I 9 o THE SPIRIT OF THE SOIL 



HIPPEASTRUM. Seedlings by the end of the 

 season had made bulbs two and a half times as heavy 

 as in the case of untreated plants. They were 

 therefore so much the nearer by that extent to the 

 flowering stage. 



HYACINTHS. Increase in the root action was well 

 marked. The foliage was rich in colour. The flower 

 spikes were heavier, and both colour and scent were 

 strongly intensified. The bulbs were heavier. 

 (Photo, p. 91.) 



IRESINE LINDENI. The purplish red attained in 

 the foliage was very striking. The growth obtained 

 was less remarkable, but the colouring was far more 

 intense, deeper, and richer. 



IRIS HISPANICA. Growth was more vigorous ; the 

 flowers were bigger, and matured a week earlier. 



ISOLOMA. Fine healthy plants were obtained far 

 larger than in the case of non-treated plants. Those 

 receiving humogen showed greatly increased root 

 action, much improved foliage, intensification of 

 flower coloration, and a notable symmetrical 

 development. 



JACOBINIA. Results were obtained similar to 

 those in the case of isoloma, but owing to the intensi- 

 fication of colouring the blue flowers made a striking 

 picture against the dark green foliage. 



LANTANA SABRIFOLIA. The rapidity of growth 

 obtained without spoiling balance was very marked. 

 The plants were more than double the size of those 

 not treated. 



LEONITIS LEONURUS. Symmetry, strongly pro- 

 moted root action, intensification of colour of foliage 



