scholarly journals V.—On Linnarsson's Recent Discoveries in Swedish Geology

1880 ◽  
Vol 7 (1) ◽  
pp. 29-37 ◽  
Author(s):  
Chas. Lapworth
Keyword(s):  
Geological Survey ◽  
Present Communication ◽  
The Third

In the present communication I propose to direct the attention of British Geologists to three most valuable memoirs recently published by Mr. G. Linnarsson, the eminent palæontologist of the Geological Survey of Sweden; and at the same time to point out, as briefly as may be, what appears to me to be their special bearing upon certain tentative or disputed points in British Geology. They treat of subjects of great interest to the student of the palæontogeology of the Lower Palæeozoic or Proterozoic Rocks; but are printed in the Swedish language, with which, unfortunately, few amongst us are familiar. The first two papers deal with the Graptolite-bearing rocks of Sweden; the third treats of the peculiar fauna of a recently-detected horizon in the prolific Paradoxidian or Primordial Zone.

scholarly journals The thermal and electrical conductivity of a single crystal of aluminium

1927 ◽  
Vol 115 (770) ◽  
pp. 236-241 ◽  
Keyword(s):  
Electrical Conductivity ◽  
Single Crystals ◽  
Test Specimen ◽  
Average Diameter ◽  
National Physical Laboratory ◽  
Present Communication ◽  
Uniform Size ◽  
The Third ◽  
Physical Laboratory

The recent work of Carpenter and Elam on the growth of single crystals of large dimensions has rendered possible the study of the physical constants of single crystals of the commoner metals, and the present communication describes the determination of the thermal and electrical conductivity of aluminium in the form of an isolated crystal. The form of the crystal investigated is shown in fig. 1. This crystal had been prepared at the National Physical Laboratory employing the technique described by Carpenter in “Nature,” p. 266, August 21, 1926, which briefly is as follows:— The test specimen is machined and subjected to three treatments, thermal, mechanical, and thermal. The first treatment is necessary to soften the metal completely and produce new equiaxed crystals of so far as possible uniform size, the average diameter being 1/150 inch. The second consists in straining these crystals to the required amount, and the third in heating the strained crystals to the requisite temperature, so that the potentiality of growth conferred by strain could be brought fully into operation.

scholarly journals XII.—Ice-Erosion in the Cuillin Hills, Skye

1905 ◽  
Vol 40 (2) ◽  
pp. 221-252 ◽  
Author(s):  
Alfred Harker
Keyword(s):  
Geological Survey ◽  
Dominant Factor ◽  
Glacial History ◽  
Present Communication ◽  
Glacial Erosion ◽  
Present Contribution ◽  
History Of

Since the publication in 1840 of a brief but valuable memoir by J. D. Forbes, in which that author drew attention to “the traces of ancient glaciers” in the Cuillin Hills, that district has remained almost unnoticed by glacial geologists for half a century. This neglect is doubtless attributable chiefly to the difficulty of access to the mountains, a consequence of their peculiar configuration, which in turn is closely bound up with the glacial history of the district. The present contribution is the outcome of observations made during the years 1895–1900 in mapping the central part of Skye for the Geological Survey of Scotland. In traversing the mountains day after day throughout several successive seasons, the writer has been struck especially by the impressive evidence which they present of glacial erosion as the dominant factor in their sculpture, and to enforce this is the chief object of the present communication.

scholarly journals Excavations at Northton, Isle of Harris By Derek D.A. Simpson, Eileen M. Murphy and Richard A. Gregory. Pp. 282. Black and white illustrations. ISBN 1 84171 936 6 Oxford: BAR British Series 408. 2006. £38 (pb). ann macsween

2006 ◽  
Vol 28 (2) ◽  
pp. 157-159
Author(s):  
Ann MacSween
Keyword(s):  
Iron Age ◽  
Preliminary Report ◽  
Geological Survey ◽  
Black And White ◽  
The Third ◽  
The University ◽  
Important Site

The site of Northton in Harris is known to most of those familiar with Scottish prehistory for the excavations which produced Scotland's largest domestic assemblage of Beaker pottery. This often-quoted fact, along with previous glimpses of what publication of the 1965–6 excavations would offer, such as those in the excavator's preliminary report in Settlement and Economy in the Third and Second Millennia BC ( Simpson 1976 ), has had many eagerly awaiting the publication of this important site. The site was discovered in 1963 by James McEwen of Aberdeen University, and rescue excavations were undertaken by Derek Simpson of the University of Leicester a couple of years later. Excavations revealed a multi-period site which could be divided into two Neolithic, two Beaker and two Iron Age/Historic phases. The Northton project was one of the first multi-disciplinary studies in the Western Isles with the excavation complemented by topographic and geological survey, and palaeoenvironmental analysis.

Etude du parasitisme des simulies (Diptera : Simuliidae) par des Mermithidae (Nematoda) en Afrique de l'ouest. IV : Description de Isomermis lairdi, n.sp., parasite de Simulium damnosum

1977 ◽  
Vol 55 (12) ◽  
pp. 2011-2017 ◽  
Author(s):  
B. Mondet ◽  
G. O. Poinar Jr. ◽  
J. Bernadou
Keyword(s):  
New Species ◽  
West Africa ◽  
Ivory Coast ◽  
Present Communication ◽  
Body Width ◽  
Spicule Length ◽  
The Third ◽  
Simulium Damnosum ◽  
Mermithid Nematode ◽  
A New Species

The present communication describes a new species of mermithid nematode, Isomermis lairdi, found parasitizing blackflies in the Ivory Coast, West Africa. This nematode is the most common mermithid parasite of Simulium damnosum Theobald and occurs in the larval, pupal, and adult stages of this blackfly in streams of various sizes. The diagnostic characters of the adults of I. lairdi are (1) terminal mouth. (2) strongly S-shaped vagina, (3) ratio of spicule length to anal body width (1.7–2.8), and (4) circular amphids and amphidial openings.The postparasitic juveniles of I. lairdi differ from those of I. tansaniensis Rubtsov, 1972, in having three or four rows of cells in the lateral cords and a longer tail appendage in the male.This is the third species of mermithid nematode described from blackflies (including Simulium damnosum) in West Africa, and the first of the genus.

scholarly journals III. The croonian lecture. - On the discovery, morphology, and environment of Sinanthropus pekinensis

1934 ◽  
Vol 223 (494-508) ◽  
pp. 57-120 ◽  
Keyword(s):  
Subject Matter ◽  
Research Laboratory ◽  
Geological Survey ◽  
Present Stage ◽  
Present Communication ◽  
Geological Society ◽  
The Subject

During the interval which has elapsed since the subject-matter of this paper was presented in lecture form, a memoir has been completed by the Cenozoic Research Laboratory of the Geological Survey of China, on the subject of “ Fossil Man in China ” and ancillary problems of Cenozoic research in that area (Black and others, 1933). By reason of this fortunate circumstance it has become possible to incorporate in the present communication a resume of the chief geological, palaeontological, and archaeological conclusions to which we have been led as a result of the completion to its present stage of that wider study. It is a pleasure to acknowledge here my indebtedness to my friends and colleagues of the staff of the Cenozoic Research Laboratory, without whose cordial co-operation and assistance the present paper could not have been written. To my friends Dr. V. K. Ting, Honorary Director of Cenozoic Research in China, and Dr. Wong Wen Hao, Director of the Geological Survey of China, I wish also to express again my most hearty thanks for their unfailing help and support throughout the whole course of my work in China. I wish further to thank Dr. Wong for permission to use here, in modified form, a number of illustrations which have appeared earlier in publications either of the Geological Survey, or of the Geological Society, of China. The general physiography and location of the Choukoutien area is admirably illustrated in Professor G. B. Barbour’s two block diagrams, figs. 1 and 2, and in the three field sketches by the same artist of the immediate Choukoutien terrain, here reproduced in fig. 3. I am much indebted to Professor Barbour for his kindness in preparing and permitting me to use these instructive and artistic illustrations.

scholarly journals The theory of metallic corrosion in the light of quantitative measurements

1927 ◽  
Vol 116 (774) ◽  
pp. 425-467 ◽  
Keyword(s):  
Relative Importance ◽  
Improved Method ◽  
Salt Solutions ◽  
Present Communication ◽  
Technical Problems ◽  
The Third ◽  
Quantitative Measurements ◽  
Number Of Factors ◽  
Metallic Corrosion

The principal object of the present research is the discovery of a satisfactory way of measuring the corrosion of metals in water and dilute salt solutions, and the use of it to test the adequacy of the newer electrochemical theory of corrosion as applied to such media. The theory suggests that a large number of factors can influence the rate of corrosion, but does not indicate quantita­tively their relative importance in given conditions, in fact, the theory is based at present upon qualitative or only roughly quantitative measurements. It is desirable, therefore, that a determined attempt should be made to place it upon a sounder basis, on account, both of the inherent interest of the theory and of its importance in technical problems of steadily increasing insistence. The present communication is the first portion of an extensive research; it is divided into three sections, the first gives an outline of the theory as understood by the authors; the second, a brief review of the kind of measurement upon which it rests; the third an improved method of measuring corrosion as applied to the metal zinc, together with an interpretation of the results so far obtained.

Lode Dependences for Isotropic Pressure-Sensitive Elastoplastic Materials

1990 ◽  
Vol 57 (3) ◽  
pp. 498-506 ◽  
Author(s):  
J. P. Bardet
Keyword(s):  
Experimental Investigations ◽  
Present Communication ◽  
Modified Model ◽  
True Triaxial ◽  
The Third ◽  
Pressure Sensitive ◽  
Isotropic Pressure ◽  
Elastoplastic Materials ◽  
Lode Angle ◽  
Stress Invariant

Experimental investigations indicate that the third stress invariant; Lode angle α affects significantly the behavior of pressure sensitive materials. The present communication presents a formulation to account for α in isotropic pressure-sensitive elastoplastic materials. Seven Lode dependences are reviewed. A new one, referred to as LMN, in proposed to generalize Lade and Duncan, and Matsuoka and Nakai failure surfaces. The formulation is general enough to introduce α into the isotropic elastoplastic modes which are only developed in terms of first and second-stress invariants. As an illustration, several Lode dependences are introduced into Roscoe and Burland model. The performance of the modified model is estimated by comparing experimental and analytical results in the case of true triaxial loadings on normally consolidated clay.

Photogrammetric Investigation of Byrd Glacier Surface Lowering (Abstract only)

1982 ◽  
Vol 3 ◽  
pp. 353 ◽  
Author(s):  
Henry H. Brecher
Keyword(s):  
Coordinate System ◽  
Fixed Points ◽  
Aerial Photography ◽  
Geological Survey ◽  
Topographic Maps ◽  
Independent Data ◽  
Glacier Surface ◽  
The Third ◽  
Common Coordinate System ◽  
Ground Survey

While carrying out photogrammetric measurements to provide surface velocities and elevations for use in studies of the equilibrium and dynamics of Byrd Glacier, I noted that comparison of elevations obtained by ground surveys in 1978-79 with US Geological Survey topographic maps made from 1960-62 aerial photography indicated a very large apparent lowering of the glacier surface in this short timeinterval. The apparent lowering varied between 50 and 150 m along a 60 km section of the glacier for which data were available (Brecher 1980). The ground measurements were estimated to be in error by no more than 3 in but the accuracy of elevations on the maps was unknown. Because these are reconnaissance maps, however, substantial errors would not be unexpected. It was therefore necessary to obtain more accurate glacier surface elevations for 1960–62 in order to determine whether the lowering is real. Photogrammetric strip triangulations of three individual strips of photography, two taken in November 1960 and the third in February 1963, which cover the region of the greatest apparent lowering, have now been completed. The old strips were oriented to fixed points on the two “banks” of the glacier derived for this purpose from the 1978–79 photogrammetric work, thus bringing the measurements from the old and new photography into a common coordinate system. The glacier surface elevations for 1960–62 are the same as those obtained from the 1978–79 ground survey and photogrammetry. While it is difficult to give measures of accuracy of the results since no independent data are available for comparison, internal evidence indicates that precision higher than the expected 10 m has been achieved in the measurements. It can thus be stated unambiguously that no detectable surface lowering has occurred on any of the parts of the glacier which have been investigated.

Colophon, contents, preface

1999 ◽  
pp. 1-5
Author(s):  
Feiko Kalsbeek
Keyword(s):  
Geological Survey ◽  
Hydrocarbon Potential ◽  
Original Series ◽  
West Greenland ◽  
Precambrian Geology ◽  
The Third ◽  
Greenland Basin

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Kalsbeek, F. (1999). Colophon, contents, preface. Geology of Greenland Survey Bulletin, 181, 1-5. https://doi.org/10.34194/ggub.v181.5107 _______________ Between 1988 and 1992 the Geological Survey of Greenland (GGU) launched a number of expeditions to the Disko Bugt region in central West Greenland (Fig. 1), the ‘Disko Bugt Project’ (Kalsbeek 1989, 1990; Kalsbeek & Christiansen 1992; Christiansen 1993). The aim of this project was threefold. Firstly, it was important to enhance the general geological knowledge of the region, especially the eastern (Precambrian) parts being rather poorly known. Secondly, reconnaissance studies by Kryolitselskabet Øresund A/S in the 1970s and early 1980s and follow up investigations by GGU had revealed mineral showings with Cu, Zn, Au and Ag, which required further investigation. The third major aim of the Project was to obtain more information on the development of the onshore part of the late Phanerozoic West Greenland Basin, which is particularly relevant to the hydrocarbon potential of the basin. This volume reports on the Precambrian geology of the region. 

Greenland, Denmark and the Faeroe Islands, and the national geological survey (GEUS): 1996, a year of transition for publications

1997 ◽  
pp. 9-16
Author(s):  
Peter R. Dawes
Keyword(s):  
50Th Anniversary ◽  
Geological Survey ◽  
100Th Birthday ◽  
Original Series ◽  
The Third ◽  
The Everyday

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Dawes, P. R. (1997). Greenland, Denmark and the Faeroe Islands, and the national geological survey (GEUS): 1996, a year of transition for publications. Geology of Greenland Survey Bulletin, 176, 9-16. https://doi.org/10.34194/ggub.v176.5054 _______________ The former Geological Survey of Greenland (Grønlands Geologiske Undersøgelse: GGU) was to have celebrated its 50th anniversary in 1996. The ministerial reorganisation and the establishment of a Ministry of Environment and Energy led directly to the merger in 1995 of GGU with its much older relative, the Geological Survey of Denmark (Danmarks Geologiske Undersøgelse: DGU). This larger institution, also with headquarters in Copenhagen, but with roots going back to the last century, had already celebrated its 100th birthday in 1988. DGU, as well as serving the sovereign country Denmark, had also a governmental mandate to serve the third country of the Kingdom of Denmark, the Faeroe Islands. As reported in last year’s Report of Activities, the fusion of these two well-known Danish institutions produced a new national geological survey with a staff of about 360, viz. the Geological Survey of Denmark and Greenland (Ghisler, 1996). The official name of the Survey is Danmarks og Grønlands Geologiske Undersøgelse; it is known increasingly within the Survey and nationally − and we hope in time internationally − by the everyday nickname GEUS, derived from the Danish name for a geological survey i.e. Geologisk Undersøgelse.

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