[James Dewar & W.J.Green]

MS File DE2B, 1-80

Notes on measurement of radiation from the sky.

1. Notes on cell and on membranes used; vessel cooled externally. 19-27 Jan. 1920; 2pp, MS; DEWAR/DE2B/1.

2. Notes and curves: observations on gas cooled cell. 28-30 Jan. 1920; 2pp, MS; DEWAR/DE2B/2.

3. Sky radiation: notes on apparatus and on wind disturbance. 7-9 Feb. 1920; 1½pp, MS; DEWAR/DE2B/3.

4. Charcoal thermoscope: variation of zero alteration with height of instrument; empty cell - fluctuations due to membrane flexibility. 9 Feb. 1920; 1p, MS; DEWAR/DE2B/4.

5. Charcoal thermoscope, sky radiation: comparative values obtained from exposure to open sky and to black cube at open air temperature. 7-9 Feb. 1920; ¾p, MS; DEWAR/DE2B/5.

6. Imitation of wind over thermoscope vessel; observations on roof in 10-15 mph wind; modifications to apparatus. 10 Feb. 1920; 21/3pp, MS; DEWAR/DE2B/6.

7. Sky radiation: comparison with black cube. 13-16 Feb. 1920; 2pp, MS; DEWAR/DE2B/7.

8. Observations using simple thermoscope with liquid air stopper instead of trap door. 20-21 Feb 1920; 1p, MS; DEWAR/DE2B/8.

9. Thermoscope in 2½ litre window silvered vacuum flask: drawings of apparatus, with description, and notes of sky radiation observations; notes on arc lamp radiation. 1-5 March 1920; 3½pp, MS; DEWAR/DE2B/9.

10. Comparison of readings of thermoscope with and without black paper lining and with Sn foil lining. March 1920; 2/3p, MS; DEWAR/DE2B/10.

11. Hilger cell thermoscope in 2½ litre flask, copper inner vessel; sky radiation observations and arc lamp radiation. Observations with modified apparatus. 6-20 March 1920; 5pp, MS; DEWAR/DE2B/11.

12. Flask thermoscope readings - sky radiation. 8-25 March 1920; 1¾pp, MS; DEWAR/DE2B/12.

13. Sky radiations, flask vacuum vessel thermoscope with horizontal alcohol manometer added. Notes, 13-17 March 1920; 1p, MS; DEWAR/DE2B/13.

14. Charcoal thermoscope; 2½ litre flask and internal tube: comparison of different reflecting tubes: 22-25 March 1920; 2pp, MS; DEWAR/DE2B/14.

15. Charcoal thermoscope: shortened black paper cylinder; brass cylinder. Notes on apparatus; radiation observations. 25-30 March 1920; 3pp, MS; DEWAR/DE2B/15.

16. Sky radiation observations and note on reflecting cylinder. 31 March-6 April 1920; 5pp, MS; DEWAR/DE2B/16.

17. Observations with 2½ litre flask thermoscope, brass cylinder with lead bottom, brass cone apeture on. 7-8 April 1920; 1¼ pp, MS; DEWAR/DE2B/17.

18. Observations with flask thermoscope, closed brass cylinder blackened inside. 8-9 April 1920; 1p, MS; DEWAR/DE2B/18.

19. Observations with thermoscope in 2½ litre flask; short brass cylinder black inside, soldered-in lead bottom. 10-13 April 1920; 1¾pp, MS; DEWAR/DE2B/19.

20. Laboratory tests of thermoscope; evening and night sky observations. 13-14 April 1920; 2pp, MS; DEWAR/DE2B/20.

21. Observations with flask thermoscope; notes on reflecting powers of metals. 15-21 April 1920; 21/3pp, MS; DEWAR/DE2B/21.

22. Flask thermoscope, neck radiation with reflecting interior. 22-23 April 1920; 1p, MS; DEWAR/DE2B/22.

23. Sky measures with thermoscope on roof of R.I. Physics Laboratory. 24-26 April 1920; 1p, MS; DEWAR/DE2B/23.

24. Sky measures; emissivity effect of warmer polished metal in and on neck. 26-28 April 1920; 2pp, MS; DEWAR/DE2B/24.

25. Sky and moon (eclipse) observations at Mill Hill. 1-2 May, 1920; 3pp, MS; DEWAR/DE2B/25.

26. Night sky and moon observations, Mill Hill. 3-5 May 1920; 3pp, MS; DEWAR/DE2B/26.

27. Sky measures. Notes on possible addition of copper burnished dome and disc to flask neck. Notes on variable and discordant "black" readings. 9-10 May 1920; 1½pp, MS; DEWAR/DE2B/27.

28. Sky readings. Thermoscope with Al neck lining and Al baffle diaphragm in neck; comparison of zenith/black ratios with each. 10-14 May 1920; 1¾pp, MS; DEWAR/DE2B/28.

29. Sky readings, Mill Hill; internally (surface) silvered thermoscope flask. 15-17 May 1920; 2pp, MS; DEWAR/DE2B/29.

30. Flask thermoscope - reflecting Al lining in neck, use of Al baffle diaphragms. Calibration of thermoscope. Sky readings at Mill Hill. 17-19 May 1920; 10pp, MS; DEWAR/DE2B/30.

31. Notes on modifications to thermoscope - addition of polished copper dome; aluminium drum in flask neck. 26-29 May 1920. 3pp, MS; DEWAR/DE2B/31.

32. Low readings of night sky; thermoscope on Physics Laboratory roof. 7-13 June 1920; 4pp, MS; DEWAR/DE2B/32.

33. Night sky observations. 14-19 June 1920; 4pp, MS; DEWAR/DE2B/33.

34. Sky readings; modifications to and overhaul of apparatus. 21-29 June 1920; 4pp, MS; DEWAR/DE2B/34.

35. Sky readings, 29 June-9 July 1920; 3pp, MS; DEWAR/DE2B/35.

36. Sky readings: Physics Laboratory; sliding window thermoscope 1-14 July 1920; 3½pp, MS; DEWAR/DE2B/36.

37. Sky readings from roof of Physics Laboratory; cool and warm walls; drawing of apparatus - trap door opened and shut by wire over grooved wheel, instead of opened by chain and closed by gravity. 14-16 July 1920; 2pp, MS; DEWAR/DE2B/37.

38. Sky readings; modifications to apparatus. 19-20 July 1920; 1½pp, MS; DEWAR/DE2B/38.

39. Readings: black variation with altering depth of liquid oxygen. 8 July - 4 August. Includes note by Dewar on blacking of aluminium drum. 1¾pp, MS; DEWAR/DE2B/39.

40. NaCl cell tests. 28-30 July; 2pp, MS; DEWAR/DE2B/40.

41. NaCl cell tests. 30-31 July 1920; 2pp MS; DEWAR/DE2B/41

42. Sky radiation readings; thermoscope on Physics Lab. roof. 31 July-14 August 1920; 5pp, MS; DEWAR/DE2B/42.

43. Rough jottings of readings, 17 August; 1p, MS; DEWAR/DE2B/43.

44. Sky readings; use of copper neck drum; 9-10 August. 1p, MS; DEWAR/DE2B/44.

45. Sky readings; thermoscope in lantern roof window platform, inner Physics Lab.; June-July 1920; 2pp, MS; DEWAR/DE2B/45.

46. 2½ litre flask thermoscope; resume of radiation work to 21 April 1920; 4pp, MS; DEWAR/DE2B/46.

47. Estimation of neck correction with Al drum (liquid air basin polished Al disc); negative effects. June 1920 3¼pp, MS; DEWAR/DE2B/47.

48. Resume of neck errors; April-Aug 1920; 1p, MS; DEWAR/DE2B/48.

49. Readings: Hilger cell, separable coned ground ring on cell; 6 Feb 1921; 1p, MS; DEWAR/DE2B/49.

50. Forms of 2 litre flask thermoscope: development and modifications, March to August 1920. 7pp, typescript & MS; DEWAR/DE2B/50.

51. Curve: thermoscope exposed and equilibrated to B @ 10° C; exposed to open sky. 21 March 1920. 1p, MS; DEWAR/DE2b/51.

52. Dewar to Green, 24 Nov. 1920: discusses unsatisfactory trap door in apparatus; with readings. 2pp, MS; DEWAR/DE2b/51.

53. Set of curves at 5° intervals of earth temperature from O° C to 20° C from which theoretical black body temperature of the observed radiation is obtained. 24 Nov 1920; 1p, MS. DEWAR/DE2B/53.

54. Note of clear sky measures, 10-19 May 1920; ½ 2p, MS. DEWAR/DE2B/54.

55. Note of sky readings from R.I. and from Mill Hill, March-May 1920; 1p, MS. DEWAR/DE2B/55.

56. Notes on maintenance of platform thermoscope and manometer. 13 May 1921. 1p, MS;

57. Sky radiation, day measures, March-May 1921; 1p, MS; DEWAR/DE2B/57

58. Sky measures: rough notes; Nov. 1920; Jan-Aug. 1921; 68pp, MS; DEWAR/DE2B/58.

59. Notes on vapour pressure values at Kew and St James's Park, 7 March to 10 June 1921; 1p, MS; DEWAR/DE2B/59.

60. Cloudland Studies. Typescript of paper, January 1921; 25pp. DEWAR/DE2B/60.

61. Sky radiation tables, with annotations referring to 1921 abstract, 1920-21; 7pp, MS. With note by [W.J.Green] that typed copy was sent to J.H.D., 27 April 1925, and that H.M. [Ross's] queries were answered on 30 July 1925. DEWAR/DE2B/61

62. Draft of letter from [Green] to Ross, 30 July 1925 saying he has answered Ross's queries about the sky radiation tables with annotations in the margin. Comments on water vapour tension observations; 1p, MS; DEWAR/DE2B/62.

63. Envelope of notes on sky radiation readings, August-Sept 1920. 11pp + notes on envelope, MS; DEWAR/DE2B/63.

64. Radiation observations, with notes by Dewar on results; May 1920; 4pp, MS. DEWAR/DE2B/64.

65. Rough jottings of sky readings; note added that the records were found in a drawer. 2pp, MS; DEWAR/DE2B/65.

66. Sky readings, 27 March 1920; ½p, MS; DEWAR/DE2B/66.

67-72. Sky readings; rough notes, 17 April to 29 May. 12pp, MS. DEWAR/DE2B/67-72.

73. Rough notes and calculations: sky readings; undated. 2pp, MS; DEWAR/DE2B/73.

74. Sky readings, May 1920 including notes on apparatus; 2pp, MS; DEWAR/DE2B/74.

75-80. Rough notes on sky readings and on apparatus, Nov. 1920; 18pp, MS. DEWAR/DE2B/75-80.