395 



white fragments of calcium sulphate and phosphate were visible 

 here and there throughout the mass. The material had no charac- 

 teristic odour. 



SAMPLES SENT BY SUPERINTENDENT, EXPERIMENTAL 

 PLANTATIONS, F.M.S. 



SAMPLE No. I. This was described as having been obtained 

 within three inches of the surface. The spe- 

 cimen weighed about five ounces, and con- 

 sisted of a reddish-brown earthy powder. 



SAMPLE No. 2. This was collected at a depth of six inches ; it 

 weighed about six ounces and consisted of a 

 dark brown earthy powder. 



Sample No. 3. This specimen was obtained at a depth of one 

 foot. It weighed about six ounces and was 

 composed of a light yellowish-brown moist 

 powder. 



CHEMICAL EXAMINATION. 



The four samples of bat guanos were chemically examined in the 

 Scientific and Technical Department of the Imperial Institute, ind 

 gave the following results : — 



A. 



per cent. 

 8.42 

 2.56 



i-75 



Silica Si0 2 ... 

 Alumina A 2 3 • 

 Eerric oxide Fe.,0,, 



Manganous oxide MnO .31 



Lime CaO 22.27 



Magnesia MgO ... trace 

 Cupric oxide CuO .. . .34 

 Potash K 2 ... 2.01 



Soda Na 2 ... 1.30 



Ammonia NH 3 ... .58 

 Nitric acid N s 6 ... 7-55 

 Phosphoric acid P 2 O s T7-5 2 

 Sulphuric acid SCM 16.32 

 Chlorine C ... .13 

 Combined water H.,0 4.36 



Moisture 9-59 



Organic matter ... 4-88 

 Total nitrogen ... 2.47 

 Phosphoric acid soluble 



in water 

 Phosphoric acid soluble 

 in ammonium citrate 

 solution ... 3- 2 5 



No. 1. 



No. 2. 



No. 3. 



per cent. 



per cent. 



per cent. 



. 31.62 . 



.. 1979 



.. 21.77 



. II.36 . 



.. IO.78 



.. IO.70 



II.03 • 



• 9.05 ■ 



.. 8.28 



.20 . 



.19 • 



.. .13 



I.8l . 



. 1.86 



.. 2.32 



I.03 . 



1 .04 



-- -95 



•37 •• 



•35 • 



• • -34 



1. 12 



.88 . 



.. .88 



Z 78 .. 



•75 • 



.. .79 



.12 . 



.14 • 



.12 



.81 .. 



.91 • 



.. .86 



8.60 .. 



. 10.86 



.. 14.17 



41 .. 



•53 • 



.. .50 



trace .. 



. trace 





. 2.91 . 



2.62 . 



.. 2.24 



. 21.26 . 



.. 22.92 . 



.. 26.60 



6-57 • 



17.21 



.. 9.62 



.81 . 



i-5 2 



.. .84 



.81 



7-38 



8.54 



9-75 



