9 
Ordinary Meeting, October 15th, 1867. 
J. P. Joule, LL.D., F.RS., &c., Vice-President, in the 
Chair. 
Among the donations announced was a photograph of 
the memorial recently erected in the Salford Cemetery to 
the memory of the late Mr. John Parry, presented by Mr. 
Cottam. 
The thanks of the Society were voted to Mr. Cottam for 
his donation. 
“Note on the Occurrence of Sulpliocyanide of Ammo- 
nium in Gas Mains,” by Peter Hart, Esq. 
A few months ago while some gas mains in the street 
were being replaced, I was induced to examine the scale 
which forms in the interior, being under the impression that 
probably I should find sulphide of iron the result of long- 
continued action of sulphide of hydrogen on the iron. On 
placing a portion of this scale in pure hydrochloric acid I 
perceived an intense reddening, much more than would be 
accounted for by the simple solution of peroxide of iron, 
and being aware of the fact of sulphocyanogen being one of 
the products of the distillation of coal, I at once suspected 
its presence. A portion of these scales were boiled in water. 
The clear filtrate from this gave off much ammonia on the 
addition of alkali, and on the addition of a dilute solution 
of perchloride of iron it gave at once the intense coloration 
so characteristic of the sulphocyanides. The insoluble por- 
tion remaining on the filter was then boiled in dilute caustic 
Proceedings— Lit. & Phil, Society— Y ol. YII.— No. 2.— Session, 1867-8, 
