various examples of double knots and single knots at the end of a bag.
דבר דבר (Dabair Davar): הרהור Hirhurim (Thinking), Part 2;
Pickling Foods, Salting Foods: Is One Allowed to Put Back a Pickle into Its Jar Which Was Taken Out?;
Various Activities to Consider in Relation to the Melacha of Choresh;