68 
On Bats^ Guano. 
Like bats' dung from other localities, that from Jamaica is 
likely to vary very much in composition. The sample analysed 
by me was poor in ammonia and not particularly rich in phos- 
phate of lime. 
Bats' Guano from Penang. 
In Penang Bats' guano bears the name " Typelawer." When 
pure it is held in high estimation as a manure by the planters ; 
but often, I am informed, Typelawer is much adulterated by 
the Chinese dealers. 
The only sample hitherto analysed by me had the following 
composition : — 
Moisture 10 "54 
*Organic matter 9 • 25 
Phosphate of lime 38-08 
Carbonate of lime 5 "69 
Sulphate of lime 13 '76 
Magnesia '78 
Alkaline salts, including 2 '32 of potash ,. .. 6 '09 
Insoluble siliceous matter 15 "81 
100-00 
* Containing nitrogen '33 
Equal to ammonia -40 
This specimen, it will be seen, contains 38 per cent, of phos- 
phate of lime and 6 per cent, of alkaline salts, including per 
cent, of potash, and no doubt is a useful fertiliser on account of 
the phosphates and salts of potash which it contains. On the 
other hand, it is poor in organic matter, and yields not quite 
J per cent, of ammonia on decomposition. 
In Penang Typelawer is used chiefly as a manure for sugar- 
canes. The sample analysed by me, being very poor' in am- 
monia, would not be a good manure for sugar-canes, but probably 
other samples are richer in nitrogenous constituents. 
Bats' Guano from the Bahamas. 
Most of the Bats' guano which is actually imported intc 
England as an article of commerce is derived from numerous 
caves frequented by bats on Guanahani Island (St. Salvator) 
and on other islands belonging to the group of Bahamas, and 
passes in commerce under the name of Bahama or Guanahani 
guano. 
It has a dark-brown colour, little or only a faint ammoniacal 
smell, and generally contains fragments of coral or limestone, 
