526 
MANGANESE DEPOSITS OF INDIA: ECONOMICS. [PaBT III: 
area of the Central Provinces. In 25 analyses by Messrs. J. and H. S, 
Pattinson, cobalt is absent from 3 analyses of Kajlidongri samples, and 
from one of a sample from Maudri. It is shewn as traces only in two 
analyses of specimens from Kajlidongri. In the remaining analyses 
it is given as present, the highest amounts being 0'35°o, 0*25%, and 
0'20%. in three specimens of psilomelane from Tekrasai. and 0*20% 
in a specimen of braunite crystals from Kacharwahi. The average 
of the whole 25 is 0'090%, and of the 19 analyses in which it is 
estimated, 0-120%. Nickel oxide is returned as absent in 18 out of 
these 25 analyses, and present in the remainder. The highest amounts 
are 0'20^ij and 0" 15% in specimens of psilomelane fi'om Tekrasai. The 
average for the whole 25 analyses is 0'027% and for the 7 in which 
it is present is 0'095^,y. 
Copper is sometimes found in the Indian manganese-ores, though, 
as in the case of cobalt and nickel, alwavs in 
Copper in manganese- , . . / i 
ores. small quantities. Ihe largest amount lomid 
was in the sample of wad from Sontulai already 
mentioned, the amount being O'lT. In the samples and specimens 
analysed at the Imperial Institute, the copper was returned with the 
nickel and cobalt, for which see the preceding paragraph. In the 25 
analyses by J. and H. S. Pattinson copper was found to be 
present in every case, although in three cases, Guguldoho, Balaghat, and 
Mandri, all in the Central Provinces, the amoimt returned was only a 
trace. The highest amount of CuO is 015% found in a sample from 
KajUdongri. 0"034%isthe average amomit in the 25 analyses. It is 
.nteresting to note that a specimen of gondite from Wagora showed 
0"02% : a specimen of opalized kodurite from Kotakarra 0"02%; and 
one of opalized kodurite from Boiraiii in Ganjam. a trace of CuO. Gondite 
and kodurite are of comse the rocks from which at least a portion of the 
manganese-ores of the Central Provinces and Vizagapatam, respectively, 
have been derived. It is also of interest to notice that the analyses 
of these rocks do not show the presence of oxides of cobalt and nickel. 
Out of i samples and 21 specimens in which lead was looked for by 
J. and H. 8. Pattinson, this constituent was 
Lead in manganese-ores. . i • , i i n r t^'-i- i 
found in three samples only, all from Kajhdongri. 
The amounts were 0*01, 0"02, and 0'02%. An analysis made by James 
E. Furguson of London, of a sample taken by Mr. J. H. Goodchild to 
represent the whole of the Mandvi Bir-Junawani ore-band showed 
0*013% PbO. 
