| Description | List of exhibits at the Royal Society's conversazione at Burlington House, arranged by room. Headed 'Burlington House. March 6th 1869'. Inscribed in red pencil verso: '1869 March'. Items and exhibitors were as follows:
Linnaean Library.
Various studies by Leonardo da Vinci, from the Royal Collection, exhibited by permission of H.M. The Queen.
Oil painting. The freshwater fishes of Great Britain, by [Henry Leonidas] Rolfe. Exhibited by Mr, Henry Lee.
Head of bison from British Columbia. Exhibited by Mr. A. G. Dallas.
Tisiphonia carpenter, and other specimens of marine zoology dredged from 530 and 560 fathoms in the North Atlantic. Exhibited by Dr. [William Benjamin] Carpenter.
Inscribed bullock's hide, supposed to be a message from the interior of Somali-land. Exhibited by the Royal Geographical Society.
Model of a hydraulic coal-breaking machine: to dig coal without the use of gunpowder. Invented and exhibited by Mr. G. P. [George Parker] Bidder, Junior.
Model of a patent excavating apparatus, for use in digging-operations &c. under water. Invented and exhibited by Mr. J. [John] Milroy.
Model of improved switches for railway junctions, obviating the use of facing points. Cyclograph; an instrument for setting out railway curves. Exhibited by Mr. R. [Richard] Price Williams.
Bust in marble of Sir Bartle Frere, by [Thomas] Woolner. Exhibited by the sculptor.
Applications of the spectrum microscope to mineralogy. Remarkable specimen of Jargonia. New applications of the microscope to blowpipe chemistry. Exhibited by Mr. H. C. [Henry Clifton] Sorby.
Fluid-cavities and crystals enclosed in rubies, sapphires, and diamonds. Exhibited by Mr. P. J. Butler.
Crystals of diamond, and large diamond in its native rock. Exhibited by Messrs. Blogg and Martin.
Specimens of salmon-ladders; cast of a salmon coloured to life; and specimens of young oysters. Exhibited by Mr. F. T. [Frank Trevelyan] Buckland.
Linnaean Meeting Room.
Patent balance-weight steering signals. Preservative paint for all purposes. Invented and exhibited by Mr. F. N. [Frederic Newton] Gisborne.
Specimens of metal and stone illustrative of the phenomena of fracture. Exhibited by Mr. D. [David] Kirkaldy.
Magneto-exploder, by Breguet. New electric lamp with pneumatic action. Invented and exhibited by Mr. G. W. [George William] Wigner.
The A B C process for deodorizing sewage. Invented and exhibited by Messrs. [Robert George and William Cameron] Sillar and [George William] Wigner.
Burg's actinometer. New patent distance-measuring telescope. Absorption bands of gases shown by the spectroscope. Exhibited by Messrs. Elliott Brothers.
Holmes's magneto-alphabetical telegraph: a new patent, combining simplicity of construction and small cost. Invented and exhibited by Mr. N. J. [Nathaniel John] Holmes.
Improved Morse's ink-printing telegraphic instrument: Harling's patent. Paraffine insulators for telegraphic posts: Brook's patent. Exhibited by the India-Rubber, Gutta-Percha, and Telegraph Company.
Wilder's A B C telegraph: in operation. Exhibited by Mr. Sax.
Improved safety lamp for use in mines. Invented and exhibited by Mr. T. Story Horn.
Dynamical diagrams in the wheel of life. Exhibited by Mr. J. [James] Clerk Maxwell.
Photographic views of the region of Mount Sinai. Exhibited by the Royal Geographical Society.
Meteorological diagrams: weather charts showing the recurrence of similar gales in January and December 1868. Isobaric curves, direction and force of wind at all the observatories at 8 a.m. during the gale, August 22 1868. Wind, weather, barometer and thermometer readings, during passage of R.M.S. 'Sidon' from Liverpool to New York and back. Exhibited by the Meteorological Office.
Entrance Saloon.
Specimens of minerals and fossils of Euplectella. Inlaid vases and Florentine work. Exhibited by Prof. [James] Tennant.
Byzantine drawings, from Moscow. Exhibited by Mr. J. Leighton.
Patent Norwegian heat-retaining (or cooking) apparatus, for every-day use, for hospitals, military and exploring parties, &c. New pocket filter; Lord's patent; and other ready contrivances for filtering. Exhibited by Messrs. Silver and Company.
Specimen of the first beet-root sugar manufactured commercially in England. Exhibited by Mr. A. W. Gadesden.
Demonstration of the expansion of palladium by hydrogenium. Exhibited by the Mater of the Mint [Thomas Graham].
Working models, showing the effect of the magneto-electric current in controlling and rendering synchronous the rotations of the armatures of a number of electro-magnetic induction machines. Exhibited by Mr. H. [Henry] Wilde.
Patent binocular microscopes and a 1/16 object-glass made on the immersion principle. Exhibited by Messrs. Powell and Lealand.
Photographs of Abyssinia, taken by the Royal Engineers during the march to Magdala. Exhibited by Mr. F. A. [Frederick Augustus] Abel.
Landscape and architectural water colour drawings, by J. H. [John Henry] Leonard. Exhibited by the artist.
Painting of the Sooloo Pass, Abyssinia. Exhibited by the Royal Geographical Society.
Council Room.
Pocket spectroscope, showing the D lines widely separated: plan proposed by Mr. J. N. [Joseph Norman] Lockyer. Finder for a large equatorial, mounted on a new plan, to insure its retaining adjustment. Powerful magneto-electric machine in action, showing quantity and intensity effects. Exhibited by Mr. J. [John] Browning.
The absorption of hydrogen by palladium in connection with the original circular-magnet magneto-electric machine. Large Nicol-prism polariscope. Vibrations of tuning forks as produced by electro-magnetism. Exhibited by Mr. [William] Ladd.
Photographic portraits. Exhibited by Messrs. Wilson and Beadell. Sketches in oil, from nature, in a new style. Exhibited by the artist, Mr. W. W. [William White] Warren.
Model of the Holborn Viaduct. Exhibited by the Metropolitan Board of Works.
Diagram views, drawings, and sketches of the Antarctic regions. Photographs of a model in relief of the colony of Victoria, Australia. Exhibited by the Royal Geographical Society.
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