The plagiarisms of Julius Jeffreys, F.R.S., in his treatise on the statics of the human chest / by G. Calvert Holland.

Date:
1844
Catalogue details

Licence: Public Domain Mark

Credit: The plagiarisms of Julius Jeffreys, F.R.S., in his treatise on the statics of the human chest / by G. Calvert Holland. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    25/36 (page 25)
    the lungs; but it is that of expiration to retard it. If, then, we have a preponderance of expiratory actions we diminish the quan- tity of blood generally circulating through the respiratory organs; and this being the case, we shall observe the heart beating with unusual vigour, at times amounting to palpitation, the pulse quick and strong, the countenance flushed, the whole surface of the body exhibiting improved circulation, and increase of temperature.”* “ An inspiration draws in the quantity of air necessary to support the chemical changes of the blood; an expiration expels that which is deprived of its vital properties. It may, perhaps, therefore, be inferred, that one act will invariably succeed another, and that the quantity of air inspired will be exactly proportionate to that emitted by the previous expiration , so that the generation of animal heat can- not be influenced by a preponderating degree of completeness or frequency in either of the individual acts. Such inferences will, however, be found, on mature examination, to be incorrect. In- spiration and expiration are susceptible of two modifications, a change in the frequency and in the fulness of their respective acts. In speaking, for example, there are many expirations in quick succes sion, whose constant expenditure of air is supplied by deep inspirations, made at intervals, wliich are equivalent to the more numerous but less complete expirations. It may, perhaps, be thought that the qualities of the blood cannot be much influenced by a preponderance in the frequency of expirations, as the inspira- tions, though few, contribute, within a given period, a quantity of air equal to that which has been expelled. But that the properties of the blood are thus considerably affected, and that this is a necessary consequence of frequent expiration will be evident on considering the condition of the vital fluid in the two opposite states of respiration.”f } He has generally been exceedingly guarded in not em- ploying' the precise terms used in my writings. In the following passage, nevertheless, his argument, in language only slightly altered from my own, in relation to the fre- quent changes in the volume of the air in the chest, and * Experimental Inquiry, p. 10. f Principles of Medicine, p. 307. + T,ie passages in italics, -as originally printed.