More on intent when immersing in a mikveh -- and just how far that goes. Specifically, will dunking one hands in a mikveh, for example, render one's hands pure? Or must you have that purification aim in mind at the time of immersion? The rules for Chillun (regular food) vs. sanctified food turn out to be different. Plus, the case of a large enough wave that falls on a person and vessels that need immersion. Also, more on that middle ground of ma'aser, as entailing greater purity than chullin, but less than the kodesh of korbanot. Plus, an investigation into the source of the opinion underlying the mishnah (from a previous daf) - including the issue of the garments of those who are very careful to not come in contact with impurity.