ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Cambridge University Press  (13)
  • 1980-1984
  • 1940-1944  (13)
  • 1942  (8)
  • 1941  (5)
  • 1
    facet.materialart.
    Unknown
    Experiments on growing sugar beet under continuous illumination (1942)
    Cambridge University Press
    Details
    Publication Date: 1942-01-01
    Description: 1. Growing young sugar-beet plants under continuous illumination before transplanting into the field induced stem elongation and anthesis in considerably greater proportions than in plants not exposed to continuous light exposure.2. The technique of growing young plants under continuous light exposure during the winter offers a means of rapid multiplication of small seed stocks, and also of isolating the various physiological types comprising the population. In particular, the technique should make it possible to select types resistant to bolting.3. Analysis of the glomerule populations obtained from the plants showing anthesis at definite dates indicates that there is a definite trend in the proportions of large, medium and small glomerules as the season progresses.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Cambridge University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Experiments on cutting potato tubers (1942)
    Cambridge University Press
    Details
    Publication Date: 1942-04-01
    Description: 1. Field experiments on the use of cut ware setts with the potato varieties Arran Banner, King Edward and Majestic have shown that with proper handling no loss in plant establishment need result. When the cut setts are planted at the same distances as whole setts, there is liable to be a reduction in the yield per acre because of the lower yield per plant, but the actual rate of increase may be increased considerably by cutting because of the larger number of plants obtainable.2. No benefit has been found from the practice of dusting the cut surfaces of tubers of Majestic with slag, lime or ashes, while adverse effects resulted from the use of a fungicide and alum.3. The exposure of cut setts to drying conditions lowers their resistance to attacks by micro-organisms, and encourages the breakdown of the tuber flesh by bacteria of the carotovorum group.4. In general, the use of certain fungicides, either directly on the cut surface, or as a means of moistening sack coverings, is not to be recommended because of the adverse effects of the fungicide on the natural resistance of the live tissue of the tuber flesh.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Cambridge University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Influence of changes in level of feeding on milk production (1942)
    Cambridge University Press
    Details
    Publication Date: 1942-10-01
    Description: The influence upon milk production of changes in level of feeding and in proportion of bulky foods has been investigated, using all available experimental material.The experimental results show that increases in level of feeding, to rates well in excess of conventional English standards, are capable of giving substantial increases in milk production (Fig. 1).It is shown that physiological efficiency falls off as food intake is increased. A curve representing physiological efficiency has been constructed by taking account of changes in live weight as well as changes in yield of milk (Fig. 4).
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Cambridge University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    The Vitamin D3 requirement of pullet chicks: the relative values of genuine and a sample of controlled cod-liver oil in feeding poultry up to the age of 16 weeks (1941)
    Cambridge University Press
    Details
    Publication Date: 1941-01-01
    Description: Calcification on 1% of controlled cod-liver oil was less satisfactory than on 1% of genuine cod-liver oil as judged by radiography at 5 weeks old. Growth rates were not significantly different.⅔ of 1% of the genuine cod-liver oil promoted calcification as satisfactorily as (and significantly better on one diet than) 1% of controlled oil. The mean tarso-metatarsal distances on ⅔ of 1% of controlled oil were too wide for the calcification to be regarded as normal. It has thus been shown that satisfactory growth is no criteria of adequate calcification and bone structure.From the age of 6—16 weeks, ⅔ of 1% of controlled cod-liver oil mixture was not adequate, as demonstrated by radiographic examination, for optimal calcification; but using the criteria of naked eye examination and weight, no significant difference would have been found between genuine cod-liver oil and the controlled mixture. These birds showing subnormal calcification could not be expected to stand up well to the strain of laying, which puts heavy demands upon the calcium metabolism.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Cambridge University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    The inheritance of rachilla length in barley (1941)
    Cambridge University Press
    Details
    Publication Date: 1941-04-01
    Description: 1. A study of the length of the rachilla in barley shows that it is a varietal character, although strongly affected by environmental factors.2. Rachilla length as a varietal character is affected by the density of the ear and the type of hairs or bristles borne on the rachilla.3. In six-row barleys the length of the rachilla of the lateral spikelet is greater than that of the corresponding median spikelet.4. In the absence of any of the complicating factors mentioned above, rachilla length is inherited as a straightforward quantitative character with an intermediate F1 and no signs of segregation in the F2. The number of major factors when the extremes of length are hybridized appears to be in the neighbourhood of four.5. Hybridization of “Archer” and “Chevallier” type parents has given “dominance” of length and a possible heterotic effect. Long rachilla in these crosses appears to be linked with the “Chevallier” rachilla type.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Cambridge University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Plywood Huts (1942)
    Cambridge University Press
    Details
    Publication Date: 1942-01-01
    Print ISSN: 0032-2474
    Electronic ISSN: 1475-3057
    Topics: Ethnic Sciences , Geography
    Published by Cambridge University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    Notes on a General Purpose Boat for use in Polar Regions (1941)
    Cambridge University Press
    Details
    Publication Date: 1941-07-01
    Description: Few will dispute the fact that some type of boat for work in polar regions is an important requirement for all who live or travel there. As a corollary I think that few will agree about the exact type required. The reason for this is that the various regions of both Arctic and Antarctic differ widely, and it would be a mistake to suppose that the same set of conditions applies to all the coasts of the polar regions. With a view to provoking interest in this very absorbing subject, the following article describes a boat which was built in the Antarctic by the British Graham Land Expedition and was designed with the knowledge we had of that coast. Whether or not this boat would be suitable in other areas is better decided by those who may have a more varied knowledge of the Arctic and Antarctic foreshores and of travelling across sea ice.
    Print ISSN: 0032-2474
    Electronic ISSN: 1475-3057
    Topics: Ethnic Sciences , Geography
    Published by Cambridge University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    Age Determination of Carboniferous Basic Rocks of Shropshire and Colonsay (1941)
    Cambridge University Press
    Details
    Publication Date: 1941-02-01
    Description: The helium method of determining the ages of fine-grained basic igneous rocks has now been so far developed as to be applicable to various geological and petrological problems, particularly where geological periods are involved, as in the problem here discussed. For details of the history of this development up to the beginning of 1937 reference may be made to Holmes, 1931; Urry, 1933; Lane and Urry, 1935; Urry, 1936 (b); Holmes and Paneth, 1936; and Holmes, 1937. During 1937 it was found that many of the helium-ratios on which the ‘helium’ time-scale had been based were too high, because of a previously unsuspected error in radium determination due to reliance having being placed on a radium standard which was seriously at fault. To clear up this embarrassing situation an immediate effort was made by several investigators in collaboration, and the first fruits of their work have recently become available (Evans, Goodman, Keevil, Lane, and Urry, 1939).
    Print ISSN: 0016-7568
    Electronic ISSN: 1469-5081
    Topics: Geosciences
    Published by Cambridge University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 9
    facet.materialart.
    Unknown
    On Permian and Triassic Tetrapods (1942)
    Cambridge University Press
    Details
    Publication Date: 1942-04-01
    Description: During the past few months some papers on early amphibia and reptiles have reached me from America, Russia, and China. These have afforded me much pleasure as a change from my present unaccustomed work, and I therefore feel that I can usefully express my thanks to their authors by writing a criticai summary of their conclusions. And such a review is justified because collectively these papers add very greatly to our knowledge and understanding of the evolution of early Tetrapods. Reference will be made to a list of these papers at the end of this review. It is most convenient and logical to discuss firstly the individual animais and then their distribution in time.
    Print ISSN: 0016-7568
    Electronic ISSN: 1469-5081
    Topics: Geosciences
    Published by Cambridge University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Construction of Perspective Drawings from Contoured Maps by means of a Camera Lucida (1942)
    Cambridge University Press
    Details
    Publication Date: 1942-04-01
    Description: Several combined link and slide devices have been described, by means of which block diagrams can be constructed from contoured maps (1, 2). Briefly, their mode of use is as follows: (a) On tracing a contour with the tracing point of the mechanical device, the drawing pencil reproduces the contour as its isometric projection, i.e. distances along the supposed line of sight are reduced relative to distances measured at right-angles to this direction, the reduction factor being determined by the angle at which the area is assumed to be viewed. (b) Before drawing the isometric projection of the next lower contour, the sheet of paper on which the diagram is being made is moved relative to the map in a direction depend-ing on the type of device by a distance which depends on the scale of the map, the contour interval, the angle at which the area is viewed, and any factor of vertical scale magnification relative to the horizontal scale which is deemed necessary to bring out the topography (2). Each successive contour is treated in this manner, preferably starting with the highest contour and finishing with the lowest. In drawing the isometric projections of the contours, such parts are omitted as their inter-sections with the higher contour projections show to be obscured by the intervention of high topography between them and the point from which the area is viewed. (c) Finally hill sky-lines are filled in, roads, rivers, etc, are drawn by sketching between the points where they have been marked as crossing contours in dealing with each contour, and such artistic additions are made as will enhance the impression of relief.
    Print ISSN: 0016-7568
    Electronic ISSN: 1469-5081
    Topics: Geosciences
    Published by Cambridge University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...