What happens if you place a plank over the ditch? and what if there is a haystack between the two courtyards?

Some more discussion of courtyards separated by a wall and then a ditch

Further cases of the inner and outer courtyard before discussing two courtyards next to each other joined by a window

Cases where certain parties did join an eruv/shituf but others did not

A discussion about what is regarded as distinct households for eruv purposes and then we explore what happens if people take food from their father's table to eat in their own home. do they need to make their own eruv contribution?

When can rights be abandoned and a debate about making a shituf with different liquids

Sharing with Sadducees and then what happens if someone doesn't join in an eruv

An eruv in a cave and then sharing courtyards with idolaters

More techum discussion

More discussion of how to measure the techum and then a quick look at shitufei mevo'ot