Ivi Annual Report of the Council. 



for the rapid determination of sulphur dioxide in chamber gases. 

 In 1 85 8, a description of similar apparatus was given by F. Reisch, 

 but it was more complicated and less suitable for removal from 

 place to place. Davis devised an apparatus similar to that of 

 Hart at a later date. 



Peter Hart's connection with this Societ)' began in 1862, 

 when he was elected a member. He communicated several 

 papers to the Society, the first being in 1867 " On the occurrence 

 of Sulpho-cyanates in Gas Mains," in which was pointed out the 

 great distance from the source at which this substance is 

 often found in the mains and pipes, often at the distance of a 

 mile. A year later he patented a method for recovering the 

 nitrous gases from vitriol chambers, but the invention of the 

 Glover Tower superseded his idea. 



The principle of the anemometer for strong or weak drafts, 

 described by Hart at the meeting of this Society on April 5th, 

 1870, has received recognition from Dr. Hobson, in The Chief 

 Alkali Inspector's Repot t for that year, and from other authorities, 

 although Swan in the Transactions of the Neivcastle Chemical 

 Society subsequently, in 1871, published an account of an 

 anemometer of his own construction, which involves the same 

 principle as that of Hart. 



Original papers were communicated to this Society at 

 intervals until he joined the Society of Chemical Industry, since 

 then most of his papers have been read before the latter 

 Society, which is more directly concerned with his province of 

 technology. 



In 1866, a serious accident happened at Messrs. Tennants' 

 works to Mr. Hart, senior, which resulted in his death, and the 

 management and full control of the works then devolved on his 

 son Peter. Since the death of the subject of this memoir one of 

 his sons again occupies a similar post, so that three generations 

 of the same name have now been associated with these works. 



In 1885, the situation of the Ardwick works of Messrs. 

 Tennants had, by the growth of the city, become too confined, 

 and their removal to the present site in Clayton threw upon Peter 



