AGRICULTURE AND DENDROLOGY. 
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I. Nitrogen, in the finest steamed bone dust, fish 
manure, oil-cakes, poudrette, and in 
all superior kinds of artificial guano 1.20-1.40 
„ in granular or finely splintered sorts 
of bone dust, horn meal, and wool 
dust. 1.00-1.20 
„ in coarse fragments of bones and 
horn, woollen rags, human excreta, 
stable dung, etc.0.80-1.00 
II. Phosphoric acid, soluble in water, such as in 
superphosphates .0.70 
„ in Peruvian guano and precipitated 
phosphates .0.60 
., in the finest steamed bone dust, fish 
meal, poudrette, and as “reverted ” 
phosphoric acid .0.50 
,, in the raw Baker guano and in most 
other natural guanos poor in nitro¬ 
gen, also in wood ashes.0.44 
,, in granular or finely splintered bone 
dust, finely powdered animal char¬ 
coal, and in bone ash .0.40 
,, in raw fragments of bones, human 
excreta, farm yard manure, powdered 
phosphorites, Thomas phosphate 
powder, coprolites, and other ferru¬ 
ginous phosphates, raw refuse from 
various materials of manufacturing 
processes .0.30 
III. Potash, loco Stassfurt, in raw minerals ... 0.12-0.16 
,, ,, ,, in purified salts ... 0.24-0.36 
In addition to this we may quote the trade values agreed 
upon by the experiment stations of Connecticut, New Jer¬ 
sey, and Massachusetts, for the year 1887 : 
