CHAPTER XIII.

To Upgang--Enter Cleveland--East Row--The first Alum-Maker-- Sandsend--Alum-Works--The huge Gap--Hewing the Alum Shale-- Limestone Nodules: Mulgrave Cement--Swarms of Fossils--Burning the Shale--Volcanic Phenomena--From Fire to Water--The Cisterns-- Soaking and Pumping--The evaporating Pans--The Crystallizing Process--The Roching Casks--Brilliant Crystals--A Chemical Triumph --Rough Epsoms 97