FIG. 17 



The number of blooms thrown and the size and colour of the individual 

 blooms are the main results obtained by the application of humogen 

 to the primula. The above photograph shows two specimens of 

 Primula Keivensis. Both were planted in ordinary potting compost, 

 but the one on the right was watered continually with humogen 

 extract, while the one on the left was watered with guano extract. 

 (Grown at the Royal Gardens, Kew.) 



