MANURING EN THEORY AND PRACTICE. 



173 



Fig. 12.— Experiments in Water-culture (by Dr. Nolle) at the Experimental Station in Thar.mdt, Saxony. 



The above engraving is copied from photographs o F Buckwheat plants, grown with the roots immersed in jars containing 

 various solutions of the ingredients of plant-food in water. The plants were supported by perforated corks restinsr 

 on the covers of the jirs, and by upright sticks. In jars I. and La was a normal solution, that is, a solution containing 

 all the essential ingredients of plant-food, including potassium as chloride. The solution in II. was the same as 

 the normal solution in I. and I.a, except that potassium was omitted in the jar II. The jar II. 3 commenced as II., 

 that is, without potassium, but potassium chloride was afterwards added. VI. contained the normal solution, 

 except t>iat sodium was substituted for potassium. IX , X., XL, and III., same as I., except that IX. contained 

 no lime, X. no chlorine, and XI. no nitrogen, and III. had nitrate instead of chloride of potassium. 



There seems no reason, moreover, why "beauty and 

 usefulness should not go hand in hand, and why the 

 florist, as well as the gardener, should not seek for 

 aid from sewage. Roses especially should repay 



cultivation remarkably well, considering their love 

 of ammoniacal dressings, and ahundant luxuriance 

 and blonm would almost certainly reward the florist's 

 efforts in this direction." 



