ii is to r r of the $ o a str. 19 



1791. 



Phyf. CI. The fequel of Dr Blair's paper was read, viz. April 4. 



Experiments and Obfervations on the Unequal Refrangibility of aneafuSrefra? 



Light. The paper is publifhed in this volume. [No. I. Phyf, ' gibm - y f light 

 67.] 



Lit. CI. The remainder of Dr Doig's DifTertation on the A P ril l8 - 



DrV, 



aneier 

 lenes. 



Dr Doig on the 



ancient Hellenes was read. ancient Hei. 



A general Meeting of the Royal Society was held for the June 2;. 

 action 1 

 Society.] 



election of Members. [See Appendix to the Hiflory of the in g ? eia 



Phyf. CI. There was read an Analyfis of the Waters of the July 4. 



Hot Springs of Geyzer and Rykum in Iceland, by Dr Black, ? y r*«tilZ 



Profeflbr of Chemiftry in the Univerfity of Edinburgh. The Sk^T* 

 paper is publifhed in this volume. [No. IV. Phyf. C/.] 



Mr Lumifden's 

 journey to Ti- 

 voli. 



Lit. CI. Mr Dalzel read an Account of a Journey made July 18 

 from Rome to Tivoli, by Andrew Lumisden, Efq; with a De- 

 fcription of a Marriage-ceremony, taken from a bas-relief on 

 a farcophagus at Tivoli, being a letter from the Author, addrefTed 

 to John Macgowan, Efq; Edinburgh. This paper, as being 

 intended by Mr Lumisden for a part of a larger work, was not 

 put into the hands of the Committee for publication. 



Phyf. CI. Dr Hutton communicated fome additional Ob- Aug. 1. 

 fervations on Granite. Thefe make part of the paper referred 

 to above. [No. II. of this volume, Phyf. CI.] 



Dr Hutton on 

 granite. 



Phyf. CI. A Letter was read from John Thomas Stan- Nov. 7. 

 ley, Efq; M. P. to Dr Black, giving an Account of the Hot aSount n f y tL 

 Springs of Rykum in Iceland. This letter is publifhed in this r^T ° f 

 volume. [No. V. Phyf CI.] 



(G 2) Some 



