Reference for Eruvin 175:8

ורב לטעמיה דאמר רב אין אדם אוסר על חבירו דרך אויר

hence we were informed [that the same law is applicable to both cases]. SO ALSO WHEN TWO BALCONIES WERE SITUATED IN POSITIONS ONE HIGHER THAN etc. R'Huna citing Rab explained: This was learnt only [in the case where the lower balcony] was near [to the upper one],<span class="x" onmousemove="('comment',' Sc. the horizontal distance between them was less than four handbreadths.');">¹⁷</span> but if it was removed from it,<span class="x" onmousemove="('comment',' Four handbreadths or more.');">¹⁸</span>

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