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'Rainbow Cup' scientific toy

'Rainbow Cup' scientific toy

1911-1930
Charles Vernon Boys' Original Gravitational Apparatus, 1889

Charles Vernon Boys' Original Gravitational Apparatus, 1889

1889
'Rainbow Cup' scientific toy

'Rainbow Cup' scientific toy

1911-1930
Quartz Fibres by Sir Charles Vernon Boys, 1887-1892

Quartz Fibres by Sir Charles Vernon Boys, 1887-1892

1887-1892
Arrow used with Original Boys' bow for Shooting Quartz Fibres, 1887

Arrow used with Original Boys' bow for Shooting Quartz Fibres, 1887

1887
Ellipsograph by Sir Charles Vernon Boys, c 1880-1920.

Ellipsograph by Sir Charles Vernon Boys, c 1880-1920.

1880-1920
Instructions for "The Rainbow Cup" educational toy

Instructions for "The Rainbow Cup" educational toy

1911-1930
Boys' Radiomicrometer, 1887-1900

Boys' Radiomicrometer, 1887-1900

1887-1900
Ten Photographs in one Frame Illustrating Flying Shot & Bullets

Ten Photographs in one Frame Illustrating Flying Shot & Bullets

1892
Model of a polar planimeter

Model of a polar planimeter

1880-1882
Boys' original 'Rainbow Cup'

Boys' original 'Rainbow Cup'

1911
Length of Boys' Quartz Fibre in Display Case, 1887-1892

Length of Boys' Quartz Fibre in Display Case, 1887-1892

1887-1892
Fluorescent Alcohol Thermometer by C. V. Boys, 1880-1885

Fluorescent Alcohol Thermometer by C. V. Boys, 1880-1885

1880-1885
Fluorescent Alcohol Thermometer by C. V. Boys, 1880-1885

Fluorescent Alcohol Thermometer by C. V. Boys, 1880-1885

1880-1885
Model of a machine for solving equations

Model of a machine for solving equations

1875-1885
Arrow used with the Original Boys' Bow for Shooting Quartz Fibres, 1887

Arrow used with the Original Boys' Bow for Shooting Quartz Fibres, 1887

1887
Six small pieces of quartz rod

Six small pieces of quartz rod

1887-1892
Fluorescent Alcohol Thermometer by C. V. Boys, 1880-1885

Fluorescent Alcohol Thermometer by C. V. Boys, 1880-1885

1880-1885
Boys fluorescent alcohol thermometer

Boys fluorescent alcohol thermometer

1878
2 Boys straight single-spiral fluoroscent alcohol thermometers

2 Boys straight single-spiral fluoroscent alcohol thermometers

1878
Fluorescent Alcohol Thermometer by C. V. Boys, 1880-1885

Fluorescent Alcohol Thermometer by C. V. Boys, 1880-1885

1880-1885
Boys circular spiral fluorescent alcohol thermometer

Boys circular spiral fluorescent alcohol thermometer

C.V. Boys' integraph with case

C.V. Boys' integraph with case

1880-1885
Boys' original bow with arrow for shooting quartz fibres (in wooden frame)

Boys' original bow with arrow

1887-1892
Boys' original lightning camera, made by Boys in 1900

Boys' original lightning camera

1900
Boys' gas calorimeter, by A. Gallenkamp & Co. Ltd., London, England, 1905-1923. Complete with governor but without meter. 2 reading lenses and small measuring cylinder missing. (see part records)

Boys' gas calorimeter

1905-1923
Boys' torsion balance by Cambridge Scientific Instrument Co., 1889.

Boys' torsion balance and components

1889
[Miscellaneous technical drawings (3) relating to C.V. Boys' recreation of the Cavendish experiment / C.V. Boys. ca.1888. 3 sheets : line drawings, pencil drawing. One bears ms. annotations, one shows plan and side view of dummies and note 'Dummies not used', one shows plan and side elevation of room]

[Miscellaneous technical drawings (3)]

circa 1888
Boy's apparatus for determining the mechanical equivalent of heat by The Cambridge Scientific Instrument Company, Cambridge, England, 1884. From The Physical Laboratory of the Science and Arts Department, South Kensington.

Boy's Mechanical Equivalent of Heat Apparatus, 1884

1884
Boys radio-micrometer made in 1907 by, The Cambridge Scientific Instrument Co. Ltd., Cambridge, England, no.5426 with wooden box (sighting tube and several nuts missing)

C V Boys' radio-micrometer, with outer casing removed, 1907.

1907
[Technical drawings (3) of 'optical compass' used by C.V. Boys in his recreation of the Cavendish experiment / C.V. Boys. ca.1888. 3 sheets, line drawings with wash; 2 bear ms. annotations; all 3 bear, in pencil, 'Opt. Compass'. No scale]

[Technical drawings (3) of 'optical compass']

circa 1888
Photograph of Boys' original moving-lens camera, 1900, for photographing lightning flashes

Photograph of Boys' original moving-lens camera

1900
[Ms. observations (24p.) taken by C.V. Boys during his repetition of the 'Cavendish experiment'. 1890s]

[Observations taken during Boys' repetition of the 'Cavendish experiment']

1890-1899
Two models showing the principle of the disc cylinder integrator, designed by C.V. Boys c. 1881

Two models showing the principle of the disc cylinder integrator

1880-1882
[B & w photos (18) of C.V. Boys's apparatus used in repeating the 'Cavendish experiment' at the Clarendon Laboratory, Oxford. 12 photos are mounted on board, one on card. All but one show the apparatus as set up in the basement of the Clarendon Laboratory]

Black and white photos of Boys's apparatus used in repeating the 'Cavendish experiment' at the Clarendon Laboratory

circa 1890
[Portfolio of result traces, summaries of results, notes etc. re repetition by Boys of the 'Cavendish experiment' / C.V. Boys. 1891-1894. Comprise leaves of trace results numbered 1-5 (Sept-Oct 1892) and 10-24 (Aug 1893-Jan 1894), plus 7 other, unnumbered leaves dated 1891-2. With 10 separately clipped together sets of ms. notes, one of which includes letters from A.G. Greenhill (2) and J.H. Poynting (1), all of May 1894, and is prefaced by a 1-page 'History' of the experiment, a chronology chiefly (but briefly) covering 15 Sept 1892 to 13 Jan 1894. Several of the sets of notes make reference to specific numbered experiments as they appear on certain book pages, probably those of his three notebooks, inv. no. 2000-1186 (MS 443)]

Portfolio of result traces and notes etc. re repetition by Boys of the 'Cavendish experiment'

1891-1894
[Letter (holograph signed)] 1929 Apr 3, St. Mary Bourne, Andover [to] Robert Whipple / C. V. Boys, re prisms. 2p. on 1 leaf. Boys 'can't very well show my solid prisms again at the R. Soc. soirees' as he 'had them there last May & June and I had a Dent's dipleidoscope'. He suggests Whipple could 'show your collection of 5 and you might have my 2 also ...'. The one Whipple let him borrow is interesting; Boys judges it 'to be an earlier attempt of Bloxam's. It is not so good in any respect as is hollow prism'. He then goes on to describe the theory and manufacture (with sketch)]

Letter (holograph signed) 1929 Apr 3

1929
[Sketches, with notes, re apparatus used in his repetition of the 'Cavendish experiment'/C.V. Boys. c.1890-1895]

[Sketches, with notes, re 'Cavendish experiment' by C.V. Boys]

circa 1890-1895
[Original sketches of the apparatus used by C. Vernon Boys in his repetition of the "Cavendish Experiment" / C.V. Boys. 1888. Bears numerous pencil sketches and notes. See also 1922-501 (MSL 19/2): the first series of observations, taken by H.E. Hadley. With envelope (MSL 19/3) bearing ms. note re 1922-500 & 501]

Original sketches of the apparatus used by C. Vernon Boys in his repetition of the "Cavendish Experiment"

1888
[Ms. notebooks (3) kept by C.V. Boys whilst repeating the 'Cavendish experiment' at the Clarendon Laboratory, Oxford. 1890 Nov-1894 Apr. Each vol. bears label on front board offering a reward if found and returned to 'C.V. Boys, Royal College of Science, South Kensington or Clarendon Laboratory, Oxford']

Ms. notebooks (3) kept by C.V. Boys whilst repeating the 'Cavendish experiment' at the Clarendon Laboratory

1890-1894
[Ms. note] 1900 Jul 25 [to] W.J. Hill, S. Ken. Museum, [re 'Cavendish experiment' apparatus and 'Radiomicrometer']/C.V. Boys. [With notes (1p. ms.) by Boys re 'Cavendish experiment' and 'Radiomicrometer'; also with ts. transcription of both]

[Ms. note to Mr Hill of the S. Ken. Museum from C.V. Boys]

1900