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Meteorites In The Coe College Museum Cedar Rapids, Iowa, Glenn S. Dillé Jan 1928

Meteorites In The Coe College Museum Cedar Rapids, Iowa, Glenn S. Dillé

Proceedings of the Iowa Academy of Science

There are a number of meteorites in the Coe College Museum collections, most of which are fragments or individuals of falls recorded from the state of Iowa. A few are from other states. Much of the material is fragmentary, some are entire, others are parts of stony meteorites.

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The Growth Of The Hand And Wrist From Birth To Maturity, Bird T. Baldwin Jan 1928

The Growth Of The Hand And Wrist From Birth To Maturity, Bird T. Baldwin

Proceedings of the Iowa Academy of Science

This study gives a detailed analysis of the anatomical growth of children as indicated by the development of the carpal bones of the wrist, the epiphyses of the large bones of the forearm and hand, and the sesamoid bones of the hand and wrist. The study has been patiently carried on for four years with a view to discovering basic anatomical principles of growth from the particular angles of successive changes in carpal bone development.

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The Dissection Of An Abnormally Developed Foetal Pig With Notes On The Possible Origins Of Such "Freaks", F. L. Fitzpatrick Jan 1928

The Dissection Of An Abnormally Developed Foetal Pig With Notes On The Possible Origins Of Such "Freaks", F. L. Fitzpatrick

Proceedings of the Iowa Academy of Science

At the 1926 meeting of the Iowa Academy of Science the writer reported on the anatomy of an abnormally developed chick. At the time a statement was made to the effect that such cases were probably not uncommon although they were infrequently recorded in the literature.

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When Cedar Falls Was Young, Roger Leavitt Jan 1928

When Cedar Falls Was Young, Roger Leavitt

Iowa Book Gallery

This booklet recounts historical incidents in the early history of Cedar Falls, Iowa, form 1845 to 1866.

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Proceedings Of The Forty-Second Annual Meeting Of The Iowa Academy Of Science, Held At Grinnell, May 5, 1928: Minutes Of The Meeting; Staff & Committee Reports Jan 1928

Proceedings Of The Forty-Second Annual Meeting Of The Iowa Academy Of Science, Held At Grinnell, May 5, 1928: Minutes Of The Meeting; Staff & Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

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In Memoriam: J. H. Paarmann; Bruce Fink; Melvin P. Somes; Addie Grace Wardle; Clifford H. Farr, L. H. Pammel, A. O. Thomas, Nicholas Knight, Robert B. Wylie Jan 1928

In Memoriam: J. H. Paarmann; Bruce Fink; Melvin P. Somes; Addie Grace Wardle; Clifford H. Farr, L. H. Pammel, A. O. Thomas, Nicholas Knight, Robert B. Wylie

Proceedings of the Iowa Academy of Science

No abstract provided.

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Status Of Stream Pollution In Iowa, A. H. Wieters Jan 1928

Status Of Stream Pollution In Iowa, A. H. Wieters

Proceedings of the Iowa Academy of Science

Under the Iowa Stream Pollution Law, adopted in 1923, the State Department of Health is charged with the administration of antipollution measures. The law requires specifically that the State Department shall investigate conditions of alleged pollution and may issue orders for the remedying of such pollution. If the work contemplated under any such order exceeds $5,000 in cost, the State Executive Council must approve such order.

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The Nitrate Assimilating Power Of The Soil And Some Nitrate Assimilating Soil Bacteria, Frederick B. Smith Jan 1928

The Nitrate Assimilating Power Of The Soil And Some Nitrate Assimilating Soil Bacteria, Frederick B. Smith

Proceedings of the Iowa Academy of Science

The utilization of such crop residues as wheat and oat straw presents a perplexing problem, especially to the grain farmer who would maintain the organic matter content of his soil. It has been generally observed that such materials added to the soil decrease the yields of the following crops.

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Bacteria In Some Iowa Soil Profiles, P. E. Brown, T. H. Benton Jan 1928

Bacteria In Some Iowa Soil Profiles, P. E. Brown, T. H. Benton

Proceedings of the Iowa Academy of Science

Recent developments in soil science have called attention to the importance of studying and describing soils according to their profile characteristics. The various horizons or layers represented in each profile have certain definite and significant characteristics which may aid in the classification of the soils and may also have some effect on the fertility or crop producing power of the soil. The chemical and physical properties of the distinct horizons in typical soil profiles are being studied and some interesting data are being secured. The study will not be complete, however, until there is investigation of the biological properties of …

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Tests On Soilvita, L. W. Erdman, P. E. Brown Jan 1928

Tests On Soilvita, L. W. Erdman, P. E. Brown

Proceedings of the Iowa Academy of Science

Soil vita (soil life) is a preparation on the market for the inoculation of all crops. It is claimed that this culture "grows better and larger crops of all grains, vegetables, beautiful lawns and luxuriant flowers." The culture is supposed to contain all desirable soil organisms except the legume bacteria and the introduction of these organisms into the soil is supposed to bring about a great stimulation in the production of available plant food and hence in the yields of all crops.

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Some Biological Effects Of Certain Nitrogen Fertilizers, P.E. Brown, F. H. Mendell Jan 1928

Some Biological Effects Of Certain Nitrogen Fertilizers, P.E. Brown, F. H. Mendell

Proceedings of the Iowa Academy of Science

Numerous investigations in the past have shown that nitrogen fertilizers may exert a rather pronounced stimulative effect upon certain biological soil processes. The results of such a stimulation may prove distinctly beneficial to crop growth and the effects of the treatment may, therefore, be of economic significance.

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Factors Influencing The Thermal Death Time Of Microorganisms, C. H. Werkman Jan 1928

Factors Influencing The Thermal Death Time Of Microorganisms, C. H. Werkman

Proceedings of the Iowa Academy of Science

While it has been shown that the time required to destroy a bacterial suspension lengthens with increase in the number of organisms present no detailed study of the relationship has been made. The present paper details the results of such a study made on Staphylococcus aureus with methyl mercuric nitrate.

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Epidemiology Of Poliomyelitis (Infantile Paralysis) With Special Reference To Its Occurrence In Iowa, Henry Albert Jan 1928

Epidemiology Of Poliomyelitis (Infantile Paralysis) With Special Reference To Its Occurrence In Iowa, Henry Albert

Proceedings of the Iowa Academy of Science

The study of the epidemiology of infantile paralysis must take into consideration three types of the disease, namely: 1. The mild abortive type representing a systematic infection. 2. The non-paralytic meningic type representing invasion of the central nervous system by the virus. 3. The paralytic type indicating destruction of the cells in the anterior horn of the spinal cord.

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Swimming Pool Sanitation At The University Of Iowa, Jack J. Hinman Jr. Jan 1928

Swimming Pool Sanitation At The University Of Iowa, Jack J. Hinman Jr.

Proceedings of the Iowa Academy of Science

The University of Iowa has operated two swimming pools since January, 1916, and a third pool since February, 1927. The operation of these pools has been under the direction of the writer, and close supervision by laboratory examination has been regularly applied by means of samples collected daily. The experience at the University of Iowa shows that the quality of swimming pool waters is liable to very rapid fluctuation and that if the pools are to be maintained in sanitary condition close watch must be kept upon the quality of the water and the treatment applied must be based upon …

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Competition Studies In The Ecotone Between Prairie And Woodland, J. M. Aikman Jan 1928

Competition Studies In The Ecotone Between Prairie And Woodland, J. M. Aikman

Proceedings of the Iowa Academy of Science

The tall grass prairie forms a belt across the United States from Canada to Mexico. This belt lies between the deciduous forest on the east and the plains association on the west. It is approximately 250 miles wide except at a point slightly above the middle where it extends to about three times this width from eastern Nebraska across Iowa and northern Missouri, Illinois and Indiana into western Ohio.

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Additional Notes On Iowa Mosses, Betty Blagg Jan 1928

Additional Notes On Iowa Mosses, Betty Blagg

Proceedings of the Iowa Academy of Science

Since May, 1927, thirty-five new species and varieties of moss have been added to the collection at Iowa Wesleyan College. While the writer had not thought it possible, on account of other duties, to continue the study of mosses, they have proved so irresistibly fascinating that a few specimens have been picked up, although at decidedly odd moments. One day, however, was spent in a definite collecting trip, in Grannis Hollow, Fayette County. In that one hollow twelve species were found not hitherto reported for Iowa. One hardly dares imagine the number that might be found if a thorough study …

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Notes On Iowa Fungi — 1927, G. W. Martin Jan 1928

Notes On Iowa Fungi — 1927, G. W. Martin

Proceedings of the Iowa Academy of Science

I. Merulius anzericanus as a timber rot. II. Collybia myriadophylla Pk. III. Tricholoma panaeolum Fr. IV. Longevity of fruiting bodies of Pleurotus ostreatus. V. Cordyceps capitata Lk.

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Sap Hydrion Concentration As A Factor In Plant Metabolism, Walter F. Loehwing Jan 1928

Sap Hydrion Concentration As A Factor In Plant Metabolism, Walter F. Loehwing

Proceedings of the Iowa Academy of Science

In poorly drained humid portions of the glacial drift area of the eastern half of the United States occur certain unproductive organic soils which superficially resemble fertile loams. Analyses of these unproductive types generally disclose high acidity and mineral deficiency, especially of potassium. In many instances, however, lime employed to correct acidity, and potash to increase the nutrient value of the soil have proven injurious instead of beneficial to grain crops. The present investigation was undertaken to determine the explanation of the anomalous response and the exact nature of the injury.

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Prairie Vegetation And Environmental Factors, Myrel Burk Jan 1928

Prairie Vegetation And Environmental Factors, Myrel Burk

Proceedings of the Iowa Academy of Science

This study of the vegetation and habitat factors of a small area of prairie was begun June 25 and terminated July 18, 1927, when the grass was mowed for hay. The region studied is located in the southwest quarter of the southeast quarter of section 6, Bennington Township, Black Hawk County, Iowa. Physiographically, it is on the summit of the divide between tributaries of the Reel Cedar and Wapsipinicon rivers. This small area is gently rolling and slopes toward the south. The surface soil is dark brown or black loam under which a yellow, pebbly clay is found.

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Temperature And Catalase Activity In Germinating Corn, C. W. Lantz Jan 1928

Temperature And Catalase Activity In Germinating Corn, C. W. Lantz

Proceedings of the Iowa Academy of Science

Catalase is an enzyme almost universally present in living cells and has the power of breaking hydrogen peroxide into water and molecular oxygen. The various theories as to the significance of catalase in metabolism are conflicting. Catalase has been considered by some as an enzyme directly correlated with respiration, others have failed to find such a correlation.

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March Cress, Its Geography And Ecology In Iowa, L. H. Pammel, C. M. King, Ada Hayden Jan 1928

March Cress, Its Geography And Ecology In Iowa, L. H. Pammel, C. M. King, Ada Hayden

Proceedings of the Iowa Academy of Science

Early in the spring of 1927 our attention was called to the prevalence of marsh cress in the state. This is not the first season that this weed has been so common. Apparently its appearance is more or less periodic or sporadic, depending upon weather conditions of the previous season.

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Germination Studies Of Some Trees And Shrubs, 1928, L. H. Pammel, C. M. King Jan 1928

Germination Studies Of Some Trees And Shrubs, 1928, L. H. Pammel, C. M. King

Proceedings of the Iowa Academy of Science

The studies for the spring of 1928 are a continuation of previous work and constitute the eleventh contribution to the series. In the present paper seedlings of twenty-three species of plants are described, the germination periods noted, and the seedlings figured. These plants include both native and introduced forms. The seeds were contributed by Arnold Arboretum and other sources, many being the collections of the senior author in the field.

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The Simultaneous Adsorption Of Salt By Colloidal Aluminium Hydroxide, Ben H. Peterson Jan 1928

The Simultaneous Adsorption Of Salt By Colloidal Aluminium Hydroxide, Ben H. Peterson

Proceedings of the Iowa Academy of Science

In a series of studies on the adsorption of electrolytes by colloidal suspensions of metallic hydroxides, Sen and his collaborators have measured the adsorption of a large number of electrolytes by various hydroxides. In determining the adsorption of acids by colloidal Ferric Hydroxide, he precipitated the colloid by means of KCl and NH4Cl inasmuch as the acids tended to stabilize the sol. The effect of the salts was considered to be negligible upon the adsorption of the acids.

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Copper Salts In Nutrition, John M. Evvard, V. E. Nelson, W. E. Sewell Jan 1928

Copper Salts In Nutrition, John M. Evvard, V. E. Nelson, W. E. Sewell

Proceedings of the Iowa Academy of Science

A great deal of work has been done on the distribution of copper in plant and animal matter. It is not the intention of the authors to critically review all of the work of a biological nature concerning this element but only such as applies to the problem at hand. Investigations concerning the presence and role of copper in marine life are numerous. Harless found this metal in combination with protein in the blood of Eledone and Helix Pomatia and concluded that it functioned in a manner similar to that of hemoglobin of higher animals. Fredericq also said that copper …

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A Study Of The Absorption Of Hydrogen Bromide By Cinnamic Acid In The Presence Of Ultra Violet Light, Gladys M. Woods, Thomas C. Poulter Jan 1928

A Study Of The Absorption Of Hydrogen Bromide By Cinnamic Acid In The Presence Of Ultra Violet Light, Gladys M. Woods, Thomas C. Poulter

Proceedings of the Iowa Academy of Science

In the absorption of various reagents at the double bond of organic compounds it has been noted that in some cases a different product was obtained when the absorption was carried out in the presence of ultra-violet light. This difference has been frequently explained on the basis that the polarity of the reagent being absorbed was changed by the ultra-violet light. The question has been raised as to whether the difference was actually due to the change in polarity in the double bond.

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The Effect Of Lecithin In Dairy Products Upon Butter Fat Determination, O. W. Chapman Jan 1928

The Effect Of Lecithin In Dairy Products Upon Butter Fat Determination, O. W. Chapman

Proceedings of the Iowa Academy of Science

The amount of lecithin present in the ether extract of milk, cream, skimmed milk, and buttermilk is determined, and shown to be present in large enough amounts to have considerable influence upon the fat tests of substances which are low in fat. Lecithin prepared from egg yolks and added to buttermilk is shown to give high results in fat determinations, thus showing that the lecithin present in milk is a factor to be considered. The amount of lecithin in buttermilk is great enough to reduce the apparent average fat content of buttermilk from 0.7 per cent to 0.57 …

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Uncomfortable Relations Of Bethany Limestones, Charles Keyes Jan 1928

Uncomfortable Relations Of Bethany Limestones, Charles Keyes

Proceedings of the Iowa Academy of Science

In the general section of the coal measures of Iowa, Missouri and Kansas there are two unconformities which are really quite notable in our stratigraphy. One of these, the one at the base of coal measures, receives wide consideration from earliest days, albeit its sedimental equivalency and time-expression is little regarded. That there is another unconformity within the Carbonic section, hardly less notable than the first one mentioned, at the base of the Bethany limestones bevelling all the productive coal section is a very much more recent realization.

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Geological Date Of Western Iowa Syncline, Charles Keyes Jan 1928

Geological Date Of Western Iowa Syncline, Charles Keyes

Proceedings of the Iowa Academy of Science

The shallow synclinal disposition of the coal measures of southwestern Iowa is a theme of much past consideration. Of these references that of Van Tuyl is perhaps most categorical and assured in character. He definitely asserts the forming of this syncline while the coal measures were being laid down, and ascribes it to this alleged circumstance that the coal measures of the Western Interior basin and of the Eastern Interior basin are so different.

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A Simplified Deduction Of Maxwell's Distribution Law, Leroy D. Weld Jan 1928

A Simplified Deduction Of Maxwell's Distribution Law, Leroy D. Weld

Proceedings of the Iowa Academy of Science

It is the object of this paper, not to contribute to the volume of evidence for the validity of Maxwell's molecular velocity law, or to improve upon the cogency of the various lines of argument which have previously led to it; but rather to bring the deduction within easy reach of any student of integral calculus who has knowledge of the merest rudiments of the theory of errors.

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Cooling By Evaporization In Moving Air, Roy A. Nelson Jan 1928

Cooling By Evaporization In Moving Air, Roy A. Nelson

Proceedings of the Iowa Academy of Science

There is present no satisfactory theory for the wet and dry bulb hygrometer in moving air and these experiments were started with idea of getting more information about the effect of the rate of evaporation and the shape of the covered bulb on the lowering of temperature. So far in this investigation only the cylindrical shape has been used. Only a section of the cylinder is covered with moistened muslin and with constant air velocity and humidity, the rates of cooling are compared when the covered section makes different angles with the air stream.

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