diagram. Some of the relations are found to be better expressed when the surface is made cylindrical.
Pollination Of Cucurbits, L. H. Pammel, Alice M. Beach
Pollination Of Cucurbits, L. H. Pammel, Alice M. Beach
Proceedings of the Iowa Academy of Science
During the season of 1892 one of us was engaged in crossing some of the cultivated cucurbits. Incidentally some attention was given to their pollination. As comparatively little has been published concerning the pollination of these plants, these notes may be of interest.
Psyllidae Found At Ames, C. W. Mally
Psyllidae Found At Ames, C. W. Mally
Proceedings of the Iowa Academy of Science
While studying Hackberry Psyllidae last year, several other interesting species were found. This led to a general study of the family as represented in this locality. It was the original intention to give a general account of the anatomy and life history, with descriptions of new species. However, only the latter part is given at this time.
Cement Materials In Iowa, E. H. Lonsdale
Cement Materials In Iowa, E. H. Lonsdale
Proceedings of the Iowa Academy of Science
Sometime after the discovery of massive deposits of the Cretaceous chalk in the northwestern portion of the state the question arose as to the adaptability thereof-- whether this calcareous material might be considered of any practical value and if so what means should be taken to reduce it preparatory to its application. Certain initiatory steps were undertaken towards determining these points but as yet but little has been done. Chemical analyses have been made of the rock and test shafts put down in order to ascertain the thickness of the beds, but further development has never been attempted.
Mississippian Rocks Of Central Iowa, H. Foster Bain
Mississippian Rocks Of Central Iowa, H. Foster Bain
Proceedings of the Iowa Academy of Science
The Mississippian series includes all the rocks lying between the base of the coal measures and the top of the Devonian. They have been principally studied in southeastern Iowa and adjacent portions of neighboring states. More recently the study of the exposures of that portion of central Iowa which includes Marion, Mahaska, Keokuk, and Washington Counties has allowed the construction of a central Iowa section.
Formation Of The Flint Beds Of The Burlington Limestones, Francis M. Fultz
Formation Of The Flint Beds Of The Burlington Limestones, Francis M. Fultz
Proceedings of the Iowa Academy of Science
For convenience the flint beds of the Burlington limestones are usually separated into two divisions, known as the "lower" and '' upper '' flint beds. The lower series is probably from fifteen to twenty feet thick and the upper a little more. They have always been classed as the latest deposits of the Lower Burlington and Upper Burlington limestones, respectively. The lower beds are not so continuously chert as the Upper; in fact much of the deposit is siliceous shale mixed with clay and containing thin bands of limestone. There are also certain strata which look like heavy-bedded limestone, but …
Geological Section Of The Y.M.C.A. Artesian Well At Cedar Rapids, Iowa, Wiliam Harmon Norton
Geological Section Of The Y.M.C.A. Artesian Well At Cedar Rapids, Iowa, Wiliam Harmon Norton
Proceedings of the Iowa Academy of Science
The record of this well is of special importance because it supplements and corrects the published records of the earlier city wells. It is based almost wholly upon drillings taken at frequent intervals directly from the sand pump. Unfortunately samples of the first ninety feet were not saved, within which space the drill must have passed through the beds lying between the lowest recognized Devonian and the Le Claire beds of the Upper Silurian. The interval, in part at least, can be supplied from outcrops in the immediate vicinity.
Upper Carboniferous Of Southwestern Iowa, E. H. Lonsdale
Upper Carboniferous Of Southwestern Iowa, E. H. Lonsdale
Proceedings of the Iowa Academy of Science
The district at hand is one somewhat remote from any known field of productive Coal Measures, but being Upper Carboniferous in age is a region to which considerable geological and economical interest has been attached. There has always been an anticipation of finding heavy fuel veins, but as yet these looked-for strata have not been positively located. Reports, often manufactured, and the meeting of thinner veins of coal, have led to the increased expectations now prevalent in the district.
Diseases Of Plants At Ames, 1894, L. H. Pammel
Diseases Of Plants At Ames, 1894, L. H. Pammel
Proceedings of the Iowa Academy of Science
To fully discuss the fungus diseases of plants we should consider all matters that have a bearing on the question. One of the most essential conditions is the character of the weather. The relative humidity and precipitation are very important factors in the development of fungi. The germination of spores depends largely on the humidity of the atmosphere.
Coincidence Of Present And Preglacial Drainage System In Extreme Southeastern Iowa, Francis M. Fultz
Coincidence Of Present And Preglacial Drainage System In Extreme Southeastern Iowa, Francis M. Fultz
Proceedings of the Iowa Academy of Science
The drainage system in southeastern Iowa is believed to be practically the same today that it was in pre-glacial times. By southeastern Iowa reference is made to the counties of Louisa, Des Moines, Lee, and the eastern part of Henry. Present evidence shows that every stream of any importance is now occupying a pre-glacial bed. This applies to the Mississippi River except possibly that part of the great river which lies between Montrose and Keokuk, where, for ten or twelve miles, it flows over a rock bed, making rapids so shallow as to necessitate a canal for the accommodation of …
Extension Of The Illinois Lobe Of The Great Ice Sheet Into Iowa, Francis M. Fultz
Extension Of The Illinois Lobe Of The Great Ice Sheet Into Iowa, Francis M. Fultz
Proceedings of the Iowa Academy of Science
In the great southern flow of ice, two streams, one coming through Iowa and the other through Illinois, apparently merged their forces in the valley of the Mississippi. This union extended from somewhere near where Clinton now stands to about the present site of St. Louis. It is not at all likely that the ice streams first met at the northern point indicated; for the center of the movement on the Illinois side was well over towards the eastern part of the state, and likewise the center of the Iowa lobe was a goodly distance away from the Mississippi. From …
Glacial Markings In Southeastern Iowa, Francis M. Fultz
Glacial Markings In Southeastern Iowa, Francis M. Fultz
Proceedings of the Iowa Academy of Science
In the third annual report of the Iowa Geological Survey Dr. C. R. Keyes has treated, at considerable length, of the glacial scorings in Iowa. Among others, several localities were given from Des Moines County, of which two were described somewhat in detail by the present writer. Since the above mentioned article was prepared a somewhat more extended and minute search has been made, with the result that several other localities showing glacial scratches have been discovered. Also, some attention has been given to a study of the phenomena accompanying these markings, with a view of determining the general direction …
Officers And Members, Iowa Academy Of Sciences
Officers And Members, Iowa Academy Of Sciences
Proceedings of the Iowa Academy of Science
No abstract provided.
Secular Decay Of Granitic Rocks, Charles Rollin Keyes
Secular Decay Of Granitic Rocks, Charles Rollin Keyes
Proceedings of the Iowa Academy of Science
The surface of Iowa, and of the neighboring states north and east as well, is strewn with boulders of granite, diabase, porphyry, and other igneous rocks in various stages of decomposition, and of all sizes, from a few inches to 50 feet or more in diameter. These are all more or less rounded or sub-spherical, though often flattened. They have all been transported by ice from the north. When traced back to their original ledges the latter are usually found to be very smooth and fresh, with practically no indications of decay.