96 



PROCEEDINGS OP THE ACADEMY OP 



> (VIII.) 

 2.0904 grams, on ignition lost 0.2361 gram 

 Al2 03 

 BaO, SO3 

 '< CaO, CO2 



" 2MgO, PO5 

 " Fe203&Al203 



2.2904 

 .8470 



0.0248 grams. 



" 0.066 " 



" OA101 " 



" 0.0406 " 



" 0.0143 



" 0.0506 



" 1.0153 



" " 0.0926 



" " 0.0346 



" " 1.2520 



1.2142 " contained 0.0089 grams. CO2 



1.8570 



Alumina, 



Sulphuric Acid, 



Lime, 



Magnesia, 



Iron and Alumina, 



Silica, 



Lime, 



Magnesia, 



Alumina and Iron, 



Phosphoric Acid, 



Carbonic Acid, 



Oxygen ratio. 



11.29 perct. 



1.08 " 



2.67 " 



31.18 " 



1.74 " 



1.69 " 



insoluble, " Silica, 5.97 " 



" CaO, CO2 " Lime, 30.68 " 



" 2MgO,P05 " Magnesia, 1.79 « 



" FeaOs AI2O3 " Alumina and Iron, 1.86 " 



" 2MgO,P05 " Phosphoric Acid, 41.89 " 



0.73 '- 



Alumina and Iron, 1.86 per cent. Oxygen ratio, 0.86 



Sulphuric Acid, 2.67 " " " " 1.59 



Carbonic Acid, 0.73 " « " " 0.54 



Lime, 31.18 " " " " 8.86 



Magnesia, 1.74 " " " " 0.69 



Phosphoric Acid, 41.89 " " " " 23.25 



1.59 Oxygen of Sulphuric Acid require 0.53 of Oxygen of the lime ; 0.53 of 



Oxygen of the Carbonic Acid require 0.27 Oxygen of the lime, but if there is 



added to this remainder the Oxygen of the Magnesia there remains 8. 75 Oxygen of 



lime, which is to the Oxygen of Phosphoric Acid 23.25, about in the ratio of 1 : 2, 



particularly as the Oxygen of the Alumina requires Oxygen of the Phosphoric 



Acid, to form a salt with a formula most probably corresponding to that of Wa- 



vellite as before mentioned. 



Mr. Richards brought with him also a specimen of the recent alluvial guano, 

 or bird excrement, as it may be justly termed ; he obtained it from a little nook 

 in the rocks, where it was protected from the intense dry heat of the sun and from 

 the action of water. Mixed through it were several birds feathers. As may 

 readily be imagined it had some odor, though not excessively strong. 



7.4921 grams, were ignited in a platinum crucible, andgave a very strong and 

 disagreeable odor like burning hair ; it was moistened with carbonate of am- 

 monia and again gently heated, and gave a loss of 4. 0032 grams. ,=53. 83 per ct. 



2.1975 

 (( 



2.236 



4.0704 

 1.9997 



(IX.) 



grams, of the ash showed a trace of Alumina. 



«' 0-2746 grams. BaO, SO3 gave Sulphuric Acid 

 grams. 1.5150 " CaO, CO2 " Lime 



" 0.0913 " Sand " 



grams, ignited gave a loss 1.9171 gram. 

 " Ash 



1.3858 grams. CaO, CO2 gave Lime 



0.2206 

 0.2100 

 1.3178 

 0.0225 

 0.0164 



BaO, SO3 

 2MgO, POs 

 2MgO, PO5 

 Sand 

 Ag 



Shlphuric Acid 

 Magnesia 

 Phosphoric Acid 



Chlorine 



3.9652 

 .9857 

 .9794 



grams, loss by ignition 1.9282 gram. 

 " 0.6892 grams. CaO, C02 gave Lime 

 " 0.0085 '• CO2 " Carbonic Acid 



" 0.1250 " BaO, SO3 " Sulphuric Acid 



Lime 38.89 per cent. 



Phosphoric Acid, 42.21 " 

 Sulphuric Acid, 4.29 « 

 Magnesia, 3.77 «' 



Oxygen ratio. 



4.29 

 38.02 



4.83 

 47.10 



38.89 

 3.79 

 3.77 



42.21 

 3.25 

 0.26 



48.62 



39.12 

 0.86 

 4.28 



11.05 

 23.65 



2.57 



1.50 



March. 



