introduction to "קשר של קימא" (the permanent knot).
A Fly in a Big or Small Box. A Fly in a Closet: Is It Okay to Close the Door?;
Reopening a Hole in the Ground That Was There from Before Shabbos;
Blowing Dust Off an Item (e.g., a Shelf, Sefer). Part 2: Spitting into the Air;