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MN 
aa 4 
: ‘ wo bi 
; ; ban, 8 
ORIGINAL aed fii 
"ee : 
t 
Gtiemisiede the oxides of iron. Joun B. cs a. 
Mineralogy—Methods for distinguishing natural cultivated pearls. F. 
org eae Opa aa gees. 
ar A 
PROCEBDINGS 
WASHINGTON ACADEMY OF SCIENCE... .sscecesessesiesesceeteesestenssegeeeag , 
oi 
Philosophical Soewe Gs ate oo bah Seen ae eed coals «seule pe aaa 
7 
ScrienTiFic Notes AND RUMEN NCPIANR I (08 
- 
- 
OFFICERS OF THE ACADEMY 
President: T. Wayznanp Vauauan, U. 8. Geological Survey. a ee og 
Corresponding Secretary: Francis B. SILSBEE, Bureau of Standards. 
Recnisne Secretary: Witu1aM R. Maxon, National Museum, 
Treasurer: R. L. Farts, Coast and Geodetic Survey. 
