1. No mere ferule will answer for this offence.

2. The teacher often beat him with a ferule when he was young.

3. The teacher strikes the table with his ferule to quiet the students.

4. The ferule is used for conversion , tonsure, ordination and parlance.

5. His rod and his ferule were seldom idle now -- at least among the smaller pupils.

6. In the investigation, the reasons why cause the sand burning are given by analyzing sand burning sites of LFC ferule and sand burning type, and the prevention measures are proposed.