I 818 -] Scientific Intelligence. I47 



the apparatus was heated by a current of hot air. Of the results 



X. M. Homer's Photometer* 

 Tvi Horn f 1 r ' of Zurich > has proposed a new instrument for 

 3 m ? nd t e »*»»* <* lightf which is very cheap and 

 Sfectot 1 H een £ Und Up ° n tria1 ' as lt is said > t0 affo ' d very 



3d S ; J' consists of a tube four inches lon s a » d 



an inch and a half in diameter, made of pasteboard, and thlre is 



s ™Z7j:T e r d by which bodies ™? be p 1 — 1 -- 



uTft and Um 5 )rm P^on. The bodies that are employed 



aLrfin" t S "* ^Vt ^ thhl Vamished P a P er > and 

 according to the number of these that it is necessary to emplov 



lis mtL^^^ the Iight that We are -ammmg^e esTS 

 XI. On Phosphate of Iron By J. Murray, Esq. 



(To the Editors of the Annals of Philosophy.) 



GENTLEMEN, . „ ,„ in 



To ' -dy, May 19, 1818. 



n reference tothe notice of « Native Prussian Blue " (blue 

 1°; S^fy P hos P hat ^ of iron), in the Annals of PhiZ 



711 "art 1'J ^™ ntl0n that durin S ^ visits to the Isle 

 ralogy y ' Paid S ° me attention t0 ^s interesting mine- 



On the farm of Ballatesin, in the parish of Ballaugh there is 

 a bed of white shell marl running N.E. by E., and I.W. by W 



SET Peal S r dlal Y vhen ^ and S ° % ht as t0 b * -p- 

 maSt' hnhnw' i° g ea / th rests i^umbent on the marl. The 



bas „ £ Zl \ f ?- Ce ' and Seems t0 form an dependent 

 A?n le , eXtent ? f f hich is not yet ascertained. * 



fossil elk ofMl n b t ]OW ? e SUrface ' various elk ho ™ (the 

 were atLh J? 2 } | haVe H en foun(L Those &st discovered 

 from tip to t fn T? e L° neS ° f the Skdl ' aud measured 11 f^t 

 Different otS'hn ?T T CG ° bserved are much fractured. 



Tl ese al lav in ! T ° f ^ Skelet ° n are * cc asionally met with, 

 the "te, io of , ? Il0nzonta P° slt ion. On minutely examining 



derable portion ofTV* ^ °/ theSe h ° rns > l found a co ™" 

 seaTch qu^ntLf nf ' Tt m ^ Uesti0n ' and on furt her 



mcumberHn e ^^S^ ^T^ ^ Caked P eat earth 

 feels meaoTPtn fh f * fhe / ecen t fracture is uniformly blue, 



mall Tumi? earthv T^' ^ "J" the fr*** U 1S found in 

 bSag connnnn nn y 'l "l" 1 P owder - The colour much ^sem- 

 dXpttoT P 6r Wue ' ° r P russian blue of an inferior 



-uJwhether (he ana!^ ^V**"*"* substance > to deter- 

 wneuier the analysis which considers it to be a compound 



* Abrid « e ' ,fron »B'bliothequeU D ivenelIe,vi. 162. 

 K 2 



