scholarly journals Notes on the Biology of Tellina tenuis da Costa

Author(s):  
A. G. Stephen

SUMMARYThe present paper deals with the results of investigations into certain phases in the life-history of the bivalve mollusc Tellina tenuis carried out during the autumn of 1926 and 1927.Collections in the intertidal zone and below L.W.M., were made in a number of bays in the Cumbrae and neighbourhood, Kames Bay, Millport, being selected for intensive study.In Kames Bay Tellina tenuis ranges from a little below H.W.M. to depths of about 4 fm. The maximum concentration of about 1000 per sq. m. is found at L.W.M. springs and the numbers decrease to zero at H.W.M. and 4 fm.In Kames Bay the density of Tellina tenuis falls in a progressive manner from L.W.M. to H.W.M.The size-frequency distribution shows a regular gradation from the lower to the higher levels. At L.W.M. and below individuals of small size predominate, while at H.W.M. they are proportionately few.At higher levels growth is more rapid than at the lower levels.The size-frequency curves and density of Tellina tenuis in the other bays at L.W.M. correspond with those of half-tide in Kames Bay.The rate of growth may therefore be influenced by the density of population as well as by the habitat.In all areas the 1926 brood predominates.The Tellina tenuis population in Kames Bay seems to be composed of four year-groups, one of which is almost unrepresented. Collections from neighbouring bays indicate that older groups may be present.The amount of young brood on the bottom seems to vary considerably from year to year, being large and small in alternate years.The two closely related species, T. tenuis and T. fabula, are both plentiful in Kames Bay, but their range is not coincident.Eipe sperms were found from May onwards and ova were rounding off in June.Young Tellina tenuis, passing the 2-mm. sieve but retained by the 1-mm. sieve, were found in Kames Bay in August, chiefly below L.W.M., but in October plentifully distributed up to half-tide and in lesser numbers higher up the shore.The food usually consists of vegetable detritus, but during the spring increase diatoms appear almost exclusively in the gut.

1910 ◽  
Vol 10 (4) ◽  
pp. 602-777 ◽  
Author(s):  
O. H. Peters

The following observations upon the Natural History of Epidemic Diarrhoea were made in Mansfield during the summer and autumn of 1908. The fact that at the time the writer was engaged in preparing a paper—to which the present paper is to some extent complementary—upon the epidemiological relations of season and disease, lent special interest to the enquiries regularly made from the Health Department of this town into the circumstances attending fatal attacks of diarrhoea. Early in the season a more than usually extensive enquiry was made into one of these fatal attacks in an area where an outbreak of diarrhoea appeared to be spreading outwards from a group of old privy-middens. To test how far the condemnation of the latter was justifiable another area was taken on the other side of the town, where the houses were newly built and provided exclusively with water-closets; and records, collected by house-to-house visitation, were obtained of all cases of epidemic diarrhoea, whether non-fatal or otherwise, occurring in these localities. The enquiries thus begun were afterwards extended so as to embrace two fairly large districts, a chance of doing this being provided by the opportune postponement of the addition to the department of certain work of inspection which had been impending at the beginning of the summer. These districts were several times revisited and scattered observations were also made throughout the other parts of the town. During 1909, while there was no opportunity of making extended observations, there were valuable opportunities during the course of the routine inspections of the summer of testing and re-testing the principal results obtained during 1908.


1832 ◽  
Vol 122 ◽  
pp. 539-574 ◽  

I have for some time entertained an opinion, in common with some others who have turned their attention tot he subject, that a good series of observations with a Water-Barometer, accurately constructed, might throw some light upon several important points of physical science: amongst others, upon the tides of the atmosphere; the horary oscillations of the counterpoising column; the ascending and descending rate of its greater oscillations; and the tension of vapour at different atmospheric temperatures. I have sought in vain in various scientific works, and in the Transactions of Philosophical Societies, for the record of any such observations, or for a description of an instrument calculated to afford the required information with anything approaching to precision. In the first volume of the History of the French Academy of Sciences, a cursory reference is made, in the following words, to some experiments of M. Mariotte upon the subject, of which no particulars appear to have been preserved. “Le même M. Mariotte fit aussi à l’observatoire des experiences sur le baromètre ordinaire à mercure comparé au baromètre à eau. Dans l’un le mercure s’eléva à 28 polices, et dans Fautre l’eau fut a 31 pieds Cequi donne le rapport du mercure à l’eau de 13½ à 1.” Histoire de I'Acadérmie, tom. i. p. 234. It also appears that Otto Guricke constructed a philosophical toy for the amusement of himself and friends, upon the principle of the water-barometer; but the column of water probably in this, as in all the other instances which I have met with, was raised by the imperfect rarefaction of the air in the tube above it, or by filling with water a metallic tube, of sufficient length, cemented to a glass one at its upper extremity, and fitted with a stop-cock at each end; so that when full the upper one might be closed and the lower opened, when the water would fall till it afforded an equipoise to the pressure of the atmo­sphere. The imperfections of such an instrument, it is quite clear, would render it totally unfit for the delicate investigations required in the present state of science; as, to render the observations of any value, it is absolutely necessary that the water should be thoroughly purged of air, by boiling, and its insinuation or reabsorption effectually guarded against. I was convinced that the only chance of securing these two necessary ends, was to form the whole length of tube of one piece of glass, and to boil the water in it, as is done with mercury in the common barometer. The practical difficulties which opposed themselves to such a construction long appeared to me insurmount­able; but I at length contrived a plan for the purpose, which, having been honoured with the approval of the late Meteorological Committee of this Society, was ordered to be carried into execution by the President and Council.


2019 ◽  
Vol 1 ◽  
pp. 1-1
Author(s):  
Agnieszka Bień

<p><strong>Abstract.</strong> A cartographic map of Gdańsk in the years of 1918&amp;ndash;1939 was very different from the other maps of Polish cities. The reasons for some differences were, among others, the proximity of the sea, the multicultural mindset of the inhabitants of Gdańsk from that period, and some historical events in the interwar period (the founding of the Free City of Gdańsk and the events preceding World War II). Its uniqueness came from the fact that the city of Gdańsk combined the styles of Prussian and Polish housing, as well as form the fact that its inhabitants felt the need for autonomy from the Second Polish Republic. The city aspired to be politically, socially and economically independent.</p><p>The aim of my presentation is to analyze the cartographic maps of Gdańsk, including the changes that had been made in the years of 1918&amp;ndash;1939. I will also comment on the reasons of those changes, on their socio-historical effects on the city, the whole country and Europe.</p>


Author(s):  
Alexander Murray

People with a logical turn of mind say that the history of the world can be summarised in a sentence. A précis of mediaval historian Richard William Southern's work made in that spirit would identify two characteristics, one housed inside the other, and both quite apart from the question of its quality as a work of art. The first is his sympathy for a particular kind of medieval churchman, a kind who combined deep thought about faith with practical action. This characteristic fits inside another, touching Southern's historical vision as a whole. Its genesis is traceable to those few seconds in his teens when he ‘quarrelled’ with his father about the Renaissance. The intuition that moved him to do so became a historical fides quaerens intellectum. Reflection on Southern's life work leaves us with an example of the service an historian can perform for his contemporary world, as a truer self-perception seeps into the common consciousness by way of a lifetime of teaching and writing, spreading out through the world (all Southern's books were translated into one or more foreign language).


2016 ◽  
Vol 60 (2) ◽  
pp. 385-407 ◽  
Author(s):  
AMBROGIO A. CAIANI

ABSTRACTThe recent bicentennial commemorations of the Napoleonic empire have witnessed a proliferation of new studies. Scholars now possess much more sophisticated conceptual tools than in past decades with which to gauge the problems faced by French imperial administrators throughout Europe. Well-trodden concepts, like centre/periphery or collaboration/resistance, have been reinvigorated by more sophisticated understandings of how rulers and ruled interacted in the early nineteenth century. This article argues that, while much progress has been made in understanding problems of ‘resistance’, there is more to be said about the other side of the same coin, namely: ‘collaboration’. Using the micro/local history of a scandal in Napoleonic Bologna, this article wishes to reaffirm that collaboration was an active agent that shaped, and often shook, the French imperial project. The biggest problem remained that, despite ‘good intentions’, collaborators sometimes simply did not collaborate with each other. After all, imperial clients were determined to benefit from the experience of empire. The centre was often submerged by local petty squabbles. This article will use a specific micro-history in Bologna to highlight the extent to which Napoleonic empire builders had to thread a fine line between the impracticalities of direct control and the dangers of ‘going native’.


2017 ◽  
pp. 115-127
Author(s):  
Jerzy Rotko

The author takes the issue of individual administrative acts aimed at rational use of the environment. He is focused on the German experiences. The rationale for this choice is, on one hand, a considerable number of such instruments, provided especially in the water law. On the other hand it is an significant and extensive literature devoted to such instruments. Special role in the development of doctrine played the work on the code of environmental law, which was the central point of an integrated permit. Although there has been no adoption of the Code, but accumulated experiences influence the theory and practice of application of this law. Proof of this is also a history of Water Resources Act, passed in 2009. The need for the adoption of this Act was the result of the consequences of competence changes made to the constitution. These changes were made in order to allow the adoption of the Code. In the new law types of water permits known from previous regulations were repeated, but also there were added selected solutions for environmental integrated protection. That was modeled on the draft Code. It was also added one kind of permission functioning in legislation of federal states.


Literary Fact ◽  
2021 ◽  
pp. 181-199
Author(s):  
Aleksandra S. Pakhomova

The article analyzes the history of lesser-known literary union “The Sailors of Marseilles” that existed in Petrograd in 1917. Mikhail Kuzmin was the central figure and the most popular writer in this union. Other “sailors” were young poets who wanted to reach out the audience and to get the opportunity for publication. Until now, this union has not been studied in the context of Kuzmin’s oeuvre, literary reputation and author’s strategies. Some conclusions have been made in the process of our research. First of all, Kuzmin’s attitude to literary unions has been specified. As we can see, he considered literary groups as a commonwealth of independent authors exploiting shared writing technics. On the other hand, he did not approve ideological unification within such unions. Denying hierarchy in literary groups, Kuzmin strove to create a literary union on an equal footing. He emphasized the individuality of each “sailor” to create to make it real, but in fact, this union was just adopting Kuzmin’s techniques, i.e., it followed the authoritative model. It should be mentioned, that the organization of the group was also the Kuzmin’s endeavour to assert his literary reputation that was in decline during 1917. Moreover, the whole concept of “The Sailors of Marseilles” was carried in accordance with the nautical symbolics developed by Kuzmin in 1917. The sea was the sign of power and war, and the sailors were the image of fraternity capable to contradict this power. “The Sailors of Marseilles” in the final count can be considered as creative-life Kuzmin’s project.


2019 ◽  
Author(s):  
Sergei Teleshov ◽  
◽  
Elena Teleshova ◽  

It has been 150 years since D.I. Mendeleev formulated the Periodic law and expressed it visually in the form of a table of elements in 1869. As is clearly well known today, Mendeleev’s ideas, confirmed by the discovery of the elements he predicted, turned out to be very promising indeed. However, Mendeleev was not the first, nor the only scientist to have investigated the periodic arrangement of the elements. With this in mind, the present paper seeks to highlight some of the other efforts made in the field during Mendeleev’s lifetime. Keywords: D. Mendeleev, periodic table, table options, history of science.


Archaeologia ◽  
1880 ◽  
Vol 46 (1) ◽  
pp. 65-162 ◽  
Author(s):  
James Fowler

Glass is, in many respects, one of the most remarkable substances in the world. No known substance combines such varied uses with such matchless beauties. For innumerable domestic purposes it has for centuries been considered a necessity of daily life. Without glass innumerable paths in science and the arts would never have been explored; and in these paths progress has been made in proportion as the methods of making glass have been improved. On the other hand the peculiar beauties inherent in or incident to this material are so great that at no period in history has man been able to grasp completely more than one of them at once. The Venetians realized above all others the marvellous capacity of glass for being wrought into all kinds of beautiful forms; our Gothic forefathers developed beyond all others its capabilities in respect of colour; the Phoenicians and Romans did wonders both in form and colour, but were nevertheless inferior to the Venetians in the former, and to our Gothic forefathers in the latter; we, in our day, excel in developing to the utmost (wonderful talent that it is!) the crystalline transparency and brilliancy of glass, but it is in this direction only that we have any true art or artists—in form and colour we do comparatively nothing. Thus, in each instance, the full realization of a period has been but as it were a passing glimpse—it has never been found possible to retain it, so as to carry it into the full realization of another period; even as the highest natural beauty is but for a moment—it increases until maturity, and then immediately begins to fade.


2018 ◽  
Vol 52 (2) ◽  
pp. NP1-NP1

Erbeli, F., Hart, S. A., & Taylor, J. (2018). Genetic and environmental influences on achievement outcomes based on family history of learning disabilities status. Journal of Learning Disabilites. Advance online publication. (Original doi: 10.1177/0022219418775116 ) In the version of this article originally published OnlineFirst, an error was made in the coding of missing data for math fluency. The mistake is limited to the math fluency measure only (a miscode of the data resulted in missing data being set to 0), and is limited to the specific numbers reported for the math achievement measure. The mistake did not result in a change in the pattern, or implications, of the results. Tables 1, 2, 3, and 4, Figure 3, as well as a sentence in the Results section, have been corrected online and in subsequent versions of the article. All the other sections of the paper remain intact. The conclusions continue to be supported by the new data and verifiable analyses. The corrected sentence is as follows: Outcomes on all achievement measures, aside from math fluency, were statistically significant indicators of FH+ status, as shown by the p values.


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