BABOMETRICAL REGISTER KEPT AT ECCLE8 MANSE. 



27 



Its constituents are — 

 Silica . 

 Alnminia, 

 Lime, . 

 Magnesia, 

 Water, . 



44.300 = 2.2 Atoms. 

 40.400 = 1.7 



0.755 



0.500 

 13.500 = 1.2 



99.455 



Considering tlie lime and magnesia as accidental, tlie formula will be 



AJ^5 S^ X Ag, or bi-subsesqui silicate of alumina. 

 From the locality where the specimen analysed was procvired, the 

 mineral may be termed Tuesite. 



Barometrical Register hept at Eccles Manse during tlie years 1832-33. 

 By AxEXANDER S. Thomson ; ivith observations hy Robert D. Thom- 

 son, M.D. 



The Barometrical diurnal heights were registered at 10 A. M. regu- 

 larly. The mean altitudes for the several months of the year 1832-33 

 are collected in the following table : — 



January, 



February, 



March, 



April, . . . , 



May, 



June, 



Jnly, 



August, 



September, 



October, 



November, 



December, 



Mean, 



Corrected for Temperature, 



Mean, 



1832. 



29.509 

 .486 

 .091 

 .808 

 .829 

 .734 

 .836 

 .486 

 .848 

 .494 

 .458 

 .274 



29.571 



29.52.3 



1833. 



29.649 



28.969 



29.344 



.120 



.414 



.388 



.824 



.490 



.234 



.142 



.130 



28.960 



29.305 



29.257 



29.390 



The subjoined observations are deduced fi'om an inspection of this 

 register : — 



1. The lowest station of the mercury during 1832 was 28.6 on the 

 5th of October, to which point it fell the same day from 29 inches ; and 

 this rapid subsidence was followed by a heavy rain, which continued 

 for several days. 



