A System of Logic: Ratiocinative and Inductive, 7th Edition, Vol. I
CHAPTER VIII. _Of the Four Methods of Experimental
Inquiry._
§ 1. Method of Agreement 425
2. Method of Difference 428
3. Mutual relation of these two methods 429
4. Joint Method of Agreement and Difference 433
5. Method of Residues 436
6. Method of Concomitant Variations 437
7. Limitations of this last method 443