[ 9° ] 



These experiments were begun on the 26th of September 



1788. 



The following mixtures were then made : 



N". I, 100 grains of lead filings with the fame quantity of lime 

 and three ounces of diftilled water. — Thefe were put into a 

 phial which was carefully corked, fo as to exclude the air. 



N". 2. — The fame quantities of lime, lead and water, in a 

 bottle, which was left uncorked. A piece of lead wire, one- 

 twelfth of an inch diameter, which weighed 30 grains, was 

 put inl:o each of thofe bottles. 



N". 3. — ^A fimilar piece of lead wire, with about two ounces 

 of lime water, was put into a phial, which was corked. The 

 phial contained fome air. 



August 24th, 1790. The contents of thefe phials were 



examined. The furface of the wire in N"^. i. appeared bright 



and metallic ; its weight was thirty grains exadtly : Hepatic 



air, paffed through the liquor, fcarcely produced any tinge. 



The piece of wire in N°. 2. weighed twenty-eight grains ; 



this was covered with a whitilh grey fcale, which was fcraped 



off before the lead was weighed; the water of the mixture 



had been, at fome time which I could not afcertain, fpilled 



by the fall of the phial ; the lime at the bottom of the phial 



appeared flightly cauftic. The wire in N**. 3. was covered with 



a cruft like that in N°. 2 ; this cruft being feparated, though 



not completely, by bending the wire backwards and forwards, 



the wire weighed twenty-nine grains. 



August 



