West Bengal Chief Minister Mamata Banerjee on Tuesday installed a new bust of 19th century social reformer Iswhar Chandra Vidyasagar at the college in Kolkata where an old one was vandalised last month.  <br />''<br />''She also unveiled an 8.5-ft pristine white fibre-glass statue of Vidyasagar in the courtyard of the college.<br />''<br />''Eminent poets, writers and senior ministers were also present at the programme.<br />''<br />''<br />