172 GEOLOGICAL RECONNOISSANCE 
brown and blackish-brown color, with occasional yellow spots; fracture 
dull, dark reddish-brown; emits argillaceous odor when breathed upon; 
adheres slightly to the tongue. 
Composition of air-dried ore: 
Silica and clay ose say aed arate eh sey WIPRO COs fo: te ess rah Wala he de te «ee 8.090 
Sesquioxide of irons ++ ++ essere eee er teeter ees 83.920 
Sesquioxide of manganese-++++ sree ee eeerereeeees trace 
ALUMINA + te ce cece ee ee ee ee eee wee ener rere re ene 1.710 
Tetris 8 iarevecBo wl sie aera eh eo ee Re EW are ay wwe Gre trace 
IW AtER 64 es 68 Mesias ew ee We eee ees $e Kew HS BH 11.580 
100.300 
88.920 parts of sesquioxide of iron contain 59.74 parts of metallic iron. 
No. 30. Limonite, four miles south-west of Imboden’s ferry, Randolph 
county. 
Exterior crust dirty reddish-yellow, earthy; in the interior dark bluish- 
brown, consisting of indistinctly concentric, contorted layers; loosely 
aggregated; rather soft; evolves strong argillaceous color when breathed 
upon; strongly adhering to the tongue; powder of a dirty brownish olive- 
green color, becoming dark reddish-brown on ignition. 
Composition of air-dried ore: 
Insoluble silicates: +1 sss eee ee cece renee eee eens 7.740 
Sesquioxide of iron s+ sees cere eee ee cree een ees 66.808 
Sesquioxide of manganese +++ ++ esses cere eneees 11.472 
AT GMINA 8 Hie wos eee eS le Spe a oe ON ae eas 1.295 
TATE aio Sf ere eae ei ee Sree See ee Wee He iS aap wr eae trace 
Phosphoric Bets see neve tens setaws week eaxaews trace 
WATER sa ee 6ilee Sars Ca ARE ES Ge ea Sa ee ain Wale 13.337 
100.652 
66.808 parts of sesquioxide of iron contain 46.76 parts of metallic iron. 
No. 31. Limonite, four miles west of Salem, Fulton county. 
Massive; very compact; on surface brownish-yellow; on fracture 
brownish-red, with steel-gray spots and stripes; fracture subconchoidal; 
evolves argillaceous odor when breathed upon; adheres to the tongue. 
Composition of air-dried ore: 
Insoluble silicates and sand:...-- See ee eens 20.722 
Sesquioxide of iron++++seeeeeeevees Peete eee ene 68.543 
Sesquioxide of manganese ----- Cone ee eee ees 1.221 
