[INDOLOGY] help with signs in devanagari text

[François Patte]

Bonjour,

In an Adyar library edition of Saṃgītaratnākara, I found this sign (see
attached document).
I would like to know:
1- what is this sign?
2- what is its unicode code?
3- how to read it?

Thank you for helping.
-- 
François Patte
UFR de mathématiques et informatique
Laboratoire CNRS MAP5, UMR 8145
Université Paris Descartes
45, rue des Saints Pères
F-75270 Paris Cedex 06
Tél. +33 (0)6 7892 5822
http://www.math-info.univ-paris5.fr/~patte
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