168 
* 20 tons per acre may be obtained. The green root has yielded 
* 11:46 per cent. of tanning, and the dry material 31:62 per cent. A 
* peculiar feature of the roots is that they contain 18 to 20 per cent. 
Foreign Office Report (No. 1336, Annual Series, 1894), furnished 
by e Horace D. Nugent, Her Majesty's Consul at Galveston 
(pp. ! 
E ies is a tanning agent. It isa species of sour dock, and the 
dried root contains about 331 per cent. of tannic- acid, or a highe 
average than the very best oak bark. It grows wild on most of the 
New Mexican plains or ‘ mesas; and in that state yields from one ton 
io four tons to the acre, and in rare instances, five tons. Under very 
simple cultivation and scanty irrigation the veld is at least 10 tons 
per acre, and it will average 10 tons to 20 tons. The United States 
experiment station attached to the Agricultural College at La Cruces 
has two fields planted now, one irrigated, the other r dry. The habits 
and evolution of this plant from the wild to the cultivated state are 
being closely watched and recorded. At Deming, extracting works 
have been erected, and the product i is being shipped to several tanneries 
in the United States and England.’ 
and odour characteristic of natural spawn, and when placed in a 
mushroom-bed grows and arme mushrooms normally. 
I. The production of a Pure Spawn or Mycelium.— At present 
cultivated mushrooms are subject - AS diseases, the germs of 
which are introduced along with the 
IL Choice of Varieties. .— Certain Mr especially the one having 
the cap entirely white, are most esteemed in the market. B the 
method described, it is practicable to perpetuate 2 vem variety in 
a Lie state, a condition not possible by any other m 
IL. Permanent production of Spawn.— At peat the produetion of 
spawn is intermittent; by the culture process spawn can be produced 
throughout the year, which is an obvious advantage. 
The authorities hope to apply the same method to the cultivation of 
other edible species, as the Boletus and Mor 
