Wednesday Sh'vat 7 5703
Torah lessons: Chumash: Bo, Revi'i with Rashi.
Tehillim: 39-43.
Tanya: Ch. 18. To explain (p. 75)...incorporated in it. (p. 75).

When the Alter Rebbe was nine he studied geometry and astronomy. At ten he composed a calendar for fifteen years. When he was twelve years old, it happened that he lectured publicly on Rambam's laws of kidush hachodesh.1 The preeminent Torah-scholars who were present at that time in the study-hall were utterly overwhelmed.