Tosfos says in the case where the Eruv is in the tree below ten, the concept of ‘Ho’il’ (since it can be potentially transported in increments of less than four ammos) can be applied without any concern, as opposed to the case of the Eruv in the basket. What is the difference?
Tosfos disagrees with Rashi’s allowance (according to Rebbi) to carry the Eruv incrementally through R”H. If so, according to Tosfos why is the Eruv (in the tree below ten tefachim) valid?