Add punctuation: We may have succeeded at the price of too much eccentricity or we may have failed but we can hardly have failed completely the subjectmatter being so attractive that only extravagant incompetence could make it dull
A: We may have succeeded at the price of too much eccentricity, or we may have failed; but we can hardly have failed completely, the subject-matter being so attractive that only extravagant incompetence could make it dull.

Add punctuation: bracelet brought together 13 Rosewood 18mm diameter with a Tibetan
A: bracelet brought together 13 Rosewood 18mm diameter, with a Tibetan

Add punctuation: This results in a tungsten copper heat sink of lower density low CTE and excellent thermal conductivity
A:
This results in a tungsten copper heat sink of lower density, low CTE and excellent thermal conductivity.