| Description | Brief listing of exhibits and exhibitors at the Royal Society's annual displays at Burlington House, London, with occasional descriptive text. Arranged by rooms. Rooms 1-5.
Room 1: relics of Palaeolithic tool-making in the lower brick earth of Crayford, Kent, exhibited by Flaxman Charles John Spurrell.
Room 2: P. Angulatum with 1/25th oil immersion object glass, A. pellucida with 1/8th immersion object glass and oil immersion condenser, exhibited by Messrs Powell and Lealand; Toppler's influence electrical machine with 20 plates, exhibited by William Spottiswoode; an instrument by Abraham-Louis Breguet for marking the difference between mean time and solar time on every day of the year, exhibited by Rev. William Bentinck Letham Hawkins.
Room 3 (Reception Room): a collection of gems in three cases, exhibited by James Tennant.
Room 4: microscopes, specimens and experiments showing the assumption of spheroidal form by crystalline matter when deposited in colloids, exhibited by William Miller Ord; sections of selenite in polarised light and calcareous sponge (Grantia compressa) showing soft parts, exhibited by Charles Stewart; improved form of laboratory Gramme machine with circular magnets and six-plate Holtz electrical machine with ebonite plates, exhibited by W. Ladd and Company; Herschel's improved Wollaston's refractometer, exhibited by Alexander Stewart Herschel.
Room 5 (Principal Library): new automatic spectroscope devised by Dr. Liveing, prisms of double iodide of potassium and a spectroscope showing separation of sodium lines, micro-spectroscope with spectra showing purity differences in commercial anthracine, exhibited by John Browning; an electrical speed indicator for pumping engines, exhibited by Harry Robert Kempe; latest form of Wheatstone automatic telegraph and new form of lightning protector, exhibited by the General Post Office; new solar spectroscope with aluminium glass for the Observatory at Kalocsa, Hungary and new position micrometer for the Observatory at Sydney, Australia, exhibited by Adam Hilger; thermograph consisting of a Bourden brass twisted tube for registering changes in temperature continuously on paper, exhibited by Bryan Donkin & Company; chronograph, goniometer, Melloni apparatus, differential galvanometer, portable reflecting astatic galvanometer, set of resistance coils, Dr. Lodge's keys, exhibited by Messrs. Elliott Brothers; temnograph an instrument for plotting to any accurate scale a section of ground over which it travels, exhibited by Alexander Manson Rymer-Jones; the damposcope, or fire-damp indicator, exhibited by George Forbes; new arrangement of resistance coils, Wheatstone Bridge and Admiral Selwyn's galvanometer, triple-action chronograph for use with Attwood's machine, open-work aneroid, small model electric lamp for the production of light by arc or incandescence, miniature detector galvanometer for testing torpedo lines, yacht compass and barometer combined, radiometer with interchangeable fluid envelope, exhibited by Alfred Apps; warning compass, the Captain not on deck is warned by alarm bell if the ship deviates from course, exhibited by Henry Augustus Severn; model of a developable surface, exhibited by Harry Hart; artificial siliceous stalactites, exhibited by Messrs E. A. Pankhurst and J. l'Anson.
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