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761. Metal cell for use in vapour pressure measurements by the Knudsen effusion method
339
Classified Abstracts 760---764 45
"/60. Brazing stainless steel. Anon., Nucl. Engng, 7 (72), May 1962, 197.
are of the form of true circular knife-edged holes with easily determined dimensions. (Author, slightly modified) S. Blairs, R. A. J. Shelton and R. Unsworth, J. Sci. Instrum., 38 (12), Dec. 1961, 469-470.
49.
47. Outgassing Data, Vapour Pressure Data, Gettering Data, Residual Gases in Vacuum Systems, Residual Gas Analysis
Miscellaneous Materials and Techniques 49
47
761. Metal cell for use in vapour pressure measurements by the Knudsen effusion method. Great Britain. Full constructional details are given for an effusion cell in Armco iron, which has been used in conjunction with a calibrated glass spring and a cathetometer to measure the vapour pressure over solid ferric chloride in the temperature range 100-200°C. The chief advantage claimed for the cell is that the effusion orifices, in interchangeable push fit end-caps,
762. Clean make-up air eliminates many problems. United States. Filters in a Prccipitron air cleaner draw more air into the paint finishing area than is exhausted, thus the room is pressurized which prevents any dust or dirt from entering by windows or doors. R.J.H. N. W. Tamroff, Industr. Finish., April 1962, 24-26. 49 : 20
Substitute for metal boats used in vacuum evaporation.
See
Abstr. No. 634.
Basic Science and Engineering 51.
56.
Physics, Astronomy, Geophysics
Electrical Engineering, Electronic Circuits, E l e c t r i c a l Devices
51:22
Experimental microbarograph.
51:30
Colloquium on optical materials--Paris, 1961.
56:18 Life indicating valves.
See Abstr. No. 652.
See Abstr. No.
687.
See Abstr. No. 621.
Thin metal films in millimetre wave measurements. No. 681.
56 : 30 See Abstr. 56 : 31
The magnitude of trigger tube ignition voltage changes caused by previous discharges. See Abstr. No. 696. 51 : 33
Image intensifier tubes and Astronomy.
See Abstr./'40. 703.
56:31
Argon, xenon, and krypton admixtures in neon glow-discharge reference tubes. See Abstr. No. 697.
51 : 33
High-pressure hydrogen gas target.
56 : 33
Thermionie generators. See Abstr. No. 705.
See Abstr. No. 708.
Miscellaneous 61.
Standards, Nomenclature, Units 61
763. New scale of nuclidic masses and atomic weights. United States. For about 30 years two scales, known respectively as physical and chemical, have been in use for expressing the relative masses of atomic particles. Both scales are based on the integral number 16. On the chemical scale, this number was used as the relative atomic weight of the element oxygen. On the physical scale, this same figure denoted the atomic mass of the principal isotope of oxygen, the atomic weight of natural oxygen being approximately 16.004 instead of 16. The new scale, proposed jointly by the International Unions of Pure and Applied Physics and Pure and Applied Chemistry respectively,
has as its denominator the integral number 12 as the relative mass of the atom of the principal isotope of carbon 12C. On this scale, the atomic weight of oxygen is 15.9994 and that of hydrogen 1.00797. A complete set of new values is given in a table. W. J. S.
E. Wichers, Nature, Lond., 194 (4829), 19 May 1962, 621-624.
63.
Documentation, Abstracts, Bibliographies 63
764. Bibliography and index on vacuum and low pressure measurement. W. G. Brombacher, N.B.S. Monograph, 35, 10 Nov. 1961.
Classified Abstracts 760---764 45
"/60. Brazing stainless steel. Anon., Nucl. Engng, 7 (72), May 1962, 197.
are of the form of true circular knife-edged holes with easily determined dimensions. (Author, slightly modified) S. Blairs, R. A. J. Shelton and R. Unsworth, J. Sci. Instrum., 38 (12), Dec. 1961, 469-470.
49.
47. Outgassing Data, Vapour Pressure Data, Gettering Data, Residual Gases in Vacuum Systems, Residual Gas Analysis
Miscellaneous Materials and Techniques 49
47
761. Metal cell for use in vapour pressure measurements by the Knudsen effusion method. Great Britain. Full constructional details are given for an effusion cell in Armco iron, which has been used in conjunction with a calibrated glass spring and a cathetometer to measure the vapour pressure over solid ferric chloride in the temperature range 100-200°C. The chief advantage claimed for the cell is that the effusion orifices, in interchangeable push fit end-caps,
762. Clean make-up air eliminates many problems. United States. Filters in a Prccipitron air cleaner draw more air into the paint finishing area than is exhausted, thus the room is pressurized which prevents any dust or dirt from entering by windows or doors. R.J.H. N. W. Tamroff, Industr. Finish., April 1962, 24-26. 49 : 20
Substitute for metal boats used in vacuum evaporation.
See
Abstr. No. 634.
Basic Science and Engineering 51.
56.
Physics, Astronomy, Geophysics
Electrical Engineering, Electronic Circuits, E l e c t r i c a l Devices
51:22
Experimental microbarograph.
51:30
Colloquium on optical materials--Paris, 1961.
56:18 Life indicating valves.
See Abstr. No. 652.
See Abstr. No.
687.
See Abstr. No. 621.
Thin metal films in millimetre wave measurements. No. 681.
56 : 30 See Abstr. 56 : 31
The magnitude of trigger tube ignition voltage changes caused by previous discharges. See Abstr. No. 696. 51 : 33
Image intensifier tubes and Astronomy.
See Abstr./'40. 703.
56:31
Argon, xenon, and krypton admixtures in neon glow-discharge reference tubes. See Abstr. No. 697.
51 : 33
High-pressure hydrogen gas target.
56 : 33
Thermionie generators. See Abstr. No. 705.
See Abstr. No. 708.
Miscellaneous 61.
Standards, Nomenclature, Units 61
763. New scale of nuclidic masses and atomic weights. United States. For about 30 years two scales, known respectively as physical and chemical, have been in use for expressing the relative masses of atomic particles. Both scales are based on the integral number 16. On the chemical scale, this number was used as the relative atomic weight of the element oxygen. On the physical scale, this same figure denoted the atomic mass of the principal isotope of oxygen, the atomic weight of natural oxygen being approximately 16.004 instead of 16. The new scale, proposed jointly by the International Unions of Pure and Applied Physics and Pure and Applied Chemistry respectively,
has as its denominator the integral number 12 as the relative mass of the atom of the principal isotope of carbon 12C. On this scale, the atomic weight of oxygen is 15.9994 and that of hydrogen 1.00797. A complete set of new values is given in a table. W. J. S.
E. Wichers, Nature, Lond., 194 (4829), 19 May 1962, 621-624.
63.
Documentation, Abstracts, Bibliographies 63
764. Bibliography and index on vacuum and low pressure measurement. W. G. Brombacher, N.B.S. Monograph, 35, 10 Nov. 1961.