354: 



APPENDIX E. 



perimental plant, with also fifteen leaves, and visible male flowers, 

 weighed 1260 grammes, that is to say, seven times as much as the 

 artificially reared plant. The stem of the garden plant from the 

 lower knot to the summit of the flower-stalk measured 150 centi- 

 metres, being three times the height of the experimental plant. 



V. Period. From August 1 to 10. At the commencement the 

 plant weighed 173 grammes ; the stem was 52 centimetres high ; 

 in the middle of the period the plant had fifteen large fine green 

 leaves, with a surface of 1420 square centimetres. In this period 

 double the quantity of water (2 litres) was exhaled, and as the 

 older roots were distinctly reddish yellow in colour, the plant re- 

 ceived no more phosphate of iron, but thrice as much phosphate 

 of potash as in the second period. On August 6 and 7, the male 

 flower, consisting of seven single ears, was fully expanded from 

 the sheath, the stem was strong, and 70 centimetres high. On 

 August 7, a fully formed female flower appeared ; on August 9, the 

 anthers began to shed their pollen. 



A 



Nitric acid 1-0800 



Sulphuric acid 0-2475 



Phosphoric acid 0-1875 



Lime 0-3420 



Magnesia 0'1165 



Potash 0-5927 



2'5662 



B 



-) 



0-164:0 

 0-0020 

 0-1236 

 0-0790 

 0-1894: 



0-5580 



Proportions between bases and acids, 

 CaO _ KO 



MgO " ' CaO = 

 CaO KO 



Given : 



Absorbed : 



MgO 



= 5-9; 



CaO 



S0 9 

 MgO 



S0 3 

 MgO 



0-0835 

 0-1855 

 0-2184 

 0-0370 

 0-4033 



0'9277 



= 2-1 



-2-3 



As the plant in this period flowered, and earlier experiments 

 had shown that maize dug up at the period of flowering, and 

 placed in river water furnished still ripe seeds, and also by the ad- 

 dition of the salts which the plant in each period had taken up in 

 proportion to its increase in weight in the first four periods, it ap- 

 peared that it must contain fully as much salts as the plant in its 

 normal condition in the field takes up, if placed from this period 

 Dnly in distilled water. 



VI. Period. From August 10 to 16. At the commencement 

 the plant weighed 255 grammes, and had 15 fully expanded leaves 

 with a surface of 2640 square centimetres : 2 litres of water were 

 exhaled. 



On August 10, the anthers had almost completely shed their 

 pollen. The stem shot up rapidly, and on the 12th it measured to 

 the tip of the flower 1 metre in height. On the 13th a second 



