84 M. Do Gasparin on the Classijication of Soils. 



We have altogether kept out of view the experiments of 

 Spasky and Kupffer on the artesian wells of Vienna, as there 

 is certainly some mistake, or rather, as Professor Bischof re- 

 marks, some militating cause, and he conjectures " that the 

 depths of these springs are not equal to the lowest point of 

 the course of the spring, but that the springs rise from a still 

 o-reater depth." 



Riidersdorf (Magnus and Erman), . • 1 in every 48.3 



Later cbservations, .... 1 51.2 



Still more recent, . • • • 1 54.1 



(Erzgebirge (Bischof), from observations on en- 

 closed waters, ^ "^•° 

 Monk Wearmouth, 1 59.7 

 Cornwall, from springs, 1 54.8 



^ Cornwall, from enclosed waters, . . . 1 52.7 



I Uralian Mountains, from a comparison of the 



I most authentic observations in these regions, 1 55.4 



\Rildersdorf, from rising springs, . . • 1 54.4 



Paris, Well at Port St Ouen, . . . 1 72.1 



•r. . J -vT J / Well of Marquette, 1 61. 



Departments du Nord, \ * 



^ , „ J /-, 1 • 1 ■ •• Aire, . . 1 41. 



et du Pas de Calais, / ' „ 



' ... St Vincent, 1 47. 



Shcerness, 1 '*^- 



Tours, 1 41.8 



Geneva (De la Rive et Marcet), . . . 1 50. 



Paris, Slaughterhouse of Greuelle, . . . 1 57.1 



Average, . 1 for evei^ 53.1 



Memoir on the Classification of SoilsA By M. De Gasparin. 



It is undoubtedly a matter of surprise, that in an art which 

 engages the attention of so many distinguished men, — which 

 is the great basis of national prosperity, and which excites so 

 many different energies, a name has not yet been devised for the 

 expression of the different qualities of earth which form the 



* Copied and reduced from Professor Bischof's paper on Thermal Springs, 

 t Report of a communication presented to the French Academy of Sciences, 



This Memoir is the first part of a work upon Agronomy, which is that brancli 



of the science of agriculture which has for its object the study of soils ; what 

 belongs to their susceptibility of cultivation, and to their relative value, is 

 reserved for another publication, the author confining himself on tlie pre- 

 •ent occasion to the consideration of their classification. 



