r\ 



:t 



e 



^ud; 



'ntli 



e 



^: 337, 



s» and th 



•^ciiiinatL 



P4 



orh 



eated 



es. Bv 



niinut 



nial fhell hai 

 It of its 



^^ calcareous 



' sflerts from 

 contain vitri- 

 ' calcination: 



lies 



require a 

 intain an acid, 



rr calcinatioo, 

 ones may by 



■hn 



pure 



ones 



I 



*, Art. Fhof- 

 wn to conlift 

 iaht on being 

 s Minera- 



van 



1 



become 



on c 



alcareoiis 



uaint 



ed pho^P^^"^ 



s 



» 



Sect.X. 5. 5 



MANURES 



21 1 



but 



which ml,ht probably be more A^ccei^fbl a^er calcination^ And 



thirdly, with the probable ufe of fluor fp 



calcined 



flat 



e. 



As there is reafoii to 



believe, that the vegetable fyftem may 



abforb phofph 



from any of thefe mate 



w 



hich phofphoru 



„.y o4i Jlly have been of a.>l.al o-g.". - weU as th awh c 



{Is in feces and 



And laftly, the ufe of recent (hells 



bones 



„d into powder, or of bone-arhes. fpread on la„d .ay be de 



ed 



as they 



lift almoft 



ly of phofpho 



and calcareo\>s^ 



earth. 



5. In the converfion 



f fhells into limeftone there feems to h 



acid 



aed 

 and added 

 diminution of the phofphorlc acid 



been either fimply an additional quantity of carbonic 

 from the air or from water during the proceffion ot 



fo the calcareous earth, or alfo a — , , , , c a 



to tne caic . , • • j o,,|y ^ith lime has lately been found 



But an union of phofphoric acia oniy ^^ .ik,.Rnnrrnw 



tocompofe whole mountains in Spain,which.sn.entionedbyFourcroy. 

 and is now termed phofphate of lime, refembhng bone-afhes. And 

 and is now icuuc y } . r ^ c^„-,n a vellowiOi tranflucent (lone, 

 M Brumaire lately received from Spam a yeiiownn ^ 



^^^" ^ "he found to contain nearly 



qu 



^dchrvfolite by the jewellers, which 



i ti of ph Jfpbonc acid and c.ca.ous eanb a. to be ^ 



ryftallizat 



f the phofphate of lime 



And as the Umeftone 



:: B elh: tely been difc'overed to contain equal parts of n,ag. 



effa :„d li.e, we ly hope by greater -«tion to^. W a mou 

 tain of phofphate of lime in our own country. See NichoUon Jour 



nal 1798, p. 414- ,u,f the Immenfe quantities of lime 



From hence it would appear, that the immen 4 ^ ^^^ ^^^^^ ^ 



ftone in the world, which was originally formed 



f.bmarine animals, has during the long lapfe of tu.e loft -- - ^ t 



from the (hell's of 



of its original phofphoric ac.d and acqu.r^ mo. or lefs^ ^ ^^^ 



acid.. The carbon, diffolved in the atmofphere or ni 



thus flowly decompofedthe phofph<>ric -dm e el o -y o 



ithout great heat 



does in our crucibles in a (hort time 



D 



by the afiiftance of 



D 



E 



It 



