360 APPENDIX F. 



week it came to a stand. A lived till gathered on September 27 ; 

 height 15 centimetres, length of roots 82 centimetres. Plants o 

 and D received on July 1-1 each 0'2 gramme nitrate of ammonia, 

 and on July 17, also, the same quantity. The influence of this 

 salt was rapidly visible. On August 4, c and D received normal 

 solution. Plant c was gathered on September 27, height 75 centi- 

 metres. Plant D, gathered on November 15, was in a healthy state, 

 and had attained a height of 120 centimetres. 



V. Experiments without soda. Commencement June 10. The 

 early vegetation was very luxuriant ; in the end of July, however, 

 the plants were not progressing. On August 4, the plants received 

 normal solution ; two died, but A and B made further progress. 

 A and B were gathered on October 30, height of A, 205 centi- 

 metres ; B stunted. 



VI. Experiments without lime. Commencement June 10. 

 Plant A had reached a height of 2 centimetres on July 17; but 

 made no further progress. B received on July 1, O'l gramme lime 

 in the form of nitrate, and on August 4, normal solution, vigor- 

 ous growth. It had on November 15 four stems respectively 107, 

 95, 75, 70 centimetres high, which were covered with leaves, and 

 had eight well developed heads of fruit. 



VII. Experiments without magnesia. Commencement June 

 10. Progress as in Experiment VI., and gathered as it was mak- 

 ing no visible progress. B and o received on July 17, O'l gramme 

 magnesia, and on August 4 normal solution, gathered September 

 27; height of B, 23 centimetres; of c, 42 centimetres. Both had 

 male flowers without pollen, and no female flowers. 



On comparing his experimental plants with those which grew 

 in the ground, both in respect to weight of the crop and to amount 

 of ash and its composition, Stohmann concluded that we may in- 

 deed convert a plant of maize into a water-plant, but that maize 

 cannot grow in a normal condition in solutions of its food. Fur- 

 ther, his experiments showed in a positive manner that the soil 

 played a determinate part in the nutriment of plants absorption 

 of alkalies and that plants in the absorption of their food must 

 themselves take an active part (compare Henneberg's ' Journal fiir 

 landwirthschaft, 1862,' s. 1. and 'An. der Chem. und Pharm.,' bd. 

 cxxi. s. 285). 



APPENDIX F (pp. 114, 115). 



EXPERIMENTS ON THE GROWTH OF BEANS IN POWDERED 

 TURF. 



To complete the experiments on vegetation described at page 

 112, the results of the. entire crops are now given in the following 

 table : - 



