Intelligence and Miscellaneous Articles. 537 



upwards of twelve months before, and had been confided to him for 

 pubhcation more than six months previously, particularly when, on 

 hearing that he was going to lecture, I reminded him of the position 

 in which he had placed me, and requested that he would do me the 

 justice to allude to my improvements at the same time. Why this 

 request was denied to one to whom Dr. Noad had professed so much 

 friendship, I cannot understand. 



With regard to our respective claims to priority, I can only say 

 that my machine was finished six months before the time when Mr 

 Bentley states that he commenced his ; and I had also worked out 

 most of the results contained in my communications to the Philo- 

 sophical Magazine long before that period. It is a remarkable cir- 

 cumstance that there is no part in Mr. Bentley's arrangement which 

 did not previously exist in mine. 



I have the honour to remain. Gentlemen. 

 Your obedient Servant, 



oa-a ^ 11 c. . t., . Jonathan N. Hearder. 



28 Buekwell Street, Plymouth, 

 June 13, 1857. 



ACTION OF NITRIC ACID UPON GLYCERINE. 



Dr Debus has succeeded in obtaining from glycerine and nitric 

 acid, besides two or three other compounds, an acid belonging to 

 the propyle series, and homologous to glyoxylic acid. The detail of 

 this investigation will be published in a future Number of this 

 Journal. 



ANALYSES OF THE SULPHATO-CARBONATE OF BARYTES OF 

 THOMSON. BY DR. HEDDLE. 



I believe it to be pretty generally understood among mineralogists, 

 that the sulphato-carbonate of barytes of Thomson is merely the 

 carbonate encrusted more or less with minute crystals of the sul- 

 phate : two analyses which I have lately made confirm this view 



a From Dufton ; b. from Hexham (portions of crystals upwards 

 or 4 inches in diameter). 



«• b. 



Carbonate of barytes... 99-24 98*96 



Sulphate of barytes ... 54 (minute crystals) 

 Carbonate of lime -22 



•94 

 trace 



10000 99.90 



Phil. May. S. 4. No. 89. Supjd. Vol. 18. 2 



