^•>''">- J(>iirn;>I o[' Applied Micrt^scopy 



j;c'hlrnit«> .uul .\kiM in.initr. Author's invostii;;i(ic)ns on artilioially prcpaird 

 nu>lilitos i\o not piovo the oxistomo of this sorios. DilToroiU arlilicial inclilitos 

 air descMibi'il. all havinj; in>sitivo optical ohatartor. a>ul some sho\vii\g spherolitic 

 iorms ami 70u,\\ stiuotm(\ Thev aic also ('haiacteii/<>(l hy stioni; [(ov melilit(') 

 ilonMt> letiaetiou (^.00^) .t>0(iV , m, | | 



Rojicra, A. F. Sphaloiitc nysi.ils ol .» pc* >ili;ii Tlu' iiystalsaie i tiUlish-hrown in voloi , 

 lK»l>i( aiul willi owe lu'w toin\, \\om (Jalcn.i, , " i ■ i i- 



K.>ns.«s. Am. loui. S.i. iv.Q: i?.), i.)oo, ami sijoitoned in the direction ot one 



of the luMahedial inteiaxes. They 



ha\(> a hemimoiphic aspect dm> to the pn'si-iue ol thi' laces ol the new ioiin, a 



positive hemi tetiai;onal ti isoctalu^lion o (^S;>.'!V ti umatiiij; hall ol tlu- dodeca 



hiulial Climbs, tlu> doilccaliedion ,;' ^1 It*"! luMiii; the chiet loim. Twins aii' nu>n> 



ciMUiUvHi than sunple vivstals. MiMsuienuMits ueie made only with t'ontait 



jjoniomi'tii. i m. i i 



I'roslon. H. L lllmoislJuloh M.-u>ou.<-, A,u. ,-,,,iii(,> niesent in very small quantity. 



lion shows iu> etihiui; lii;ures. Rhah- 

 dite crystals probably present. \\ cMj;hl '.2.115;') grains. (\ 7.7. .Analysis^ivcn. 



1.. Mil. 1., 



Suh«i.l(c. .. now minoval. i;. A. ^\.^^c^ ,\ copper - sulpho-yanadile,'" :U\i..S . 

 }o\\\. I \\('\\\. .^oo., 77: ie>).). looo. ' ' ' ■ 



\ ,jS , from "near the buna, in St)u(h 



.Australia." associated with mal.ichiti\ .i/nrite. ijuart/, yanadium ochre, gypsum, 



and calcile. I'iist reciMded inst.iuie ol a sulphide mineral cont.iinin<; yanadium 



as one ot its piiucip.d constituents. Two .in.il\s(-s i;.i\e tlu> loUowini; ; 



C\i \. S. 



.\. ..... 51.57 i:?.b> :m.5^7 



iv .... xl.\)(\ i;{.7o :u.0'2 



riu-oiciual tor :u'u„s • \".,s ,. - 51.50 i;>.ss :?4.(>'2 



Some ot the physic. d pioperties .ire : massive, luster metallic to sub-metallic, 

 lolor bion/e yellow, streak nearly black. H .'5.5 (> ■{. No crxstalline form 

 vK'tecled. .\. I", u. 



Rlchnnls. Joseph \V., and I'owcll. N«rm«n S. p,,^, experiments were undertaken to 

 r.iihi>ii.»u\s. Knii. AiuriuMu. .^vv. 22: 1 1 ;, lind a satisfactory substitute for hydro- 

 Nt.iuli, looo. ehloric acid for testing carbonates in 



the tield. The action of -0 per cent, solutions oi potassium acid sulphate, citric 

 acid, tartaric acid, and U> per cent, solution of oxalic acid, on sixteen of the 

 nuire common c.vrbonate minerals, in lump aiul powder, are recorded in tabular 

 form. Tartaric acid is regarded as the best reagent, with citric acid as a close 

 second. Some sulphides give olT hydrogen sulphide with the reagents. The 

 authors seem \o have been utterly unaware o\ Holton's previous work along this 

 line. .Annals N. \. .\cad. Sci.. I: I. l>7i>; rhemical News, .?0: •J45» ; 37: 11, 

 *J», t>5, S(), «)S ; 4.1: :51. ;5'.>. A. K. K. 



Nichols, Henry W. A Now 'l'<-si loi (."hloiiuo 'Potest a substance for chlorine it is 

 toi I'so with tlio lUowpipo. .\nuM. C'lioiu. , i ■ i • • ^ ^ \ . 



1o«i. 2.S: ;,i s. Apiil. ukm. powdered with potassium acid sulphate 



and placed in a closed tube. .\ frag 

 n\ent ol tiltei papei, moistened with cobalt nitrate solution, is put into the mouth 

 of the tube, and the mixture fused. If chlorides are present the paper will turn 

 a bright blue, and if bromides or iodides are present the color will be green. In 

 the case of minute quantities it mav be necessary to dry the paper before the 

 color appears. V^ther details of manipulation are given. Specimens of sodalite 

 (CI. 7.1> per cent.), /unyite (^Cl. -.5> per cent.\ and apatite gave good reactions. 



A. K. R. 



