Mr Macritchie's Hygrometrkal Observations. 231 

 TabU. 



The barometer regularly fell a little after I took my observa- 

 tion at noon, until about 4 p. m., when it rose again towards and 

 after evening. The fall was generally about half a line. But 

 during the latter end of March, and the whole of April and May 

 1828, and in March and April 1829, when the barometer was 

 above 30 inches, this change was very little. 



Deeply sensible of your goodness, I remain, &c. 



George Macritchie. 



Clunie, ']th January 1833. 

 To Professor Jameson, Edinburgh. 



On an Add Liquid obtained through the Agency of Potash on 

 Alcohol ; arid on the Nature of the Lampic Acid. By Arthur 

 CoNNELL, Esq., F. R. S. E. (Communicated by the Author.) 



W HiLST the interesting properties of the various ethers have 

 made the mutual action of alcohol and the several acids an ob- 

 ject of careful study with the chemist, the relation of alcalies to 

 alcohol has been comparatively little examined. Until lately, 

 little or nothing was known on this latter subject ; but within 

 the last year or two a few facts have been ascertained, princi- 

 pally from some researches of M. Hess of St Petersburg* It 



• Billlet. des Sciences Chim. Juin, 1831. 



