198 



PROCEEDINGS OF THE CHEMICAL DEPARTMENT. 



Coarse Sand, 

 Fine Sand, 

 Clay, 

 Organic Matter, 



Mechanical Analysis. 



100-000 100-000 



SOIL FROM MR HARPER, SNAWDON, GIFFORD. 



This soil, which lies very high, differs greatly in its appear- 

 ance from the others. Its colour is pale yellowish brown, with 

 a grey shade. It contains more than a fourth of its weight of 

 gravel, consisting partly of rounded stones, which look like a 

 disintegrated trap, and angular fragments of an indurated clay 

 slate. The subsoil, which is extremely light in colour, consists 

 to a still larger extent of gravel. It contains one-third of its 

 weight, and the whole of this is clay slate in angular fragments. 

 Notwithstanding its pale colour, it contains a large quantity of 



organic matter. 



Soluble in Acetic Acid. 



Peroxide of Iron, 

 Alumina, . 

 Lime, 



Magnesia, . 

 Potash, 

 Soda, 



Sulphuric Acid, 

 Chlorine, . 

 Phosphoric Acid, 



0-080 



Total Soluble in Acetic Acid, 0"670 1-019 



Soluble in Hydrochloric Acid, but Insoluble in Acetic. 



Silica, 



Peroxide of Iron, 



Alumina, 



Lime, 



Magnesia, 



Potash, 



Soda, 



Sulphuric Acid, 



Phosphoric Acid, 



Carbonic Acid, 



Total Soluble in H CI, 



6-650 



8-465 



Insoluble in Acids. 



Silica, 



Peroxide of Iron, 

 Alumina, . 

 Lime, 

 Magnesia, 

 Alkalies and Loss, 



Total Insoluble in Acids, 



84-080 81-516 



