JOpNSTI>NE-MONAZITES FROM SOME NEW LOCA+ITIES. MONAZI'I'ES PROM SOME NEW IdOCACI1'IES. HY SPUNEP J. JOIISYTOSE, ll.Sy. (LOSII.). SCIESTIFIC A?ln TECIINICAL I~EPA1lTYEST. IHPY.IlI.U~ ISSTTITUTE. Ttio niinernl inonuzito is coniIwiwi1 rnwntinlly of phonphntcx of tliu cerium nnd Inntlinnuni iwlhn. but ~I R O containn i~ivuriubly n wrtnin prolmrtion of thoriu, nncl h e ~I w forrnn the jirincipl cvinirni*rc-inl source of the thorium nitratc cniplayecl in niiiking the! iniintlrs IIHCII for incnntlewcctnt gns lighting. lonoxitc oryatulli~p, in tlic nionoL*linio ~g ~t i ~i . nncl varies it1 coloiir from p l u yellow t o dark rcdclisli Itrown or occasinnnlly black. Its s~wcitiu grnvity in i ~~i i n l l y ahout 5.8 but ncinietinien HIIIII~IWI nn. met with, ~i i u l i OX thow 11t~wriln.d later on froin Cuylon, having II slrwilio gravity of ncnrly 5.5. A Inrgu ~iropirtion of tlw inontizite 11m-0 iticl~intrinlly in obtuinecl from deimsitn in I%ruzil, wlieru the aniiuul jiroduotion of tiir~itl contninirig W, per cent. of ino1ia7itc exwetls metric Ions. The niod cxtc.rinively worked clqaNitn in I5ruzil nru tlio nuturnlly conceritnrted ~iancln on ccrtnin Iiirrts o f tliu HI!R coiwt, ontl tlic! niiinnxitc wpur. otccl lroni tliuriu, conttriiis on tho evctrugo from 5.0 t o 7.0 1n.r cont. o f tliririn. Tho ILW i n i p ~r t ~~n t tlclwiti+ i~ilnr~tl vidtl tiiontrzite e h n i n i n g froin
4.0 t i t 5.7 in-r c m t . ( i f i tioria.1 l h ~r i n ~ the pnst two yeurn an iinjwrtnnt contriltution to tho rurld'n IirocIiiction of uioiinzitc aintl Iins INWI ruatlo by the mtiw Stutu of Trnvuncore in Iticliir. 'I'hc output in 191 I nniouuted to 811 tonn vnliwtl u t f24.O.ll and in 1918 this liucl inert-nwcl to 1,135 tons viilt~cd n t โฌ4 1.1 19. In tho course of the niinernl nurwys ~cir~cl~ictctl in rewilt yenra in conneution with tliit InIp-riiil Iiiritituti? in cxlyluti, Southern Nigcrin. h'irtl~c!rri Nigvrin. n i ~d N ~I K I I . IHIIII, ninny conceiitrnten Iinve INWII ol~taitiecl which p ~o v t d to contoin rnorinxitc!. Tho occurriwcu ( i f t hiti nii~iernl I i a i l not ~truvio~wly b u n recortled froin III(HU iwiuit ries, atid Itnrticulnr~ of tliu oixiirrences will INI foirncl in tliu oflii+ial ruptrtn i t n tlicse siirvuyri wliicli nre pulilinht-d ~i~!rioclienlly in*ttio ~~i S c l ? l h I ! I J U S Suries of UiIuniiiI Itcixtrtx (Londwi : Wyniun untl Sow). Siniilar cciiiceiitrntc*a ILLIVU I I LW liewi recuivcd irt tho I t n ~~? r i n l Inrititutu from 'I'rrrvnncoru nntl frcini ~1u~trgu. A n n I ~~i ~x of nioniwitw frciiii d l thv:i-riourcc~ hnvo IXal!Ii ntnil~. Tjia mstorinls received JLL 1110 IiiiIwriuI Inat itiitc hnve L e n mostly in tlie forni of HJIII(!H alrcntly conccntrut rtl 11s 'wunliing. They contitiired iiunic~rous ~nincpls titlivr thnn inonnzitc, nrid in HUUII WIWH tlio nionnzitea wcru Hnpnrsteil froin tliit uonwiitrntcs by clrutro.~iiaqnctic~ or olmtrostntic~ inennn. In II f u y OUWH, t lict J n ~l i l l ~i ~~ exa~i~hictl uonxinteil of I~ ninglu frugnient wc4gliing syvcwil gramn. ilfelhorl IJJ corci1yai.v. '1'111) ru~ults giveti in thiri ~I L I I I ! ~ hnvct I M w i i i I t t n i n 1 ~1 1 by tho ~nuthoil outlinucl blow which Iinx luivi urranjy!tl 80 thut tliu oo~n~ilutii uiiolyrriw, with t,liu uxcupt ion of tlio iluterwini~tioti o f the phiin~iliorici wid, cnn h i p rformed, if iiocciwtrry, on OIIU ltiirtiori of thu nln.cinluri.