| Description | Brief listing of exhibits and exhibitors at the Royal Society's annual displays at Burlington House, London, with descriptive text. Arranged by rooms. Rooms 1-5 and Meeting Room. The programme commences with a note on demonstrations taking place during the evening and the catalogue of exhibits begins with a disclaimer: 'The descriptions of Exhibits in this Catalogue are supplied by the Exhibitors, who alone are responsible for their accuracy'.
Room 1:
1. Demonstration of the photo-conductivity of diamond, exhibited by the Government Laboratory.
2. Recording and indicating thermionic electrometers and hydrogen-ion meters, exhibited by Mr. C. Morton.
3. Heat production of muscle and nerve, exhibited by Archibald Vivian Hill.
4. Technical applications of x-ray crystal analysis (Dr. G. Shearer, Mr. W. A. Wood, Mr. J. Thomas), exhibited by the National Physical Laboratory.
5. Cambridge smoke or dust recorder, exhibited by the Cambridge Instrument Company Limited.
Room 2 (Reception Room):
The Mace of the Royal Society. Presented by King Charles II in 1663.
6. Plant mimicry, giant senecios from the high mountains of East Africa (Mr. A. D. [Arthur Disbrowe] Cotton), exhibited by Arthur William Hill, the Director, Royal Botanic Gardens, Kew.
7. Nothosaurus reptiles from Lombardy, exhibited by the Department of Geology, British Museum (Natural History).
8. Pleistocene Dinotherium, exhibited by the Department of Geology, British Museum (Natural History).
9. New apparatus for rapid ultra-violet spectrophotometry, infra-red spectroscope for the measurement of the absorption of gases, Hilger x-ray metalograph, solution calculating instrument, Messrs. Adam Hilger Limited.
10. Quartz ring oscillator and chronograph for radio-frequency and other measurements (the late Dr. W. D. [e.g. David William] Dye), exhibited by the National Physical Laboratory.
11. Origin of the Oenothera type of mutation (Mrs Eva Richardson Sansome), exhibited by the John Innes Horticultural Institution.
12. New facts bearing on the relations of dominant and recessive allelomorphs in Pisum sativum (Miss Caroline Pellew), exhibited by the John Innes Horticultural Institution.
13. X-ray treatment of Primula sinensis (Mr. L. H. A. Stone), exhibited by the John Innes Horticultural Institution.
14. Chromosome numbers in species of crocus (Mr. K. [Kenneth] Mather), exhibited by the John Innes Horticultural Institution.
15. High speed automatic counting by means of thyratrons, exhibited by Charles Eryl Wynn-Williams.
16. Apparatus for showing rheostatic behaviour of Planarians from streams, exhibited by the Freshwater Biological Association of the British Empire.
Room 3:
17. The physical properties of soil particles (Dr. B. A. [Bernard Augustus] Keen and staff of Soil Physics Department), exhibited by Rothamsted Experimental Station.
18. Crystalline vitamin D (Mr. F. A. [Frederick Anderton] Askew, Dr. R. K. [Robert Kenneth] Callow, Mr. J. St. L. Philpot, and Mr. T. A. [Thomas Arthur] Webster), exhibited by the National Institute for Medical Research.
19. The reproductive cycles of the mole, grey squirrel, hedgehog and stoat, exhibited by Alan Sterling Parkes.
20. Photographs showing the effects of 'shock-waves' on explosion flames and the phenomenon of 'spin' in detonation of gaseous media, exhibited by William Arthur Bone and Mr. R. P. Fraser.
21. Pressure-time records of explosions in hydrogen-air and carbonic oxide-air etc., mixtures at initial pressures between 75 and 1,000 atmospheres, exhibited by William Arthur Bone, Dudley Maurice Newitt and Donald T. A. Townend.
22. Harmonic analyser, exhibited by John Harvey.
23. The heliodon an instrument for demonstrating the apparent motion of the Sun, exhibited by Mr. A. F. Dufton and Mr. H. E. Beckett.
Room 4 (Principal Library):
24. Apparatus illustrating the generation, propagation and reception of very short electric waves (wave-lengths less than one metre), exhibited by the Research Laboratories of the General Electric Company.
25. Pendulum apparatus with simultaneous registration of pendulum oscillations and wireless time signals, exhibited by Sir Gerald Lenox-Conyngham.
26. Electronic diffraction, exhibited by George Paget Thompson.
27. A 400 K.V. protected x-ray tube to operate continuously on the pumps, selection of comparative radiographs of engineering structures obtained by gamma and x-rays, exhibited by the Research Department, Woolwich.
28. Apparatus developed in the Research Laboratories of Imperial Chemical Industries (Alkali) Limited, Northwich, Cheshire, exhibited by Imperial Chemical Industries Limited.
29. Robert Hooke's hygroscope - the first attempt to construct an instrument to show 'The driness and moisture of ambient air', exhibited by George Hugh Gabb.
30. The forces acting on drops in an electric field, exhibited by Dr. G. D. West.
31. 'Standard' telegraph time distortion measuring set, exhibited by Standard Telephones and Cables Limited.
32. Living cultures of malignant and non-malignant cells showing the reaction of different types of cells to vital dyes (Dr. J. A. [James Alexander] Murray, Dr. R. J. Ludford and Mr. W. J. Dunn), exhibited by the Laboratories of the Imperial Cancer Research Fund.
33. Bidwell's experiment, exhibited by Sir William Henry Bragg.
34. Electrical capacity recording dilatometer (Mr. W. E. Prytherch), exhibited by the National Physical Laboratory.
35. Meteoric irons from the meteorite craters in central Australia (Dr. L. J. [Leonard James] Spencer), exhibited by the Department of Mineralogy, British Museum (Natural History). 36. Structural diversity in Charadriine genera correlated with similarity of colour pattern (Mr. P. R. [Percy Roycroft] Lowe), exhibited by the Department of Zoology, British Museum (Natural History).
37. Models illustrating the remarkable 'Rhynchoteuthion' stage in the development of the Ommatostrephid squids (Cephalopoda decapoda) (based on specimens obtained by Dr. W. [Charles William] Beebe off the Galapagos Islands (Mr. G. C. [Guy Cole] Robson), exhibited by the Department of Zoology, British Museum (Natural History).
38. Eocarcinus from the Lower Lias with related forms of later date and its recent relatives, exhibited by the Department of Geology, British Museum (Natural History).
39. Vital staining in vitro as a method for the study of the physiology and pathology of the cell (Dr. R. J. Ludford), exhibited by the Laboratories of the Imperial Cancer Research Fund.
40. The vital staining of the filterable tumours of the fowl (Dr. L. [Leslie] Foulds), exhibited by the Laboratories of the Imperial Cancer Research Fund.
41. The cytological action of radium upon malignant growths (Dr. R. J. Ludford), exhibited by the Laboratories of the Imperial Cancer Research Fund.
42. Mode of action of radium on malignant new growths (Dr. W. [William] Cramer), exhibited by the Laboratories of the Imperial Cancer Research Fund.
43. Elementary bodies in certain virus diseases (vaccinia and fowlpox) and their etiological significance, cultural forms in broth and agar of the causative organisms of pleuropneumonia and agalactia (Professor J, C. G. [John Charles Grant] Ledingham), exhibited by the Lister Institute.
44. Distribution and changes in habit and structure in the transparent Burnet moth Zygaena purpuralis, exhibited by Humphrey Robert Hewer..
Room 5 Ground Floor (End of Corridor):
45. The cathode ray oscillograph in radio research, exhibited by the Department of Scientific and Industrial Research, Radio Research Station, Slough.
Meeting Room:
At 9.15 and 10.30 o'clock.
The cathode ray oscillograph in radio research, exhibited by Robert Alexander Watson Watt.
At 10 o'clock.
The activity of the nerve cells and sense organs, exhibited by Edgar Douglas Adrian and Bryan Harold Cabot Matthews.
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