Specification of Louis Emile Ossian Degrand : lenticular glasses for the lighting and reflecting.
Degrand, Louis Emile Ossian.
London : Printed by George E. Eyre and William Spottiswoode, printers to the Queen's Most Excellent Majesty: Published at the Great Seal Patent Office, 25, Southhampton Buildings, Holborn,
1857.
Lighthouses
Lenses
England London.