-
- The Spectator, 5 May 1894
- Year: 1894
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-
- The Spectator, 10 October 1868
- Year: 1868
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-
- The Spectator, 24 March 1894
- Year: 1894
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-
-
-
- The Spectator, 29 September 1894
- Year: 1894
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- The Spectator, 8 September 1894
- Year: 1894
-
- The Spectator, 10 March 1894
- Year: 1894
-
- The Spectator, 17 February 1894
- Year: 1894
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-
- The Spectator, 1 September 1894
- Year: 1894
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-
- The Spectator, 3 October 1868
- Year: 1868
-
- The Spectator, 28 April 1894
- Year: 1894
-
- The Spectator, 2 June 1894
- Year: 1894
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-
-
- The Spectator, 5 May 1894
- Year: 1894
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 30 January 1892
- Year: 1892
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- The Spectator, 10 October 1868
- Year: 1868
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 20 August 1892
- Year: 1892
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- The Spectator, 24 March 1894
- Year: 1894
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 21 January 1882
- Year: 1882
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- Scientific American (Supplement), 9 January 1892
- Year: 1892
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- Scientific American (Supplement), 5 December 1891
- Year: 1891
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- The Spectator, 29 September 1894
- Year: 1894
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 8 September 1894
- Year: 1894
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 10 March 1894
- Year: 1894
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 17 February 1894
- Year: 1894
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 12 March 1892
- Year: 1892
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- The Spectator, 1 September 1894
- Year: 1894
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 21 May 1892
- Year: 1892
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- The Spectator, 3 October 1868
- Year: 1868
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 28 April 1894
- Year: 1894
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 2 June 1894
- Year: 1894
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 6 February 1892
- Year: 1892
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
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- Scientific American (Supplement), 11 June 1892
- Year: 1892
- Publisher: Scientific American
- Language: English
- Place of Publication: New York