| 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 1-4 and Ground Floor. The programme commences with a note on demonstrations taking place during the evening. The Royal Society's coat of arms is printed in red on the title page.
Room 1 (Officers' Room):
1. Water hammer cone demonstrating the destructive effect of collapsing vortex cavities, exhibited by Sir Charles Algernon Parsons.
2. Demonstrations of fluorescence in lepidoptera by ultra violet radiation, exhibited by Dr. J. C. Mottram and Edward Alfred Cockayne.
Room 2 (Reception Room):
Mace of the Royal Society. Presented by King Charles II in 1663.
3. The Douglas Fir flag staff and its erection in the Royal Botanic Gardens, exhibited by Sir David Prain, the Director, Royal Botanic Gardens, Kew.
4. Some recent applications of the x-rays, exhibited by Major George William Clarkson Kaye.
5. Models illustrating the atomic arrangement in potassium chloride and aluminium chloride and also tartaric acid, exhibited by William Barlow.
6. Microscope and accessories made by Powell and Lealand in 1843, barometer used by Charles Darwin on his voyage on the 'Beagle', exhibited by the Royal Society.
Room 3 (Old Council Room):
7. Clays treated by electro-osmosis: photomicrographs and specimens of articles made with osmosed clay, exhibited by the Osmosis Company Limited.
8. Wireless telegraph apparatus, exhibited by Marconi's Wireless Telegraph Company Limited.
9. New instruments and diagrams, exhibited by the Meteorological Office.
Room 4 (Principal Library):
10. Portrait of the Rev. F. [Francis] Bashforth aged 92, pioneer of the modern ballistic theory, exhibited by Sir George Greenhill.
11. Lamp filament temperature measurements by the method of colour identity (Mr. J. W. T. Walsh), exhibited by the National Physical Laboratory.
12. Apparatus for the determination of the thermal conductivity of poor conductors, duplex reversal key, simple form of apparatus for determination of coefficient of expansion at high temperatures (Dr. E. Griffiths), exhibited by the National Physical Laboratory.
13. Types of British and German compasses, exhibited by the Admiralty Compass Department.
14. Apparatus for air navigation, exhibited by the Air Ministry Laboratory.
15. Apparatus for metering fuel oil, exhibited by Thomas E. Beacham and Mr. A. J. Boyd.
16. International map on the scale 1: Million, exhibited by the Central Bureau of the International Map (Ordnance Survey, Southampton) and Auxiliary Bureau in London (Royal Geographical Society).
17. Synthetic products for perfumery, exhibited by Messrs. J. Crosfield & Son Limited.
18. Optic indicator for internal combustion engines, exhibited by Frederick William Burstall.
19. Aircraft instruments, exhibited by the Royal Aircraft Establishment, South Farnborough.
20. A method of demonstrating flagellae on micro-organisms, photo-micrographs obtained by means of ultra-violet light, exhibited by Joseph Edward Barnard and Dr. W. Topley.
21. Four transparencies of total eclipse of the Sun, 29th May 1919, five photographs of Sun and sun-spots, photograph of records magnetic disturbance 22nd-25th March 1920, diagram showing variation of latitude from 1912 to 1919, exhibited by the Royal Observatory, Greenwich.
22. Three photographs of portions of the Moon taken with the 100-inch telescope of the Mount Wilson Observatory, exhibited by the Royal Astronomical Society.
23. Palaeozoic starfish and their habits, exhibited by William Kingdon Spencer.
24. Culture of Amoeba proteus, Lepidosiren cell nuclei, exhibited by John Graham Kerr.
25. Nerve end-cells in the pulp of the human tooth, exhibited by John Howard Mummery.
26. Recording porometer for investigating the varying size of air pores (stomata) of the leaf, exhibited by the Botany Department, Imperial College of Science and Technology.
27. Specimens from a factory of Neolithic stone axes at Graig-lwyd, Penmaenmawr, exhibited by Samuel Hazzledine Warren.
28. A large Palaeolithic implement from the gravel at Furze Platt, near Maidenhead, exhibited by Llewellyn Treacher.
29. The Boskop skull, exhibited by Arthur Smith Woodward.
30. Pleistocene bones from Ipswich, exhibited by Miss Nina Frances Layard.
31. The effect of an accessory food factor (vitamine) on (1) the production of rickets in puppies, (2) the development of the teeth in puppies, exhibited by Edward Mellanby and Mrs May Mellanby
32. Samples of mite-infested flour, exhibited by Robert Newstead.
33. Living specimens of Simocephalus, exhibited by Herbert Graham Cannon.
34. Stalked echinoderms with a horizontal habit of growth, squeezes from Ordovician fossils, exhibited by Francis Arthur Bather.
35. Portrait in oil of J. T. Desaguliers F.R.S. This portrait hitherto unknown has been recently discovered and is possibly the work of Richardson, Microscope made for Joseph Priestly by Benjamin Martin 'at the new invented visual glasses, Fleet Steet' with its receipted bill dated 1767, original letter of Priestley written at Calne 1779, exhibited by George Hugh Gabb.
Meeting Room:
The following demonstrations will take place.
At 9.45 o'clock and again at 10.30 o'clock.
A short exposition (illustrated by lantern slides) of wireless telegraphy, exhibited by Alan Archibald Campbell Swinton, in connection with an experimental demonstration by the Marconi Wireless telegraphy Company Limited, from their works at Chelmsford.
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