Twelve specimens of pyridine compounds according to Sir William Ramsay. Comprising four glass vials with glass stoppers, four glass test tubes with cork stoppers, one glass test tube without a stopper, two sealed glass tubes and one broken glass vial. Variously labelled for a-dicarbopyridenate, dicarbopyridine amide, ferrocyandie of picoline, dipicoline platinochloride analyse, dipyridine and dipicoline. British, 1874-1880