{ _Common salt_. { { { _Borax_. { { { { Potash. _Nitre_. { { { { Ammonia. _Sal─ammoniac_. { { { Sulphur. _Sulphur_. { { { { { _Naphtha_. { III. COMBUSTIBLES { Bitumen. { _Coal_. { { { _Jet_. { { { { Graphite. _Black─lead_. { { { { Resin. _Amber_. { { { Platina. _Platina_. { { Gold. _Gold_. { { Mercury. _Mercury_. { { Silver. _Silver_. { { I. MALLEABLE. { Copper. _Copper_. { { { Iron. _Iron_. { { { Tin. _Tin_. { { { Lead. _Lead_. { IV. METALS. { { Nickel. _Nickel_. { { Zinc. _Zinc_. { { { Arsenic. _Arsenic_. { { Bismuth. _Bismuth_. { II. BRITTLE. { Cobalt. _Cobalt_. { Manganese. _Manganese_. { &c. &c. 13.To complete a general view of the different productions of the mineral kingdom, it is requisite to subjoin a tabular arrangement of the various kinds of _rocks_.