BAT (UAXO IX KHODKSIA. 



i(i;^ 



liill. Tlie caye, wliicli is situated about 80 yaids from the 

 eiitiaiice, consists of one laig'e cliamber, 85 feet wide by 

 70 to 80 feet long-, Avitli side chaiubers that have not been 

 prospected np to the ])resent. Prior to my visit the upper 

 layers of the g-naiio in this cave had been removed. A'1)rownish 

 g-uano, represented by Lab. Xo. 123 (x, was selected from 

 various places in the remaining' deposit to a deptli of 15 inches. 



The folloAviiig- are the results of analysis on the air-dried 

 inaterial after being- sifted througli a one-millimetre sieve: — 



This sample shoidd ])e classified as an inferior ])hosphatic 

 guano, and the lemarks made in reference to sami)]e Xo. V22 (j 

 ajjply thereto. 



Ji. — N," (a).\JJ():MA CAVK. 



This cave is situated in a hill about 37 miles east of the 

 Umniati caves, and about 43 miles' west of (jratooma, its 

 name being derived from the N'g'ondoma River, which Hoay.s 

 on the east side of the hill. The cave, so far as at present 

 known, consists of a series of chambers, the larg-est of Avhicli 

 is oval in shape and has an average dimension of 300 by 

 00 feet. The chamber is surmounted by a dome, which at 

 its highest point is about 40 feet above the surface of the 

 dei)osit. Through the ovcrliead rock, which is al)out 40 feet 

 in thickness, a natural shaft leading into the main chamber 

 is provided. The vertical distance from the mouth of the shaft 

 to the surface of the deposit is thus about 80 feet. Another 

 entrance to the main cliamber of the cave is provided from 

 the side, but, owing to its irregular nature, it cannot be used 

 in its present state for the removal of the deposit, consequently 

 the guano is now being hoisted by means of a windlass 

 throug'h the natural vertical shaft referred to above. The 

 extent of the X'gondonm deposit must be very considerable, 

 as it has been proved in some places to be over 20 feet in 

 thickness. 



PiutiruJavs of Samples.- — From the main cliambci' of tliis 

 cave the following samples Avere taken for analysis : — 



liab. Xo. 124 G. — Average sample of the surface layer 

 to a depth of 4 feet, about 80 feet from centre of 

 cave. 



