276 PROCEEDINGS OF SECTION B. 



district. My reason for calling it Bone Ash will appear 

 presently. 



It occurs in what is known as the " Bat Cave," about 

 seven miles from Narracoorte. This care gets its name 

 from the fact rfiat a large number of bats are found in it, 

 whereas the neighbouring caves, which, like it, are of the 

 ordinary limestone formation, contain, so far as I am aware, 

 neither bats nor guano. 



The guano is found caked together, but is readily powdered 

 up in the hand to a fine brownish-white amorphous powder. 



On strongly heating it turns white, and does not char, even 

 on heating with strong sulphuric acid. 



Analysis gives Per cent. 



Moisture 17-51 



Organic matter and combined water. . . 7*01 



Organic Nitrogen O'OO 



Fe^Oo trace 



MgO 007 



CaO 36-89 



Na^O 0-27 



NHo trace 



SiOo 0-28 



CO. 2-92 



P,0, 32-69 



SO.f 3-03 



N^O, 0-50 



101-17 



Or, combining Acids with Bases, — 



Moisture 17-51 



Organic Matter 4-59 



Organic Nitrogen 0-00 



FePO. trace 



Ca3(PO,)2 29-67 



CaHPO, 36-36 



CaSO. 5-15 



CaC03 6-63 



MgHPO^ 0-21 



NaNOg 0-77 



NH^NOo trace 



SiO, ! 0-28 



'2 



101-17 



