The Georgia Bauxite Deposits. — Watson. .^5 
SiOs 1 
TiOo } 8.59 percent. 
FeoOs ) 
Total 
(Ferruginous Bauxite)* 
AI0O3 52.04... .519] f Ratioof AI2O3: HoO is 
.595. ..1.00 nearly 1:3 correspondinfj to 
FesOg 12.29... .076 j | the formula AI0O3. 3 HoO. 
H2O 28 40. ..1.577 2 65 
SiOo 2.83) 
TiOo 3-^^f 6 61 percent. 
Total 100.24 
The prevailing structure of l)auxite in all known workable 
deposits is pisolitic. So far as the writer can determine sep- 
arate analyses of the matrix and concretions or pisoliths' have 
never been made. While it is generally true that the pisolitic 
structure in case of the Georgia-Alabama ore grades into a 
structureless material, the pisoliths or concretions are as a rule 
perfectlv sharp and distinct from the inclosing matrix, and the 
two mav or may not have the same chemical composition. With 
the view of possibly determining this the writer selected speci- 
mens of the ore in the field and carefully separated matrix and 
])i?oliths. and separately analyzed them in the survey laboratory 
with the results shown below. No attempt was made at sepa- 
rate analyses of isolated thin layers of the pisoliths or concre- 
tions from each other, and of the layers from the inclosed 
powder. 
PlSOLl'l'llS M.M'RIX 
Maddox Bobo Warrior Maddox Church Walters Perry 
AI2O3 52.36 57.26 52.40 64 91 46.92 63.60 48.30 
H2O (combined) 33.17 31,69 24.06 33,00 21.68 27.15 28.01 
Si02 3.74 0.99 4.21 0.62 20.46 6 43 3.17 
TiOo 9.70 7.63 8.79 1.05 9.80 1.95 9.75 
Fe203 0.76 1.89 10.44 0.28 0.28 0.28 trace 
H2Oatl00°C 0.20 0.39 0.39 0.53 0.34 56 53 
iione none none none none none none 
MsO ) 
NfioO 
KoC) '' 
Total 99.93 99.85 100.29 100.39 99.48 99.97 99.76 
;none none none none none tione none 
The above analyses suggest more uniformity in composition 
for the pisoliths than for the matrix ; but they further indicate 
•Average of 6 analyses. 
