K T. Allen — Native Iron in Missouri. 103 



a little higher, probably on this account. The specific gravity 

 of the larger piece was .7*58. Of two small fragments of the 

 other, weighing about half a gram each, we found the specific 

 gravities 7*83 and 7*88. 



Analysis. 

 Ikon — 



1. Metal taken = -3919 gr. 59-57 cc KMn0 4 required. l cc = 



•006530 gr. Fe. Fe = 99'27 per cent. 



2. Metal taken = '3830 gr. 58*37 cc KMn0 4 required. Fe= 99-52 



per cent. 



3. Metal taken = -1596 gr. Dissolved in hydrochloric acid, pre- 



cip. by NH 4 OH and determined as Fe 2 3 . 



Fe 2 3 + FeP0 4 -22697 gr. 



Cal. for FeP0 4 -00047 



Fe 2 3 -22650 Fe = 99-34 per cent 



Silica — 

 Metal taken = 3-2052 gr. Si0 2 == -0100 gr. Si0 2 = -31 per cent. 



Phosphokus — 

 Metal taken =3-2052 gr. Mg 2 P 2 7 = -0148 gr. P =-128 per cent. 



Analysis. 



Fe 99-39 



!Si0 2 -31 



P -13 



C undetermined. 



III. Natural Iron from Holden, Johnson Co., Mo. 



This iron was discovered by Mr. Gr. W. Hills of Holden 

 while drilling a well. The upper strata passed through con- 

 sisted chiefly of fire-clay. At a depth of 21 ft. coal was struck. 

 This continued for 18 in., and then followed fire-clay again 

 until at a depth, of 37 ft. the drill struck something hard which 

 caused it to rebound. After some time, no headway being 

 made, the drillings were examined. A few small pieces of 

 metal about the size of lima beans were drawn up with the 

 clay. The discoverer informed us that he drilled out alto- 

 gether about as much of the substance as one could hold in the 

 hand. As he was disappointed in his original object the well 

 was eventually filled up. 



We received specimens of the drillings and one piece of the 

 metal which weighed about 3 grms. The clay in which the 

 iron occurred was compact and gray in color. It contained 

 65*25 per cent of silica and 3'63 per cent of iron. When first 

 brought to the surface, the iron resembled tarnished silver, but 

 showed no signs of rust. Its hardness was about the same as 

 that of the two specimens previously described, sp. gr.= 749. 



