Reference numberRR/15/154
TitleReferee's report by Henry Selby Hele-Shaw, on a paper 'A determination by a thermal method of the variation of the critical velocity of water with temperature' by Howard Turner Barnes and Ernest George Coker
Date15 October 1901
DescriptionSectional committee: [Engineering sciences]

He has concluded that the experimental method adopted by the authors is open to at least two serious objections, firstly that the insertion of a thermometer in the centre of the pipe where the velocity would be highest, cannot be without effect on the critical velocity of the stream. The author's refer to the use of colour bands as corroborating the point of critical velocity in their experiments, and indicate that they are sure that the sudden jump of the thermometer takes place at the same time that the colour band would break up, but he does not see sufficient evidence to justify this confidence in the accuracy of the method of taking observations by an inserted thermometer. Thinks varying lengths of tube should be used and the position of the thermometer altered to see how this affects the results. The second objection to the experimental method is that the influence of the hot water jacket must be felt in producing convection current in the stream.

He would be sorry to say that his objections to the method had any practical weight if their results had been at all consistent and had agreed with the mathematical theory which is generally accepted. However, the results as shown on the plotted curve of figure two, are such as might be represented by curves of quite a different form to that shown by the authors.He is sorry that the first paper sent to him for an opinion by the Society is not one he can recommend for publication. It would in his humble judgement take a much more extended series of observations in order to justify the acceptance of the formula suggested on the bottom of page 14 for the author's temperature curve.

Would prefer to see the paper sent to another referee without any notice being taken of his own views. Notes that he consulted his colleague Professor Wilberforce before coming to the conclusions stated, and Wilberforce agreed with him. Hopes the authors will be encouraged to pursue their work which should give most valuable results ultimately. The publication of a new law under the circumstances is premature.

[Not published].

Endorsed on recto as received 16 October 1901.
Physical descriptionLetter on paper
Digital imagesView item on Science in the Making
Access statusOpen
Related records in the catalogueRR/15/155
Fellows associated with this archive
NA1726Hele-Shaw; Henry Selby (1854 - 1941)1854 - 1941
NA4794Barnes; Howard Turner (1873 - 1950); physicist1873 - 1950
NA1155Coker; Ernest George (1869 - 1946)1869 - 1946
Add to My Items

    Collection highlights

    Browse the records of some of our collections, which cover all branches of science and date from the 12th century onwards. These include the published works of Fellows of the Royal Society, personal papers of eminent scientists, letters and manuscripts sent to the Society or presented at meetings, and administrative records documenting the Society's activities since our foundation in 1660.

    The Royal Society

    The Royal Society is a Fellowship of many of
    the world's most eminent scientists and is the
    oldest scientific academy in continuous existence.
    Registered charity number 207043

    Website design ©CalmView


    + 44 207 451 2500
    (Lines open Mon-Fri, 9:00-17:00. Excludes bank holidays)

    6-9 Carlton House Terrace, London SW1Y 5AG

    Email Us →


    Subscribe to our newsletters to be updated with the
    latest news on innovation, events, articles and reports.

    Subscribe →

    © CalmView