Cii.\p. XXIV.] 
ANALYSES. 
515 
Analyses of cargoes 
of Indian and foreign 
ores landed at Mid- 
dlesborough. 
Analyses of the Manganese-ores of the World. 
Ill tables 72 and 73 I give the limits and averages, respectively, of 
figures of analysis of cargoes of manganese -ores 
and manganiferous iron-ores landed during the 
years 18^)7—1906 at Middlesborough. The 
figures were obtained by Dr. T, H. Holland in 
1906 and represent not only Indian manganese-ore, but also the man- 
ganese-ores of the Caucasus, Brazil, and Chile, and the manganiferous 
iron-ores of Greece and Spain (via Carthagena). From these figures it 
vfill be seen that the Indian ores contain less moisture than those of the 
other coimtries. Some of the latter contain such large quantities of 
moisture— Caucasus, 8-67% ; Brazil, II '35% ; and Spain, 8*44% — that it 
is necessary to reduce the analyses to their condition when dried at 100°C. 
before any fair comparison can be made. This has been done by assuming 
that the constituents of the ores not given in the ' as received ' columns 
would if determined make the analyses add up exactly to 100. From the 
figures representing the dried ores it will be seen that the Indian ores 
stand first as regards manganese contents, with Brazil a close second : as 
regards silica, Brazil stands first, with India second : as regards phos- 
phorus, however, India stands last but one, the only ores containing more 
phosphorus being those of Russia : the Indian ores contain much less iron 
than the manganiferous iron-ores of other countries ; but of the true 
manganese-ores they contain the highest amounts of iron, in spite of 
the fact that they also contain the highest amounts of manganese. 
This feature of the Indian ores as regards iron contents may be regarded 
as a point in their favour, or otherwise, according to the use to which 
the ores are to be applied It is true that the high iron contents makes 
it more difficult to manufacture the very highest grades of ferro- 
manganese from the Indian ores ; but on the other hand if the very 
highest grades are not required then the iron is of considerable value. 
Both manganese and iron are of use in this case, and the buyer obtains 
the following totals of Mn -j- Fe when he buys the ores of the difierent 
countries : — 
Mn -I- Fe % 
India 57*17 
Brazil 
Russia 
Chile 
Greece 
Spain 
5409 
50-41 
48-40 
47-99 
44-27 
