In the following sentence, "all" qualifies both "tracts" and "pamphlets," and thus joins them closely.
My unbound books, and all my tracts and pamphlets, are to be tied up with pink tape.
(e) When "and" occurs only between the two last words of the series, the comma is usually inserted before it.
Trumpets, drums, and kettle-drums, contended in noise with the shouts of a numerous rabble.
Many writers omit this comma. But it seems useful in order to make the previous rule (d) effective.
2. When "and" joins two phrases, a comma generally precedes it.
The ceremony was performed in the accustomed manner, and with due solemnity.
If, as in the following sentence, a preposition is common to two phrases, and is not repeated in the second, no comma is used.
With proper care and good instruments, the work may be successfully carried out.
3. When "and" joins two clauses, the preceding point may be the comma, the semicolon, or even the full stop. Which point is right in any particular case, will depend upon considerations set out in other rules.