6Purification of Oxalic Acid.
18Method of Analysis.
7Preparation of Cadmium Oxalate.
19Discussion of the Results.
8Procedure
20Discussion of the Results.
9Preparation of Hydrogen Sulphide
21Discussion of the Oxalate Method.
10Preparation of Nitrogen.
22Other Methods
11Mode of Procedure.
23Conclusion.
12Discussion of the Method.
24Biographical Sketch.