HINTS AND EXPERIMENTS 199 



When growing plants in moss and humogen ex- 

 tract sterilize the moss. 



When possible mix humogen with the soil. 



Treat the plants with humogen from the seed-leaf 

 stage. 



When using moss, water once a week with a coffee- 

 coloured extract of humogen. Use plain water at 

 other times. 



When using as a top-dressing incorporate the 

 humogen as deeply as possible in the soil. 



When preparing the ground lightly dig in the 

 humogen some few days before sowing. 



Apply humogen to the land early, so as to give 

 the bacteria time to multiply in the soil while it 

 is moist. 



On poor ground use at least 10 cwt. per acre. 



For kitchen garden crops it pays to use liberally. 

 Eight to ten pounds per rod should suffice. Roses 

 and flower borders the same. 



If you wish to co-operate in advancing soil bac- 

 teriology keep accurate accounts of all you do, and 

 especially measure the humogen employed and the 

 resulting produce. The model experiments are a 

 guide how to keep results. 



Remember if you don't get results to write direct 

 to Mr. Alfred Machen, 48, Frances Road, Windsor, 

 giving full details of what you have done. Either 

 failure is due to avoidable error, or your experience 

 will help to advance knowledge. 



