ijrti? .agfini x^ecifie gravity ;. ill utri al 2;R83n089b Tjlauoivoiq lannt-m 

 io olB-Sdie. iu^arbonate of linaerj'.-4v/ 49*150(^1 oJ baifxiorf nood ^nivijil 

 i& 9iii^ ajJii^SftrbonatejOf magnesia 44'00Qi9l gniad airiJil arij ,fiboK 



Silica 4-000 — ; awollol 



Phosphate of iron ... . 0*74 0*727 



u., r_ - Peroxide of iron . 1*200 , . moa anojIqaoiW 



80-5i; Alumina 1 *GOO.t; fiiiimx/1/v 



tS'We found it to contain a decided amount of phosphof?6'tlG4d, as 

 Exhibited in two trials made by Mr. J. C. Stevenson. ' ' ^' 



A similar limestone exists in Stirlingshire, at Boquhan, and is be- 

 lieved to extend to the south-west, although I have not had an op- 

 portunity of tracing it. For the opportunity of examining this lime- 

 stone, I am indebted to the attention of William Murray, Esq. of 

 Polmaise. The specific gravity of this limestone varied from 2*753 

 - tO'2*830 and 2-833. i l!!.i <•- 



owi The following are analyses of four different specimens^iitH yiii 

 -ioa-i -• • ]_ 2. ' 3_ uiui-jiui^^ 



jbiiCarbonate of lime ..o..i,^..;k^..^^'JS3*69 56*07 53*06 ''fiiVoO 



,1* bCarbonate of magnesid'':... Q.. /,{.'■ 43*49 39*34 43-11 ^!' 



bioB Phosphate and peroxide of iron.,. 0*96 0-74 2*34 



_^j Silica and alumina 2-46 3-85 , l,-49 



ynji The first analysis was made by myself j Nfe. 2,*tiy Mr'; ArcMbald 

 ? Sinclair, Hillhead, Stirling; No. 3, by'M^i J(Kn Th6'A^tfti,''ph. ; 



and No. 4 by one of my assistants. ' Fr)H(K((f'oo'>fi ton ^i juiifn.i!,-: 

 f.<yjBy three analyses the composition of ttiJS' liittiftiMJOnfe •\Vay'iiStefe^- 

 ;ii^1kined to be, stating it in another form, ' ^- ''/-!':■ 



-iKO -^filfal^; nq "io 9ii/;}xiffl js dJiw ^ggo^i o1 ^'jgg^g"-^'^ V/^ ^' 



oxii r. Magnesia' ' :'5«'V?i?iSC^^*'S24^^'-^"'^ -^""'^^ ' ^0*465 



o^^i Phosphate of^ffbff«r'.«^^9^^^'^^'i&-§e^'^' '^"^'#4^^,. ; 0-279 



-^■JI Silica and alumina ..">^.'-:H '' ^6^'^ n'^-flHim'^'' ' 2*958 



j;iaua-Carbome acid and \^k«e!i^A"' %'S^^'"I''4t-9§r'"' ':46^00 . 

 ^d baioo'iia ^iyl-Jlq^o'-^ ^'fora r-s aiii'l .D-ijoaj-n <(linaao od Jonii£o<ri 



Odi M<'' <:rfr, ..i-ir-r;. '] '. , MTnirc ' •ii', -^' Mi ; V }f i '(Fli'^ri '^i i rfiif1if[ii- i; -'.;ii;>ll 



fiJXAM I NATION OF SOME NATIVE AND ARTIFICIAL COMPOUNDS 



-fiu-5 mU ^F'J'HOSPHORIC acid. by C. RAMMELSBERCh. 



-oiq modtrA xloiii." oi [Continued from p. 237.]' ' '"''"^^''^ '^ "' ^^^^^^' 

 ■xIT \3x:'Hf 7(f ^.^Phosphate of Alumina and Litha. .^-^^^^^^ ^^^j^,^,, 

 ^;;)j.i If ,• after washing the phosphate of alumina obtained frdm a sdlution 

 ,\s4'- alum by precipitation with j)hosphate of soda, we dissolve it in 

 solution of potash until it is saturated, and then add a solution of 

 chloride of lithium, a voluminous precipitate is formed, which, ac- 

 cording to Berzelius, contains phosphoric acid, alumina and lithia. 

 When washed with cold water and dried, it forms a white, very loose 

 powder, which is readily soluble in acids, and on being heated parts 

 with a large quantity of water. For analysis it was heated to red- 

 ness, the residue dissolved in muriatic acid, and the alumina as well 

 as the greater part of the phosphoric acid precipitated by ammonia. 



