Collation: 32 p. ; 18 cm.
Notes: A lecture delivered before the Sunday Lecture Society on Sunday afternoon, 28th February 1875. Printed by C.W. Reynell. From the library of Dr Moncure Conway and part of the NSS pamphlet collection.
Place of publication: London
Collation: 30,  p. : ill. (diag.) ; 18 cm
Series: no 29
Notes: Publisher's series list on unnumbered pages at the end. A list of published pamphlets by the same author listed on title page verso.