352 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
Inspection of this table shows that the number of plants aad 
the total weight of the crop steadily fell with successive additions 
of humogen, while a light dressing of pig manure raised the total 
crop to nearly double that on the no-manure plot. The fall is 
due to the successively smaller number of plants that succeeded in 
establishing themselves with the successively heavier dressings of 
humogen. The lightest dressing gave a slight falling off in number 
and gross weight, but its effect was almost negligible. The weight of 
humogen added here was that recommended in the publications of 
the patentees. But heavier dressings proved more detrimental. 
It is not surprising that the average weight of the plants rose 
with the heavier dressings of humogen, for the plants on the plots 
had greater space, and, as we have shown elsewhere,* the greater the 
space available, the greater, within limits, the average weight of the 
plants. 
We can but conclude that humogen as available for our experiments 
in the latter part of 1914, and in 1915 and 1916, failed to justify its 
claim to great value as a manure. 
* Chittenden, F. J., " On the Influence of Planting-Distance on the 
Yield of Crops," Journal R.H.S. xli. p. 89. 
