330 PROCEEDINGS OF SECTION B. 
(4.) Light fluffy fungoid substance found in the Fairy’s Grotto, 
Wilkinson’s Cave, Left Imperial. 
Two samples of this substance were received. The first, which 
weighed 1} grammes, Guide Wyburd states, ‘““was compressed 
into a small match-box, and would fill your hat in its natural state. 
It is so light that, when you blow at it, it falls off the roof and sides 
like snow.” It is stated to only occur in one cave—that is, at the 
end of the Wilkinson Cave. 
Analysis. I, i 
Moisture and combined water ... 1:88 1:48 
Calcium carbonate (CaCO,) _... 76:03 (PASTE 
Magnesium carbonate (MgCQ,)... 6°12 5:28 
Strontium carbonate (SrCO;)_ ... trace trace. 
Alumina and ferric oxide 
(Al,O, and Fe,O;) < 1:46 1:94 
Silica (Si,0,) ... 7 ae 13°22 17:26 
Phosphoric acid (P.O;) ... ‘28 minute trace. 
Organic matter ... a on 1:32 1:14 
100°31 99-67 
The fungoid growth appears to be very rapid, for since the 
sample was received it formed in large quantities, and has the 
appearance of very fine wadding. 
(5.) White pulverulent substance found in the Left and Right 
Imperial Caves. 
Analysis. T: 1k: 
Moisture at 200° C. as ae SOT) 9:50 
Loss from 200° C. to red heat ... 18:23 18:19 
Alumina (A1,0;) Fer Lee 20°48 20°70 
Ferric oxide (Fe,O;) __... ue 18 -20 
Lime (CaO) ate ae nS trace trace 
Magnesia (MgO) a ie do do 
Potash (K,O) ... se a 8-89 9-01 
Insoluble matter (sand, &e.) ... 1:07 1:12 
Phosphoric acid (P,Q;) ... vs 40°86 40°83 
99°38 99°55 
A trace of ammonia detected. No fluorine, chlorine, or sulphur 
trioxide present. The analysis shows this deposit to be identical 
with the mineral minervite—a hydrous phosphate of alumina and 
potash, previously described by Adolphe Carnot (Jour. Chem. Soc., 
vols. lxix and Ixx, page 529). 
