Artificial manures; their chemical selection and scientific application to agriculture . es of theMesemhrianthevium crystallinum, which is used in the island ofTeneriffe for the extraction of soda, are covered with glands, filledwith a solution of soda oxalate, which disappears, and gives placeto potassic oxalate in proportion as the place of its growth becomesremoved from the vicinity of the seashore. The venerable M. de Gasparin mentions another plant in whichthe substitution of potash for soda takes place still more completelywithout any evil effects. It seems that the Salsola tragus, which
Artificial manures; their chemical selection and scientific application to agriculture . es of theMesemhrianthevium crystallinum, which is used in the island ofTeneriffe for the extraction of soda, are covered with glands, filledwith a solution of soda oxalate, which disappears, and gives placeto potassic oxalate in proportion as the place of its growth becomesremoved from the vicinity of the seashore. The venerable M. de Gasparin mentions another plant in whichthe substitution of potash for soda takes place still more completelywithout any evil effects. It seems that the Salsola tragus, whichis used as a source of soda between Frontignan and Aigues Moits,is found far up the valley of the Rhone. It has just as vigorousan appearance when growing in the most inland locality as on theseashore, and that, too, in spite of its containing nothing but potash,the soda having entirely disappeared.^ It would seem to result ^Thenard, Chimie, iii., p. 141. -De Gasparin, Cours d Agriculture, 3rd edition, vol. i., p. 14G. THEORETICAL EXPERIMENTS ON THE GROWTH OF PLANTS IN CALCINED
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