The Practical Applications of X-raysThe Practical Applications of X-rays. By KayeG. W. C., O.B.E., M.A., D.Sc., A.R.C.Sc., F.Inst.P., Head of the Radiology Department, National Physical Laboratory, Past President of the Roentgen Society. New York, E. P. Dutton & Company, 1923.

Radiology ◽  
1924 ◽  
Vol 3 (4) ◽  
pp. 353-353
Keyword(s):  
New York ◽  
National Physical Laboratory ◽  
Radiology Department ◽  
X Rays ◽  
Past President ◽  
Practical Applications ◽  
Physical Laboratory

scholarly journals Leonard Bairstow, 1880-1963

1965 ◽  
Vol 11 ◽  
pp. 22-40
Keyword(s):  
Wind Tunnel ◽  
National Physical Laboratory ◽  
Practical Applications ◽  
Aerodynamic Derivatives ◽  
Physical Laboratory ◽  
Engineering Department ◽  
Tunnel Design ◽  
Wide Experience ◽  
Wind Tunnel Design ◽  
Made In

Leonard Bairstow was born at Halifax in Yorkshire on 25 June 1880 and began his education in the elementary and secondary schools of Halifax. In 1898 he obtained a scholarship at the Royal College of Science, London, where he was a fellow student of H . E. Wimperis, who declared in later years: ‘I remember that, for several decades there, the most brilliant student that had been produced by the College was Professor Bairstow. He had an uncanny faculty of making himself acquainted with and making completely original suggestions on subjects which we did not think he knew anything about.' He became a Whitworth Scholar in 1902 and took prizes in mechanics and astrophysics. In 1904 he entered the Engineering Department of the National Physical Laboratory. There he worked under Dr T. E. (later Sir Thomas) Stanton on problem s of fatigue and of aerodynamics. In 1909 he was appointed to the staff of the new section of Aerodynamics (later called the Aerodynamics Division), of which he became the Assistant (or Principal) in charge. During this period he carried out some pioneer investigations into wind-tunnel design, and made important developments and practical applications of the theory of aircraft stability due to G. H. Bryan. This theory he illustrated by the use of small mica models of aircraft, and the necessary measurements of aerodynamic derivatives were made in the wind tunnel. In 1917 he was elected a Fellow of the Royal Society and made a G.B.E. Glazebrook had offered him the post of Superintendent of the Aerodynamics Department at the N.P.L. but Bairstow resigned and was appointed to the Air Board to work for Sir David Henderson on the design of aircraft and on aerodynamics research. There Bairstow worked at the Hotel Cecil as deputy to Alec Ogilvie and, with his wide experience, was able to co-ordinate the departmental work on structural strength, aerodynamics, performance and air screws.

Design, Construction, and Use of Some Inspection Gauges

1945 ◽  
Vol 153 (1) ◽  
pp. 133-140
Author(s):  
L. H. Leedham
Keyword(s):  
National Physical Laboratory ◽  
Special Equipment ◽  
Practical Applications ◽  
Physical Laboratory ◽  
Jigs And Fixtures ◽  
Design Construction

The paper begins with a reference to the necessity of regarding inspection as part of the manufacturing programme. The provision of equipment for this purpose is just as important as the use of jigs and fixtures, and in all cases where “set-ups” would have to be made for inspection purposes, the provision of specially designed gauging fixtures is advised. Some fundamental principles of such equipment are next discussed, the weak features in some and the advantages of adopting the good points of others being stressed. The use of the crossed-strip mounting, developed at the National Physical Laboratory, for indicating-arms is discussed, and the use of dial and signal indicators receives attention. Descriptions are then given of varied applications to gauging apparatus for different components, each of which presents a problem in inspection. The possibility of utilizing the component itself, in such a way as to make it amplify variations in the feature being inspected, also receives some consideration. The multiple gauging of mass-produced components, using an ingenious indicator unit, concludes the descriptions of the practical applications. In studying the examples, a mental comparison should be made with the problem which each case would present to the inspector, in the absence of the special equipment.

scholarly journals The composition of the x-rays from various metals

1917 ◽  
Vol 93 (653) ◽  
pp. 427-442 ◽  
Keyword(s):  
National Physical Laboratory ◽  
Point Of View ◽  
X Rays ◽  
Crystal Spectrometer ◽  
Cavendish Laboratory ◽  
Precise Method ◽  
X Ray ◽  
Physical Laboratory ◽  
The Subject

In a paper published in the ‘Philosophical Transactions’ in 1908, the writer described some experiments on the X-rays emitted by a variety of metals when used as anticathodes in an X-ray bulb. Among the results established was the homogeneity of a large proportion of the X-rays when the bulb was very “soft.” The absorption curves of the several homogeneous radiations revealed their identities with the characteristic “secondary” radiations which Barkla and Sadler had then recently discovered. The experiments described in the present paper are an extension of the above, and were carried out partly at the Cavendish Laboratory in 1908 and partly at the National Physical Laboratory just prior to the war. The writer’s military duties have prevented the continuation of the work, and the results are now put on record in the hope that they may help to further the progress of the subject, to which the more precise method of the crystal-spectrometer has given a great impetus from a different point of view.

scholarly journals The application of X-rays to the study of alloys

1925 ◽  
Vol 108 (748) ◽  
pp. 643-654 ◽  
Keyword(s):  
Single Crystals ◽  
National Physical Laboratory ◽  
Photographic Method ◽  
X Rays ◽  
X Ray ◽  
Powder Method ◽  
Physical Laboratory ◽  
Small Crystals ◽  
Ray Methods ◽  
Great Advance

Since the middle of last century it has been known that the alloys, obtained by melting together two or more metals, are conglomerates of small crystals. As it is impossible to study them under the polarizing microscope because of their high absorbing power for light, and as they are seldom obtained in crystals with faces sufficiently well developed to allow a measurement of their angles, our crystallographic knowledge has been, until recently, extremely small. When, therefore, the X-ray methods came to the assistance of the metallurgist they were sure of a welcome. In 1922, Bain, using the powder-photograph method of Debye and Hull, carried out some very important pioneering work. In 1924, Owen and Preston, of the National Physical Laboratory, working in conjunction with Rosenhain studied the Cu-Al and Cu-Zn systems. They used a powder method with an ionization spectrometer. Their work marked a great advance, on account of the precision of their measurements and their detailed description of the preparation of the samples of alloys. At the same time Westgren and Phragmen, working in Stockholm with a photographic method, studied independently the same systems as Owen and Preston, and obtained results of equal precision. They extended the work in certain directions by making a more thorough investigation of single crystals. They have now undertaken an extensive research on several alloys and on steels.

scholarly journals 75th Foundation Day of CSIR-National Physical Laboratory: Celebration of Achievements in Metrology for National Growth

MAPAN ◽  
2021 ◽  
Author(s):  
Sanjay Yadav ◽  
Goutam Mandal ◽  
V. K. Jaiswal ◽  
D. D. Shivagan ◽  
D. K. Aswal
Keyword(s):  
National Physical Laboratory ◽  
Physical Laboratory ◽  
National Growth
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