The Upanishads, Part 1 (SBE01), by Max Müller, , at sacred-texts.com
1. Sthavira Sâkalya said that breath is the beam 2, and as the other beams rest on the house-beam, thus the eye, the ear, the mind, the speech, the senses, the body, the whole self rests on this 3 breath.
2. Of that self the breathing is like the sibilants, the bones like the mutes, the marrow like the vowels, and the fourth part, flesh, blood, and the rest, like the semivowels 4,--so said Hrasva Mândûkeya.
3. To us it was said to be a triad only 5.
4. Of that triad, viz. bones, marrow, and joints, there are 360 (parts) on this side (the right), and 360 on that side (the left). They make 720 together, and 720 6 are the days and nights of the year. Thus that self which consists of sight, hearing, metre, mind, and speech is like unto the days.
5. He who thus knows this self, which consists of sight, hearing, metre, mind, and speech, as like unto the days, obtains union, likeness, or nearness with the days, has sons and cattle, and lives his full age.
257:1 In the first adhyâya meditations suggested by samhitâ, pada, and krama have been discussed. Now follow meditations suggested by certain classes of letters.
257:2 Ait. Âr. III, 1, 4.
257:3 The Kashmir MS. reads etasmin prâne. The self here is meant for the body, and yet it seems to be different from sarîra.
257:4 The Kashmir MS. writes antastha without visarga, while it is otherwise most careful in writing all sibilants.
257:5 Sâkalya, as we saw, told his disciples that there were three classes only, not four. Comm. The Kashmir MS. reads trayam tv eva na ityetat proktam.
257:6 The Kashmir MS, reads sapta vimsatis ka satâni.