If alembic is viewed as a distillation, then what kind of distillation do we have here from tswum's paste:

The cool and procrastinating alembic of Dyer's Weekly Letter. ??

A cool distillation seems heady and controlled, but procrastinating? To or for whom? Was Dyer's letter of such interest and so highly distilled that it caused readers to procrastinate their ordinary duties while reading Dyer instead?

Hating to miss the obvious,
WW