GEOLOGICAL AND BOTANICAL REMARKS.

61

to dry destillation, found in it carbonate of ammonia. The arable soil of this district is of a reddish hue and chiefly consists of sand. Professor Scbübier who analyscd it che-

mically, found in a hundred parts of it:

Quartz sand.77,0

Clay, with traces of Oxide of iron . . 20,1

Carbonate of liine.1,3

Humus (Ulmine), extractivc with potash 0,1

Substanees volatilizcd by red beat . . 1,2

99,7

One cubic inch of it, in a dry state, weighcd 454 grains, when moistened the weight increased to 622 grains. Its consistency, when dry, was but 6,8, —clay bcing takcn as a Standard, =100. From tbese dates it must become evident tliat this soil is cxtremely light ; howcver fine firs, and, along the slopes of the hills, excellent rye is grown on it.

The most remarkable minerals found in the neigh- bourhood, are the following:

Fluorspar, crist.; in the variegated sandstone near Neuenbürg.

Bituminous quartz ( Slinkquartz ); var. sandst., near Calmbach.

Horny quartz ( Hornsleiri)\ granite; Wildbad.

Silicious fieldspar (Albile ); gran.; Wildbad.

Oxide of manganese ( Pyrolusite ), crist.,

Manganite,

Wad ( Brauneisenrahm ),

Red iron ore {Rolheisenocker),

Lepidokrokite,

Brown iron ore (fibrous and compact Brauneisenstein ),

Carbonate of iron, (Eisenspath) , crist.; in the clayey sandstone near Neuenbürg;