the Progress of English Agriculture. 829 = 563 
c. Phosphatic guanos : 
Mejillones guano ; Patagonian and Falkland Island guano ; 
atos Island guano ; Raza Island, or Gulf of California guano ; 
uraqao guano ; Quito Serrano guano ; Petrel Island guano ; 
oral Island guano ; Boobj Island guano ; McKeen's Island 
jano ; Baker's Island guano ; Rowland Island guano ; Jarvis 
land guano ; Bird's Island guano ; Maiden Island guano ; Shaw's 
land guano ; Flint Island guano ; Enderbury guano ; Starbuck 
land guano and Lacepede Island guano. 
Full descriptions of these guanos and phosphatic minerals, 
ith their analyses, will be found in the ' Journal of the Royal 
igricultural Society' for 1875 and 187G. 
2. Nitrogenous manures : — Nitrogenous 
Peruvian guano ; nitrate of soda ; sulphate of ammonia ; gas- 
fuse ammonia (crude and patent ammonia). Dried blood ; wool- 
fuse (shoddy). Dried-flesh refuse and similar animal matter 
"fuse from the manufacture of meat-extract in South America 
'id Australia). Horn-shavings. 
3. Saline alkaline materials : — Saline alkaline 
Kainite and Stassfurth crude potash-salts of various strengths. 
)mmon lead salt, fishery salt, and nitre-refuse salt. 
manures. 
materials. 
Both raw and dissolved Peruvian guano are largely used by Uses of ma- 
e farmers of Great Britain. Of late years the consumption of "^''"'^^ ^'^^^ 
trate of soda has been very much increased, and many farmers 
iw use it largely as a top-dressing for wheat and barley. For 
e latter crop it is usually employed in conjunction with super- 
losphate of lime, 2 to 3 cwts. of superphosphate, or to 2 
rts. of nitrate of soda being considered a good dressing per acre. 
Nitrate of soda has also been used of late years in England 
th considerable advantage, in addition to dissolved bones, or 
mixture of superphosphate and guano, and some salt, as a 
mure for mangolds. A dressing of 1^ cwt. of nitrate of 
!;ia, 3 cwts. of Peruvian guano, 2 cwts. of superphosphate, and 
1 3wts. of salt per acre, is considered a somewhat heavy but 
"ll-paying manure for mangold-wurzel. 
Potash-salts are not much used in England for manuring 
) rposes. Experience has shown that, on the great majority oi 
uls in a fairly good agricultural condition, the addition of 
tash-salts to other artificial manures produces no decidedly 
neficial effect upon the crops to which it is applied. On poor 
idy land, and on worn-out pastures and peaty soils, however, 
tash-salts, in conjunction with dissolved bones, or superphos- 
ate, or mixture of superphosphate and guano, have been used 
England, as in other countries, with marked beneficial 
