amples of the collection M;
     | s1, s2, s3, and s4 are P:
     | Therefore All M is P.
     |
     | Hence the first premiss amounts to saying that
     | 's1, s2, s3, and s4' is an index of M.  Hence
     | the premisses are an index of the conclusion.

DL:  There is also a passage in MS 315 (1903) that is pertinent:

     | I have already explained to you briefly what these three
     | modes of inference, Deduction, Induction, and Abduction
     | are.  I ought to say that when I described induction
 