329 ) 



Itv ^^■;^sllill^• willi n lilllc alkali. Aflcr di-viiiL;' oxcv calciiiiii clihifidc 

 il al oiicc (lislillcd ox er al a coiislaiil k'HiixM-aliirc ol' S5'. b'iom •);; grains 

 (tl" aiiiliiu' ^)7 üraiHs of Ixmi/.oiu» lliioi-idc^ are lliiis oUlaiiicd in a pcr- 

 locllv pure eoiidilioii, llial is lo sav 4()"/„ ol' llial i'(M|iMred l)\ llieorw 

 'ldi(> delieieiiey in llie vield is caused I»v llie Ibi'inalion ol' plicndl. 

 l*i'(»l)al»lv llds iiiav lie reduced (o a iiiininiiiin it" inslead of livdro- 

 lliioric acid a nnxliire ol' sidpliiiric acid and calcinin tlii(>ri<lc is used 

 in sncli a manner llial llie conceid ralion of llie livdi'ou'en lliioridc 

 remains altt)nl conslanl. As ihis plan inxolxcs xiiiorons sliri-inu' and 

 as onr meclianical appliances were inadcMpiale lo slir tlic rrsnilinti' 

 pasie of ,uv(>snni, n\ e liaxe nol been al)le U) praclicallv coidii-m 

 llds ol)\i()ns coiudnsion. 



In (pule an analo.u'ons marnier llic para- and ni('lanilrol)cnz.cn(' 

 llnoride inav lie prepared from llie correspond iiiü,- nilranilines and 

 llie lliree lolnene llnori<les from llie lohiidenes. Aniliranilic acid, 

 liowex'cr, onlv yielded small (pianlilies of e-finorolienzoic acid and 

 was nearly all conx'ei'led inlo salicylic acid. It was wvy inlereslinu- 

 lo nolice llial, when Irealed l»y lliis process, oiilionili'aniliiK» did nol 

 yield a trace of orllio-nilroliejizene fluoride lint only resinous masses. 

 Wai,l.\(ii has also heen unahle lo prepare this substance by iiis own 

 method as he did not succeed in purifying' llie piperididc re(piired. 

 We have made two fiiiiher attempts to prepare this subslanc(\ 

 Firstly by isolatin,i>' it from the jntralion product of ben/.ene fluoride, 

 but as this contains but little of it \\v did not succeed eilhei- l>y 

 freezin.u' or by fractional distülalion. Secondly from parafluoroiiilro- 

 benzene ; the yy-aidline fluoride obtained by its reduction yields when 

 nilraled in sulphuric acid solution 



(', U, FINH., NO., (1 :4: 2) 

 so that by eliminatin.u- the amido-^roiip, e-nilrob(Mizene fluoride must 

 be formed. Hnl only resinous masses were a,uain produced li('r(\ 



The delerminatioji of carbon, hydroucn and nitrogen in the lluoi'ine 

 (•(uniiounds could be done in the usual manner. For that of llie 

 fluorine we used a plalinum lub(^ 1)5 cm. in lenuili an<l I .S cm. in 

 dianielcr in which the substance was inlroduced niixcfj with ('aO. 

 After heatin.u- the mass contains the lliiorine as calcium lbiori<le, 

 which is then {'vm\ fr(nii the excess of lime by Irealmeiil with 

 (lilul(> acetic acid. collecle(l on a filler an<l wcMuhed. As we n(>ver 

 found lime to be perfeclly soluble in dilute acetic acid, il \\a> 

 purified by dissohinii- il in dilute acetic acid. precipilaliiiL;- with 

 ammonium carbonate and iunitinu' the carbonate so oblaiiied. 



'I'he physical conslanis of some of llie compounds prepared b\ us, 

 were accurately delermined and the follow inii' \aliies were found: 



22* 



