sentences:  In Paris Sachs displayed great activity in various branches of Hebrew literature, but as he occupied himself with different subjects at one and the same time, most of his works remained unfinished.While in Berlin he had begun to edit literary periodicals, the first of which was "Ha-Teḥiyyah," treating chiefly of medieval religious philosophy.Only two numbers were issued, the first in 1850 and the second in 1857.