Bmjal Soc'iehj rj Eclinlurgli. 71 



miiratuij; process of Guxton Morvc^u he found the most conve- 

 nient, l^iit in ca.es of letters cominc: from parts where the 

 pkijrue actually exists, he considers it proper either to make cv.ls 

 or punctures in the letters. , 



T.VO matherr.atieal papers, of a nature not f^t for p;ene 

 reading, were laid hefore the Society, «hich then adjourned iul 

 Thursday, Nov. 7- 



RDVAi. socrv.TY OF ErrNKr-RGiT. 



Papers on the following subjects have been read since our U^t 



'""on ihe Analysis of Sea Water ; by Dr. Murray. In this paper 

 the result is piVen of an analysis of a salt formed ni the large 

 wr,v from the I,rine of sea water, and which seems hitherto to have 

 escaped o'oservation. It is a sulphate of magnesia and scda,^^,- 

 stallized in verv regular rhombs, hut sometimes w,th VinneaJY 

 rd-es and angles. It contaiir. considerably less water ot ery-r.a- 

 lization thanVither sulphate of soda or sulphate o. magnesia, r. 

 less nauseous, and differs in other properties. It has not been ap- 

 plied to use, hut mav perhaps be employed as a purgalive. Ur 

 Murray has also furnished a paper eontaining a genera! formula 

 for the analysis of mineral waters, the object o, wluchis to gr.e 

 nne method applicable to the analysis of all waters, nistead ci 

 tlie various methods before employea. 



On the Ancient Geography of Central and Eastern Asia, ^^..^ 

 illustrations derived from recent discoveries in South India ; by 

 Mr Hufrli Murrav. The autlior conceives tlKit the ancients kne^v 

 n.ore rcsnectinj tliis quarter of the world than is generally sup- 

 nosed. The modern discovcrv respecting the course of the nvers 

 of the Punirb, and their mnction before falling into the Indi", 

 oMlv restores Ptolnmv's map of these rivers. He emiea-.'cjurs, a:r.l 

 with an appearance'of some success, to snow that Pto omy s 

 statements, carefullv analysed, give a pretty correct outline ot 

 central and eastern Asia: and that the prevailing systems ot 

 d'Auville, Go^selin. &c. are fnun.led on an undue contempt o. 

 ,„ciont amhorities: and some delusive resemblances otna.ne, 



Dr Brewster ha- f-.irnished papers— on a new opticnl aiiO mi- 

 „nra!ogicd propert^ of Calcareous Spar ; and on t >e commun> 

 cation of double liefracti.ni to Glass and other substances tl .-.. 

 refract singly, l>v mechanical compression and dilatation; and a 

 "oUc^ respecting some n-w disccwevies on Light. In the not.c^ 

 alluded to. he mentions thrrt he has found that water exists in ni- 

 trate of potash in the state of ice. . 



Dr. (iordon communicated observations to prove that the ap- 

 ,,raran<e calle.l the InffiJ coat or wjlamrnatory crust is occa- 

 Lona!ly.ecuon arterial as well as o:mc.k us blood j ^1.0 cbser- 



E4 



