2 v. : 80 leaves of plates ; 36 cm. Cover title. In portfolio. This collection of 156 different forms of crystals was produced by microphotography. Professor T.H. Schenk, of Austria, experimented several years in order to bring about interesting designs through the action of acids on various metals... --Pt. 2., cover page verso. Pt. 1. Nature -- Pt. 2. Crystal forms. Library has Pt. 2 only ; Plates: 1-20.https://digitalcommons.risd.edu/specialcollections_books_nature/1003/thumbnail.jp
