3^4 Mlntralogf. 



The air of Paris, collected on the following midnight^ 

 and analyfed by means of the nitrous gas and fulfate of iron, 

 was found to contain 0,276 of oxygen gas. The air col-» 

 Iected by Cit. Garnerirt contain d only 0,259 of oxygen. 

 The firP; was at 103 degree?, the fecond at so8 of the eu- 

 diometer. The air of the high regions was confequently 

 5 degrees, or 0,017 (almoft equal to 0,02) more impure than 

 the air at the earth's furface * '. 1 his difference is very 

 confiderable, when we reflect, that the greateft or leait purity 

 of the atmofphere does not differ near the earth's furface 

 but 0,03 of o.ygen, 



MINERALOGY. 



Mr. Donald Stewart, who has been employed for fe- 

 Veral years pait as travelling nnnevaiogift to the Dublin So- 

 ciety, has lately arrived at Belfait, after having paffed over,x 

 in his lafl j urney, the counties of Meath, Cavan, Ferma- 

 nagh, Donegal!, Derry, and Antrim. He had before ex- 

 plored the greateft part of the South and Weft of Ireland. 

 He has made many new and curious obfervations, and col- 

 lected numerous fpecimcns, illuftrating the natural hiftory, 

 and affording materials for the arts, manufactures, and agri- 

 culture of that kingdom. 



Though not educated to thofe purfuits, he has been inde- 

 fatigable in his refearches, and fuccefsful in his difcoveries ; 

 and indeed he appears to be the firft perfon who ever at- 

 tempted making any general furvey of that ifland with a 

 view to its mineralogy. 



Some imperfect accounts of the native plants of Ireland 

 have been publifhed by Rutty, Wade, and fome other gen- 

 tlemen, who, during the refidence of Lord Chefterfield as 



* It is eafy to account for the atmofphere containing more oxygen near 

 the earth than in the higher regions ; the vegetables which grow on its 

 furface being the principal agents employed by nature to reftore the purity 

 of the atmofph-re : but it is aot fo eafy to account for the prefence of 

 carbonic acid gas at lb great a height. Elut. 



viceroy, 



