Vol.40. Philosophical Magazine. July 1811 



Contents of Number 171. 



Page. 



L Experiments whi^h prove Platina, when combined with 

 Gold and Silver, to be soiuble in Nitric Acid. By Mr. 

 Pkscival Johnson .... 



:<S\ li. An Acrount of some Expjrimentson the Combinations 

 v^of different Metab and Ctilorine, &c. By John Davy, 

 «'if Esq. Communicat'.d by Sir Humi'huy Davy, Knt. LL.D. 

 .^m Sec. R.S. .... 4 



ijJ IjiS lir. On the Structure of the Earth. By a Correspon- 



^5« DENT - ... . . ij 



Ji^a IV. New Method of malting Bricks, so as to form cheaper 

 ;|l!itij|and fiimer Buildings, and useful underground Drains. By 

 i^W John Stethevs, Esq. of Reading - - 14 ' 



J V. On the Derivation of the Scale, &c. - - 17 



i VI. Description of a tetiiporary Rick to secure Corn in 

 Sheaves in the Fields till quite dryj also Clover, Pens, and 

 1 Beans, By Willjam Jones, Esq. of Foxdown-Hill, near 

 ' V/ellingt(in, Somcrsetshiie - - - 18 



VI r. On the Combinations of Sulphur and Phosphorus 

 .^^; with Platina. By EcMUNn Davy, Esq. Chemical Operator 

 ^n"'J?\ and Supcrintendant of the Mineralogical Collection in the 

 '^~^>,M>y Royal Institution. Commur.icdted by the Author 



VIII. Description of an Arorn Dibble, invented by Mr. 

 Cjiarlks Waisieu,, of High Holborn - "39 



(1>|J^ IX. Ex^mi;lation of a Species of Plumbago from Africa. 

 \\^il?% "R,, iR"dm-jkd D.\Vy, Efo. Chemical Operator and Superin- 

 ir of the Mincra'cgical Collection in the Royal Institu- 

 'tion. Communicated by the Author - - 41 



X. Mr. Bakiwkll in Reply to Mr, pAacY's Geological 

 U?«* Observations - - - - - 45 



'^.^x'^ XL Dr. Lambe on Arsenic - - - 48 



f^>^ Xn. On certain Points connected with the Super-position 

 W of the Stra-a of England. By David MusHET,*Esq. 

 !py XIII. v"^.! the Elements for r;;iUicing the Polar Distances of 

 iS i% the princip J Mixed Stars which pass n„ar the Zenith of the 

 "^"vk^ Royal Cbferviitory at Greenwich. Taken from Dr. Br ad- 

 i^^ tET't Catslcgue, by Mr. I'li'MiNG'-R - - 55*1^' 



™i1j~>j XiV, Ptoci-edjngd of Learned Societies - - 59 



* ' XV, Intelligence and Miscellaneous Articles, — Meteoro- 



logical Table, &;c. 



66—80 &k 



Wh x-^t* Comnmntc»llons for this Work, addressed to the Editor, ^^ 

 iiiy Pickett- Place, Temple Bar, will meet with every attention 



"«i iiii: 



'Sn CO, PRINTERS; SHOE LANE, FLF.£T STREET, lOMOCM. 



