-
- The Spectator, 25 April 1868
- Year: 1868
-
- The Spectator, 19 October 1889
- Year: 1889
-
-
-
-
- The Spectator, 21 December 1889
- Year: 1889
-
- The Spectator, 31 May 1890
- Year: 1890
-
- The Spectator, 30 November 1889
- Year: 1889
-
- The Spectator, 28 September 1889
- Year: 1889
-
- The Spectator, 2 May 1868
- Year: 1868
-
- The Spectator, 26 April 1890
- Year: 1890
-
- The Spectator, 31 August 1889
- Year: 1889
-
- The Spectator, 21 June 1890
- Year: 1890
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-
-
- The Spectator, 11 January 1890
- Year: 1890
-
- The Spectator, 5 October 1889
- Year: 1889
-
- The Spectator, 26 October 1889
- Year: 1889
-
- The Spectator, 23 November 1889
- Year: 1889
-
- The Spectator, 6 September 1890
- Year: 1890
-
- The Spectator, 25 April 1868
- Year: 1868
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 19 October 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 23 October 1890
- Year: 1890
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- Scientific American (Supplement), 18 October 1890
- Year: 1890
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- Scientific American (Supplement), 8 November 1890
- Year: 1890
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- The Spectator, 21 December 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 31 May 1890
- Year: 1890
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 30 November 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 28 September 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 2 May 1868
- Year: 1868
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 26 April 1890
- Year: 1890
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 31 August 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 21 June 1890
- Year: 1890
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 4 October 1890
- Year: 1890
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- Scientific American (Supplement), 29 January 1881
- Year: 1881
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- The Spectator, 11 January 1890
- Year: 1890
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 5 October 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 26 October 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 23 November 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 6 September 1890
- Year: 1890
- Publisher: The Spectator
- Language: English
- Place of Publication: London