349 



Finally, he gives examples from the writings of M. Elie de Beau- 

 mont of similar anomalous superpositions in the Alps of Dauphine, 

 and in the writings of M. Hugi and M. Studer, of others in the 

 Canton of Berne, which would leave the fact in q[uestion still to be 

 accounted for, even if all geologists from the time of De Saussure 

 had been in error as to the particular constitution of the chain of 

 Mont Blanc. 



The paper was illustrated by sections showing the views of suc- 

 cessive geologists. 



The following Gentlemen were duly elected Ordinary 

 Fellows : — 



W. Mitchell Ellis, Esq. 



Dr G. J. Allman, Prof. Nat. History, Edinburgh. 



Monday, 4:th February 1856. 

 Right Rev. Bishop TERROT, V.P., in the Chair. 

 The following Communications were read : — 



1. On the Turkish Weights and Measures. By Edward 



Sang, Esq. 



In this paper a short account was given of the comparison of the 

 oka with the imperial grain weight, and of the arsheen with the 

 inch. 



The oka was stated to be 19,807 grains, so that 18 cantar of 44 

 oka each make one ton one pound. 



The length of the arsheen was determined by comparison with the 

 ebony standard of Sultan Selim. 



The extreme length, as obtained by contact, was 29-890 inches, 

 but the ends had evidently been tampered with ; on that account 

 the divisions of the rod were referred to ; these gave results varying 

 from 29-944 to 29-949, and therefore the mean, 29,946 inches, 

 may be taken as the true length of the Turkish arsheen. 



2. Observations on Polyommatus Artawerxes, the Scotch 



Argus. By Dr W. H. Lowe. 

 Polyommatus Artaxerxes, or the Scotch Argus, is an insect 

 not only of great local interest, but has attracted, and continues to 



VOL. III. 2 F 



