COLLECTIONS IN ECONOMIC (JKOLOCJY AM) MKTA LMHcJY. 211 



(()) Massive. Norway. (»ir»l'22. ) 



(7) Massivo. Zarz.i Min... Spain ( l|-JTti), ..i tlir lollcwii,;; .oinpositioii: 



Moisture iilJl'J' (IIjO) 



Wator of coiiil. illation ( 11,0) 



riionplioric. ft«i(l*(P,(),) 



I-iiiif (CaO) 



(txidoof iron aiul alumina ((FeAl,)0,) . 

 MaKno8in,otc., not det«riuiiiuil (MjrO) 



Carlionio acid ((>■<),) 



liisulnblo matter 



n .VnalvHtH, AiiguHtiiH Voi<Icker & Soiih. 



h AnaljHt, 1). H. Oilbprt. 



* Ei|iial to trilmHio pliospliat.- „( litnf, 8.t..t.'. :iinl K:J.I)7 ji.t ct-nt. 



I'lIOSPHORITES. 



Phosphorites difter iiiiiinly from apatites in their physical condition, 

 and include tlie varieties of pIi.Ksphate olliim. whiclj are not distinctly 

 erystallizi'd or crystalline They are generally nodular and librous, but 

 are sometimes earthy. The principal deposits are in (Germany, France, 

 and Spain. A single characteristic specimen of phosphorite is shown 

 from Logrosan, Spain (44277), of the following composition: 



Moisture at 212" (H.O) '*^'^(^^°{^, 



riHiNphoric acid * (PjOr.) ;{(; j-, 



Liiiu'(CaO) ^.,■4^, 



Ahiniina, magnesia, etc., not determined ;}. r>0 



Insoluble matter jO ;{o 



lU(t. (10 



Analysts, TeMcbemacker A Smith. 



I.'OCK IMIOSI'HATES. 



These differ from tlie minenil phosphates in being impure and occur- 

 ring in relatively large masses. On this acconnt they can be mined 



<'heaper, and therefore du not i d to be sopinv and rich as the mineral 



l>hosphates. 



K'l Vl.i; IMIDSIMIA IKS. 



K'lver i>hospliales consist of n<.dules of varying si/e and shape, either 

 hvf or cenu-nted together, of a more or hss impure phosphate of lime. 

 The principal locality is in or near the rivers in thesonthern part of 



S<inth Carolina, whence the iiai iJivrr phosphates;"' iheyareal.so 



foun.l in North ran.Iina, Alabama. !'l,.,i.l,,. :,nd Kn-iand. fiance, Ilel- 



•i;.|iial to triliasio i<lio,s|>|iate of lime. ',\).:,7 p.r <•. in. 



