Manduki

There are Sambhavi, Manduki, Aswini, Tadagi, Matangini, Bhuchari, Aghori and various other Mudras. Here I have told you only the important Mudras. For the instructions of all the Mudras, refer to my book "Hatha Yoga." ...

So when you are practising manduki, the concentration on the nose tip and the ingoing breath has to be absolute and total. All the diverse smells can be conceived and cognized. It is not necessary that you smell only sandal or jasmine.

See also: Power, Mudra, Chakra, Swami, Yoga