Dear Nina,

> N: another option: earth device. kasina is a circle used for meditation.
> However, further on,vi~n~naa.nakasi.na (n) meditation subject of
> consciousness is better.

In Sutta 'kasina' does not mean a circular device. I like the Thanissaro
Bhikkhu's translation 'totality'.


[4] "There are these ten totality-dimensions. Which ten? One perceives
the earth-totality above, below, all-around: non-dual, unlimited. One
perceives the water-totality... the fire-totality... the
wind-totality... the blue-totality... the yellow-totality... the
red-totality... the white-totality... the space-totality .. the
consciousness-totality above, below, all-around: non-dual, unlimited.
These are the ten totalities. Now, of these ten totalities, this is
supreme: when one perceives the consciousness-totality above, below,
all-around: non-dual, unlimited. And there are beings who are percipient
in this way.

http://www.accesstoinsight.org/canon/sutta/anguttara/an10-029.html


Evan PED says in connection with this:

Kasi.na1 [Vedic kRtsna] (adj.) entire, whole J iv.111, 112.

Best wishes, Dmytro