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Articles 42481 - 42510 of 43067
Full-Text Articles in Physical Sciences and Mathematics
Report On Some Iron And Nickel Minerals From The Soapstone Deposits Of Saline County, Arkansas, Phillip Wicklein, Alden B. Carpenter
Report On Some Iron And Nickel Minerals From The Soapstone Deposits Of Saline County, Arkansas, Phillip Wicklein, Alden B. Carpenter
Journal of the Arkansas Academy of Science
No abstract provided.
Structural And Petrological Note On The Mazarn Synclinorium, Larry J. Lee
Structural And Petrological Note On The Mazarn Synclinorium, Larry J. Lee
Journal of the Arkansas Academy of Science
No abstract provided.
Shale-Limestone Alteration In The Upper Portion Of The Fayetteville Formation Near Marshall, Arkansas, W. Bruce Saunders
Shale-Limestone Alteration In The Upper Portion Of The Fayetteville Formation Near Marshall, Arkansas, W. Bruce Saunders
Journal of the Arkansas Academy of Science
No abstract provided.
Paleozoic Analogues Of Recent Carbonates, Tom Freeman
Paleozoic Analogues Of Recent Carbonates, Tom Freeman
Journal of the Arkansas Academy of Science
No abstract provided.
Specialized Weather Information For Arkansas Agriculture, Donald A. Downey
Specialized Weather Information For Arkansas Agriculture, Donald A. Downey
Journal of the Arkansas Academy of Science
No abstract provided.
Precambrian Geology In Humboldt Township, Marquette County, Michigan, Peter D. Rowley
Precambrian Geology In Humboldt Township, Marquette County, Michigan, Peter D. Rowley
Journal of the Minnesota Academy of Science
ABSTRACT-The present study involved investigation of gneissic granite, migmatite, basic dikes, and faults in part of the Southern Complex of Michig.an. The average strike of the foliation of the gneissic granite based upon the orientation of feldspar phenocrysts is N. 60° w·;, the strike of the major dike set is between N. 30° W. and N. 60° W., the average strike of the fault zones-is N. 52° W., and a two-mile long body of migmatite trends about N. 57° W. The known history starts in the early Precambrian, when gneissic granite was emplaced and formed migmatites by incorporation of wall-rock …
A Philosopher Looks At Political Science, John J. Neumaier
A Philosopher Looks At Political Science, John J. Neumaier
Journal of the Minnesota Academy of Science
No abstract provided.
Marine Geology, Preston E. Cloud Jr.
Marine Geology, Preston E. Cloud Jr.
Journal of the Minnesota Academy of Science
Were the average temperature of the earth a few tens of degrees less than it is, ice would be the most common crustal rock. The fact that it occurs in its liquid phase over 71 per cent of the earth's surface should not obscure the fact that the oceans are geologic features, particularly in their substructure, their boundary relations, and their history.
Kimberley Research Station Progress Report, 1964 : Soil Fertility And Plant Nutrition, D B. Parbery, R. Wetselaar
Kimberley Research Station Progress Report, 1964 : Soil Fertility And Plant Nutrition, D B. Parbery, R. Wetselaar
Journal of the Department of Agriculture, Western Australia, Series 4
BEFORE 1963, very little work, other than that described in Burvill's original report, had been done on the analysis of Ord soils, nor had their fertility status been clearly defined.
Contour Planting For Hillside Orchards. Part 1, N H. Shorter
Contour Planting For Hillside Orchards. Part 1, N H. Shorter
Journal of the Department of Agriculture, Western Australia, Series 4
FRUIT growers intending to plant an orchard on sloping land, would be well advised to consider the suitability of the block for planting on a contour system.
Leaf Scorch Of Apple Trees, N H. Shorter
Leaf Scorch Of Apple Trees, N H. Shorter
Journal of the Department of Agriculture, Western Australia, Series 4
BEFORE the 1964-65 fruit season, sections of a number of orchards in the Donnybrook district were converted to systems of permanent overhead sprinkler irrigation.
In several cases, however, leaf scorch occurred where these overhead sprinklers were used during the day time.
The Starling, John L. Long
The Starling, John L. Long
Journal of the Department of Agriculture, Western Australia, Series 4
Despite their pretty colour and their song, starlings cannot be considered beneficial, especially in the fruit and grain-growing areas of W.A. where they are declared vermin.
MILLIONS of starlings inhabit the settled parts of eastern and south-eastern Australia, but so far they have not reached Western Australia.
Kimberley Research Station Progress Report, 1964 : Climate, Jan Jerzy Basinski, E. A. Fitzpatrick, W. R. Stern
Kimberley Research Station Progress Report, 1964 : Climate, Jan Jerzy Basinski, E. A. Fitzpatrick, W. R. Stern
Journal of the Department of Agriculture, Western Australia, Series 4
A review of recent research in climate, soils, tropical crops and pastures, weeds, insect pests and cattle husbandry at the Kimberley Research Station.
EXTENSIVE climatic data are recorded at the Station and analysed in relation to crop performance, irrigation requirements, and farm management practices.
Contribution À L'Étude De La Biologie D'Asellus Cavaticus Leydig (Note Préliminaire), Jean-Paul Henry
Contribution À L'Étude De La Biologie D'Asellus Cavaticus Leydig (Note Préliminaire), Jean-Paul Henry
International Journal of Speleology
The cavernicole asellid Asellus cavaticus Leydig has been reared in our laboratory for more than twenty months, permitting us to give some data on the sexual cycle of this species. Females provided with brood pouches seem to be more numerous in the spring, as is the case with the subterranean amphipod Niphargus virei Chevreux. The average length of the incubation period seems much shorter than that of other troglobitic species such as Niphargus virei Chevreux or Caecosphaeroma burgundum Dollfus, so that the life cycle of our species is nearer to that of epigean Asellus. The number of young per …
Contribution À L'Étude De Certains Lithobiidae (Chilopoda) Des Grottes De Roumanie, Stefan Negrea
Contribution À L'Étude De Certains Lithobiidae (Chilopoda) Des Grottes De Roumanie, Stefan Negrea
International Journal of Speleology
This paper comprises the ecological and zoogeographical data of 21 systematic units of Lithobiidae coming from 100 Romanian caves (Transylvania, Banat, Oltenie and Dobroudja). Initially the author describes in a summarising way the provenance of the studied material, after which he exposes for every species the results of observations carried out by several authors and by himself. Finally he formulates the conclusions concerning ecology and biogeography resulting from his observations. These data are summarised in a synoptic table in which three species can be considered troglobionts, two of which are blind; these are Harpolithobius oltenicus Negrea; Lithobius decapolitus Matic, Negrea …
Recherches Phréatobiologiques Ii: La Capture Des Niphargus Adultes Par Le Procéde Des Sondages Karaman-Chappuis. Les Crues Et La Biocenose De La Nappe Phréatique, Constantin Motas, Eugène Serban
Recherches Phréatobiologiques Ii: La Capture Des Niphargus Adultes Par Le Procéde Des Sondages Karaman-Chappuis. Les Crues Et La Biocenose De La Nappe Phréatique, Constantin Motas, Eugène Serban
International Journal of Speleology
The present note calls into question the opinion of different authors concerning the presence or lack of adult Niphargus near the phreatic table (superior layer of phreatic water) in zones prospected by Karaman-Chappuis method. Our investigations have proved the reason for which Niphargus adults were less frequent in the superior layer of the phreatic water is rather concerned with our investigation means - which are very approximate - than with the ecological or ethological requirements of these animals. The assertion that the phreatic fauna performs downward migrations during the floods must be considered as doubtful. During floods it is impossible …
Subterranean Occurrence Of Anaspides Tasmaniae (Thomson) (Crustacea, Syncarida), W. D. Williams
Subterranean Occurrence Of Anaspides Tasmaniae (Thomson) (Crustacea, Syncarida), W. D. Williams
International Journal of Speleology
Anaspides tasmaniae is recorded from a subterranean habitat for the first time. The only difference noted from surface forms was the smaller amount of pigment present.
Die Vertreter Der Gattung Spelaeodiscus Brusina 1886 (Gastropoda, Pulmonata) In Jugoslawien, Jože Bole
Die Vertreter Der Gattung Spelaeodiscus Brusina 1886 (Gastropoda, Pulmonata) In Jugoslawien, Jože Bole
International Journal of Speleology
In Yugoslavia there are 5 species of the Genus Spelaeodiscus (Gastropoda, Pulmonata): Sp. hauffeni (F. Schmidt), Sp. triaria (Rossmàssler), Sp. albanicus (A. J. Wagner), Sp. unidentatus Bole and Sp. obodensis sp. n., decribed here. The anatomical researches on Sp. hauffeni (F. Schmidt) and Sp. unidentatus Bole have proved that they belong to the family of the Pupillidae and not to the one of the Valloniidae. This fact confirms the opinion of Hudec, according to whom the genus Spelaeodiscus belongs to the family of the Pupillidae.
Laboratory And Field Evidence For A Vadose Origin Of Foibe (Domepits), Max W. Reams
Laboratory And Field Evidence For A Vadose Origin Of Foibe (Domepits), Max W. Reams
International Journal of Speleology
Foiba (plural, foibe) is a term derived from the northeastern Italian karst region. The word is here suggested for use in preference to other terms referring to vertical cavities in soluble rocks. Foiba is defined as a cavity in relatively soluble rock which is natural, solutional, tends toward a cylindrical shape, and possesses walls which normally approach verticality. In laboratory experiments, limestone blocks were treated with dilute hydrochloric acid, and cavities resembling foibe were produced. Vertical walls developed only when a less soluble layer capped the limestone block or when the acid source was stationary, allowing acid to drip to …
Notes Sur Les Coleopteres Cavernicoles De Bulgarie. V. Balcanobius Etropolensis Gen.N.; Sp.N. - Nouveau Bathysciinae Cavernicole Du Groupe Des Brachyscapes (Catopidae, Coleoptera), Vassil B. Gueorguiev
Notes Sur Les Coleopteres Cavernicoles De Bulgarie. V. Balcanobius Etropolensis Gen.N.; Sp.N. - Nouveau Bathysciinae Cavernicole Du Groupe Des Brachyscapes (Catopidae, Coleoptera), Vassil B. Gueorguiev
International Journal of Speleology
Three caves of the central part of the Bulgarian Balkan (Stara planina, close to the village of Etropolé) host cavernicolous beetles of the subfamily Bathysciinae (family of Catopidae) that constitute a new genus of the Brachyscapes group. In this paper the diagnosis of this new troglobe genus together with the description of the type species Balcanobius etropolensis, gen.n., sp.n. are given. The new genus is then inserted in the dichotomic table as defined by R. Jeannel, placing it close to the other two Yugoslavian genus Parapropus and Spelaeodromus.
Beiträge Zur Kenntnis Der Brunnenfauna Im Tal Des Flusses Bela Reca (Rumänien), Constantin Motas, Iosif Capuse
Beiträge Zur Kenntnis Der Brunnenfauna Im Tal Des Flusses Bela Reca (Rumänien), Constantin Motas, Iosif Capuse
International Journal of Speleology
After an introduction, comprising a historical summary on the researches on well fauna, a description of the study area in which 13 water wells have been investigated is given. The authors explain the adopted working method and indicate the physical and chemical characteristics of the waters (temperature, pH, alkalinity, hardness, O2-content, fixed residuum, suspended matter, N2O5, P2O5, NaCl, Ca, Fe). The fauna of the wells of Mehadia (see systematic part) is composed of 34 species: 1 Triclade, 3 Oligochaeta, 2 Gastropods, 5 Cladocera, 1 Ostracod, 3 Copepods, 4 Isopods, 2 …
Report On The Use Of An Ibm 1620 Computer By Carleton College Undergraduates, Donald H. Taranto
Report On The Use Of An Ibm 1620 Computer By Carleton College Undergraduates, Donald H. Taranto
Journal of the Minnesota Academy of Science
There are two primary sources of computer activity among Carleton students: course work and independent study. In many instances we have found that not only has the student learned something about programming and the use of computers from one of these activities, but also a great deal about the subject matter that motivated the computing. In this respect, the computer is an excellent pedagogic device.
In the following outline of our student computer work, I have merely named the computer problems originating in courses but have described more fully some of the work arising from independent study. The 1620 Users …
Metrology--An Experiment Where Industry And Education Meet, R. B. Hastings
Metrology--An Experiment Where Industry And Education Meet, R. B. Hastings
Journal of the Minnesota Academy of Science
This paper describes a project in which students worked in close cooperation with both the physics department of Macalester College and the gage block laboratory of the Continental Machine Company, manufacturers of ,precision gage blocks. Brief descriptions, including drawings, are given of both the interferometer and the constant temperature laboratory in which all measurements were taken. This constant temperature laboratory is set with precision at those two temperatures between which the average coefficient of linear expansion of a gage block is to be determined. Many such readings were taken and computations of the coefficient of expansion were made. Comparison of …
Östliche Gruppe Der Monolistrini (Crust., Isoopoda): Ii.Biologischer Teil, Boris Sket
Östliche Gruppe Der Monolistrini (Crust., Isoopoda): Ii.Biologischer Teil, Boris Sket
International Journal of Speleology
Following the first systematic part, in this paper the author describes the biological observations made on these Isopod Crustaceans of underground waters. The different sexual characters of the particular groups and the related differences in the behaviour before copulation are described. During the embryonic and larval development small differences between sub-genus are reported. To the differences in Caecospaeroma (according to Daum) the first and second “mancastadium” and another “postmanca stadium” with pereiopods VII not wholly formed have to be added. The author describes the growth of the different parts of the corps and the extremities, comprising the sexual characters.
La Présence De Bogidiella Albertimagni Hertzog 1933 En Roumanie Et Quelques Remarques Sur Les Espèces Européennes Du Genre, Dan Dancau, Eugène Serban
La Présence De Bogidiella Albertimagni Hertzog 1933 En Roumanie Et Quelques Remarques Sur Les Espèces Européennes Du Genre, Dan Dancau, Eugène Serban
International Journal of Speleology
Studying several Bogidiella individuals collected from the phreatic biotope of Cerna Valley (Oltenia region) using Karaman-Chappuis method, authors announce the presence of Bogidiella albertimagni Hertzog in Romania. After a description of the studied individuals, the authors talk about some problems concerning the taxonomic value of B. albertimagni and B. skopljensis Karaman (this second species being formerly known in Romania) and the validity of B. denticulata Mestrov described from Yugoslavia.
Preliminary Note On The Algae Of Crystal Cave, Kentucky, J. P. Nagy
Preliminary Note On The Algae Of Crystal Cave, Kentucky, J. P. Nagy
International Journal of Speleology
Collections of a preliminary type carried out in Crystal Cave, Kentucky, resulted in the identification of seven algal taxa. A Chamaesiphon (Dermocarpales) and an Asterocytis (Bangioidea) are reported for the first time from a speleo-environment. As no correlation could be found among the algae occurring in Crystal Cave and those of nearby Mammoth Cave the conclusion is reached that the cave algal floras do not originate from the algal vegetation of the surface but may have gotten into the caves at the time of the latter’s formation.
Algological Investigations In Mammoth Cave, Kentucky, H. J. Jones
Algological Investigations In Mammoth Cave, Kentucky, H. J. Jones
International Journal of Speleology
Algological investigations carried out in the Mammoth Cave, Kentucky, revealed the presence of twenty-seven taxa representing all divisions of the Algae except the Pyrrhophyta and Phaeophyta; diatoms although observed in the samples were not dealt with in the present paper. One species, Oscillitoria clausiana spec. nov. and a form Lyngbya pusilla fa. tenuior fa. nov., both belonging to the Cyanophyta are new to science. In addition, several other rare and interesting algae were found. A comparison is made between the algal flora of the Mammoth Cave and algae found in several European caves. The ecology of the cavernicole algae is …
Karsthydrologische Forschungen In Den Höhlen Ungarns, Hubert Kessler
Karsthydrologische Forschungen In Den Höhlen Ungarns, Hubert Kessler
International Journal of Speleology
Although Hungary does not belong to the large Karst countries, extensive speleologic and karst-hydrologic investigations are carried out. On the one hand, Hungary owns one of the largest stalactite caves in the world, on the other hand the majority of raw materials and the connected industries are linked with Karst regions which pose particular water supply problems. The largest water supplying caves are in the North of Hungary. The best known cave is the Aggtelek cave with a length of 22 km, but there are numerous other, recently disclosed caves of a length of 1-5 km, which were discovered by …
Sur Les Confluences Souterraines, Marcian Bleahu
Sur Les Confluences Souterraines, Marcian Bleahu
International Journal of Speleology
The development of a subterranean drainage system depends on the way in which subterranean confluences between different rivers can be formed. Different from surface, in which confluences are determined by processes related to the surface runoff of water, in subterranean karst confluences have a random pattern and are related to certain circumstances independent of the underground flow. These conditions are: pre-existence of circulation ways and the way they are distributed in space. At these the peculiar processes of subterranean karst flow determined by the flow under pressure, the only one that can explain the systematic appearance of confluences, have to …
Die Pflanzenwelt Der Höhlen Bei Lillafüred, Klara Verseghy
Die Pflanzenwelt Der Höhlen Bei Lillafüred, Klara Verseghy
International Journal of Speleology
The vegetation of the Forràs and Istvàn caves at Lillafured in Hungary is composed of algae, micro- and macrofungi and mosses. The algae in both caves are represented by unicellular Cyanophyta and Chlorophyta with small species numbers. The macrofungi are Coprinus and Polyporacea spp. while it was impossible to identify the microfungi. The moss flora is richly developed and it can be supposed to represent a secondary vegetation at the artificially illuminated places of the caves. In Forràs cave 7, and in Istvàn cave 15 different mosses were found, only 3 of which proved to be common to both caves: …