2 PROCEEDINGS OF THE NATIONAL MUSEUM, VOL. 62. 
tarnishes quickly. The granular structure is not as perfect and 
uniform as in the Roeburne, Australia, iron, but so closely simulates 
that which may be produced by heating an octahedral iron as to 
leave no doubt as to its origin, though whether or no the secondary 
heating was natural or artificial is uncertain. The fact that it was 
found in a plowed field some distance from the road suggests that it 
is natural and preterrestrial, and following Berwerth, I will classify 
it provisionally as a medium octahedrite with granular kamacite 
lamellae (Omk). 
A sample of the iron submitted to Doctor Whitfield yielded: 
Per cent. 
Soluble in boiling HCl (1 pt. HCl to 1 pt. H,O)............- 98. 92 
cHNGOHIBLe co rec Memes eon take net meters Seat eee 1.08 
The soluble portion yielded: 
Per cent 
Sec) eee eee Pee nt Go Ae MSE ROE ie CPAP ARENDS. 0. 015 
Ph ospharus sc. ices sre soe seed ee or eS 0. 130 
INTORGL cn ce cin ae careers cei eects ora Sie Ne Stee oa 7. 069 
Cobalt: . 2.02 Sh BURRS, Se Te Ae, od 0. 090 
Trond fyi: eh? Scents - Aes he pear A ae Tay ages dee 92. 69 
Total QY20..01.. beers. AE. Sa. Se 99. 994 
The insoluble portion yielded: 
Per cent 
PHROSPHOTUBs sv io05 keene es cates ae eee ee peels Sea ee Gere 11. 564 
Nickel and. cobalt. 2.6 32 ons soe nacccemee ne oe stone see eee 38. 89 
Tron's'.) Siege Se. Oe SE SESOTE  a 49. 00 
Carbonet aiiivs. 2290 Fe i3 92 Gees Bat. ayes eee 0. 542 
Totall.); US BAIS s, OMA. A EE SE 99.996 
Recalculated, there is obtained for total composition in mass: 
Per cent. 
D8 0) « Herege OL a CRE eRRRET | A Ae Et LTE MOUSE Cet OF, ese 91. 765 
Niekelyand ‘cobalt. cc ' onc cwn ge Ses Cewaledinnos op aera eeee 7. 445 
PROSPHONIB Sc eee ee  ee eee ee eee ee Oe Or ee 0. 252 
Carbon Or. Oo 02. IOI... 28. EA Be. See 0. 532 
Silaecon's feseyes sa: erect dovernd = letascen bee ce eee 0. 014 
Total.. sce oe — ..100. 008 
The unusual feataes of thie salable cietion is ne trance of sul- 
phur, which is an almost universal constituent of meteoric irons. 
Tests applied to other portions of the 800 gram mass in the Museum 
collections yielded like results. Chromium and copper were also 
lacking. 
The insoluble portion must be considered schreibersite, low in 
iron and phosphorus, but correspondingly high in nickel and cobalt. 
The phosphide in the Cranbourne iron, it will be recalled, gave, ac- 
cording to Flight: Phosphorus, 12.95 per cent; iron, 49.33; nickel 
and cobalt, 38.24, though the mineral was classed as rhabdite. It is 
not possible to state what portion of the carbon is free and what 
combined, but as no cohenite was recognized in the insoluble portion 
it is probably in large part free, and has been so tabulated above. 
