-
- The Spectator, 11 July 1891
- Year: 1891
-
-
- The Spectator, 13 June 1868
- Year: 1868
-
- The Spectator, 1 August 1891
- Year: 1891
-
-
-
-
- The Spectator, 31 October 1891
- Year: 1891
-
- The Spectator, 18 July 1868
- Year: 1868
-
- The Spectator, 11 July 1868
- Year: 1868
-
- The Spectator, 24 October 1891
- Year: 1891
-
- The Spectator, 12 March 1892
- Year: 1892
-
- The Spectator, 29 August 1891
- Year: 1891
-
-
-
-
- The Spectator, 28 March 1868
- Year: 1868
-
- The Spectator, 6 April 1889
- Year: 1889
-
- The Spectator, 13 July 1889
- Year: 1889
-
- The Spectator, 27 July 1889
- Year: 1889
-
- The Spectator, 11 July 1891
- Year: 1891
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 31 January 1891
- Year: 1891
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- The Spectator, 13 June 1868
- Year: 1868
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 1 August 1891
- Year: 1891
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 21 February 1891
- Year: 1891
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- Scientific American (Supplement), 24 January 1891
- Year: 1891
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- Scientific American (Supplement), 7 February 1891
- Year: 1891
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- The Spectator, 31 October 1891
- Year: 1891
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 18 July 1868
- Year: 1868
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 11 July 1868
- Year: 1868
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 24 October 1891
- Year: 1891
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 12 March 1892
- Year: 1892
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 29 August 1891
- Year: 1891
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- Scientific American (Supplement), 14 March 1891
- Year: 1891
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- Scientific American (Supplement), 21 March 1891
- Year: 1891
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- Scientific American (Supplement), 24 December 1881
- Year: 1881
- Publisher: Scientific American
- Language: English
- Place of Publication: New York
-
- The Spectator, 28 March 1868
- Year: 1868
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 6 April 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 13 July 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London
-
- The Spectator, 27 July 1889
- Year: 1889
- Publisher: The Spectator
- Language: English
- Place of Publication: London