AS A MANURE FOR POTATOES. 367 
foreign and distant regions. Should a state of 
war occur, the difficulty in procuring Guano 
might be insurmountable. 
The formula, now commonly known as Dr. 
Liebig’s compost, for furnishing inorganic mat- 
ters to wheat, barley, &c., is a step in advance 
towards the accomplishment of this object. This 
compost, by admixture with night-soil, will sup- 
ply the land with the silicate of potass, which is 
wanting in human excrement; and also in Guano. 
Various attempts have been made in England, 
and on the Continent, to consolidate the night-soil, 
and prevent its ammoniacal contents from escap- 
ing; but Liebig states, that the method adopted 
for that purpose on the Continent, is defective : 
this I believe is also the case in this country. 
I intended to make some remarks on the far- 
. dnaceous properties of the potatoe, but as the 
experiments, now in progress, have become more 
extensive than I anticipated, their results, with 
any observations which I may think interesting, 
will be communicated to the society, before the 
expiration of the present session. 
