<J[94 O*^ tHE NATURE OF OXIMURIATIC ACID. 



kind of cirrhus cloud has prevailed, indicating a great dis- 

 turbance of the electric statfe of the atmosphere ; and the 

 bfll$, after having pulsated very irregularly for a week^ have 

 again completely stopped. Thus there seems to be a con- 

 nection between the electric etate of the air, (indicated by 

 the abovementioned circumstances) and the phenomena 

 exhibited by Mr. De Luc's column, which is a circumstance 

 to which Mr. De Luc wished to direct the attention of me- 

 teorologists, which has induced me to request the insertion 

 of these observatious in your interesting journal. 



I remain, sir, yours, &c. 

 Clapton, Hackney, THOMAS FORSTER. 



March 18, 1811. 



March 19. 

 P. S. It is remarkable, that the weather has completely 

 changed again to day : on getting up this morning, 1 ob- 

 served the cirrho-cumulus cloud through the mist which 

 covered the ground, the hygrometer indicated an increased 

 moisture of the air ; and the bells of Mr, De Lues column 

 again ring with a regular but weak pulsation. 



VIIL 



On the Nature of Oximuriatic Acid, in Reply to Mr. John 

 Davy. By J, Murray, Lecturer on Chemistry, Edin- 

 hurgh» 



To Mr. NICHOLSON. 



SIR, 



J^dinburgh, March Wth, 1811 



Theory ai.jl 



hyp )t) csi^ 

 eoniounded. 



X SHALL beg your permission to occupy a few pages of 

 your Journal with some remarks on the reply of Mr. J, 

 Davy, in your last number, to the observations which I had 

 offered on Mr.Davy's opinion of the nature of muriatic and 

 oximuriatic acids, 



T gentleman first remarks, that I hove not attended to 

 the distinction between theory and hy|>othesis, but have 

 pade promiscuous usjb of the two words, and (lave henpe 



taken 



