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  • 1
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    The growth, yield and composition of certain tropical fodders (1935)
    Cambridge University Press
    Details
    Publication Date: 1935-07-01
    Description: XII. SummaryThe experiment was designed to compare under Trinidad conditions three varieties of fodder grass and ascertain the correct stage at which each should be cut to give the maximum nutritive value per acre. It consisted of a yield trial in the form of a Latin square in which the treatment series included four cutting rotations on main plots and three varieties of fodder grass on subplots as appended
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Cambridge University Press
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  • 2
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    Experimental methods with cotton: II. A study of the effects of seed rate and time of thinning on the development and yield of cotton plants in hand-planted cotton trials (1939)
    Cambridge University Press
    Details
    Publication Date: 1939-07-01
    Description: The object of this experiment was, in the first place, to see whether, with cotton experiments, there was an advantage in planting a larger number of seeds per hill than the customary number of three; and, in the second place, to see the effect of the interaction of time of thinning with varying numbers of seeds per hill.In cotton breeding work, where trials of new strains have to be carried out as soon as sufficient seed is available, it is important to conserve seed in all possible ways. At the same time it is necessary to plant sufficient seed to give a full and even stand for all strains.In experiments carried out in 1936–7 and 1937–8 stand counts, made soon after germination, showed the advantage of the higher seed rates in obtaining a quick and full stand. Later counts and final counts at harvest showed a considerable evening up, although the two-seed treatment proved unreliable, giving the lowest stand in both seasons.Plant height and weight records, made during both seasons, showed that plants from the larger hills were drawn up much more rapidly than plants from the smaller hills. This rapid elongation in stem height proved, from weight figures, to be at the expense of lateral development, weak and leggy plants being produced in these hills. The ten-seed treatment showed up particularly badly in this respect, the yield figures showing that the plants never recovered from this early deleterious effect.The six-seed treatment, whilst giving a quick and excellent stand suffered to a certain extent from the same defects as the ten-seed treatment. If thinned early they tended to fill out and become more comparable with plants from the three-seed treatment, but when thinning was delayed they never caught up and final yield suffered adversely.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 3
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    Experimental methods with cotton: I. The design of plots for variety trials (1939)
    Cambridge University Press
    Details
    Publication Date: 1939-01-01
    Description: 1. The results of three uniformity trials with a U4 cotton at Barberton are reported. Two of these trials, carried out in a dry year, gave yields in the region of 400 lb. seed cotton per acre; the third, in a wet year, yielded over 1100 lb. per acre.2. Results from the three experiments agreed closely in essential details regarding size and shape of plots.3. In all three cases the percentage standard error per plot decreased rapidly as the plot was lengthened, but tended to increase slightly as the width of the plot was increased.4. The standard error increased as the block size was increased by the addition of more plots, indicating the desirability of keeping the number of strains in a variety trial as low as possible.5. With plots of the same shape the smallest plots were the most efficient, while with plots of the same size the efficiency increased as the plot shape became longer and narrower.6. Two fertility contour maps are given, which illustrate a general patchiness in yield common to cotton crops in the Barberton district.7. Details of the types of plot used at Barberton are given, together with the reasons for their adoption.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 4
    Electronic Resource
    Electronic Resource
    A study in British Trade Union history. Attempts at ‘General Union’ 1829—1834 (1938)
    Cambridge : Cambridge University Press
    International review for social history 4 (1938), S. 359-462 
    Details
    ISSN: 1873-0841
    Source: Cambridge Journals Digital Archives
    Topics: Economics
    Notes: The best-known episode in the early history of Britsh Trade Unionism is the dramatic rise and fall of the Grand National Consolidated Trades Union in 1833—1834. Robert Owen's sudden emergence as the leader of a mass movement reported to number a million adherents, the trial and transportation of the unfortunate ‘Tolpuddle Martyrs’ for the crime of administering unlawful oaths, the presentation of the ‘document’ demanding renunciation of Trade Union membership by masters in many parts of the country, and the complete eclipse of the Grand National within a year of its first foundation, make a story which has been told many times with effect, and does not need telling over again. But though this particular story is well-known, there is a good deal that remains obscure in Trade Union history both during this critical year and, still more, during the few previous years when the idea of an all-embracing ‘General Union of Trades’ was taking hold of one section after another of the British working classes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S1873084100000501
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  • 5
    Electronic Resource
    Electronic Resource
    Some notes on British Trade Unionism in the third Quarter of the nineteenth Century (1937)
    Cambridge : Cambridge University Press
    International review for social history 2 (1937), S. 1-27 
    Details
    ISSN: 1873-0841
    Source: Cambridge Journals Digital Archives
    Topics: Economics
    Notes: The principal purpose of these notes is to correct certain misunderstandings which I believe to be widely prevalent concerning the character of British Trade Unionism during the quarter of a century which followed the establishment in 1850—1851 of the Amalgamated Society of Engineers. The period covered thus begins with the inauguration of the ‘new model’ type of Amalgamated Society, and extends to the end of the trade boom of the early seventies, stopping just short of the Great Depression which set in about 1875.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S1873084100000148
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  • 6
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    Preliminary experiments on vernalisation (1935)
    Cambridge University Press
    Details
    Publication Date: 1935-04-01
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 7
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    The effect of applying a nitrogenous fertiliser to wheat at different stages of growth (1936)
    Cambridge University Press
    Details
    Publication Date: 1936-07-01
    Description: The effect of applying a nitrogenous fertiliser to wheat at seven different times and three rates, was studied in pot culture. It was found that the later the time of application the smaller was the increase in the yield of total dry matter and of straw. The increase in the yield of grain, on the other hand, was constant for the first six times of application, the last of which was made on May 25, but a later application made after ear emergence produced no increase.Analysis of the grain yield showed that early application produced its effect by increasing the number of ears per plant. Later applications caused a smaller increase in ear number, but also increased the number of grains per ear and 1000-corn weight. There was no evidence of a critical time for tiller formation such as has been postulated by Doughty and Engledow.The increase in total nitrogen uptake was equal for all times of application, but the ratio of nitrogen in grain to nitrogen in straw and chaff was greater, the later the time of application.The writer wishes to thank Messrs A. M. S. Clarke, G. T. Detlefsen and S. A. W. French for much help with the experimental work, and Mr R. G. Warren for making the nitrogen determinations.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 8
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    Notes on the osmotic pressure of the contents of the stomach compartments of the sheep (1936)
    Cambridge University Press
    Details
    Publication Date: 1936-04-01
    Description: 1. A comparison is made of Δ for the blood of sheep with Δ for the contents of the stomach compartments. It is suggested that the approximate identity of the two sets of values is best explained by the view that absorption takes place from the compartments.2. A variation of 0·570–0·630 is recorded for Δ for the blood of sheep.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 9
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    Experiments on vernalisation (1936)
    Cambridge University Press
    Details
    Publication Date: 1936-01-01
    Description: 1. The effect of low-temperature treatment on some varieties of wheat, barley and oats has been found to be profoundly affected by the time of sowing of the treated grain.2. Winter sowing showed the least vernalisation effect, while in the spring the stimulative action became more pronounced as far as earing acceleration is concerned, as the sowing was made progressively later. This was particularly marked in winter varieties.3. Developmental studies of the control and vernalised plants showed the stimulative action on early growth and growing point development in the winter varieties.4. Tiller counts on control and vernalised plants of three winter wheat varieties demonstrated the fact that each variety was stimulated to earlier tiller production, but in two of the varieties this resulted in a reduction of surviving ears at harvest.
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    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 10
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    Weaning weight of pigs and litter sampling with reference to litter size (1937)
    Cambridge University Press
    Details
    Publication Date: 1937-10-01
    Description: 1. Following an examination of weaning weight with respect to litter size, it is concluded that no general relation between the two exists. Although a significant regression of weight on litter size was found, it appears probable that in herds where the relation between fertility and milk yield is different, such a regression will not necessarily be found.2. A sampling experiment was carried out to determine the extent to which a sample might be expected to represent the whole litter. A correlation of 0·96 was found between the mean growth rate of samples consisting of the four pigs nearest the average at weaning and the mean of the whole litter. This represents a loss of 8 per cent of the information. With three or two pigs chosen in the same way the loss was greater. Samples of four pigs chosen at random did not give results significantly different from those of the four pigs nearest the average. The choice of the heaviest four pigs resulted in a loss of 15 per cent of the information.3. The slight difference between the results from the random sample and the sample of the four average pigs indicated that there must have been only a small correlation, between weaning weight and subsequent rate of growth. An analysis of post-weaning rate of growth showed that the intra-class correlation of pigs of the same weaning weight was 0·15. Individual weight at weaning would therefore appear to be of slight value in estimating subsequent performance.4. Intra-litter correlations of growth rate for litter classes eight and nine were found to be 0·3 and 0·5. These values are higher than those found by others, probably as a result of the inclusion of the pre-weaning period in the calculation of the growth rates. There would appear to be grounds for believing that at least a fifth of the individual variance may be accounted for by additive gene effects.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Cambridge University Press
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