Pranayama is the fourth limb of the eight limbs of Ashtanga Yoga mentioned in verse 2.29 in the Yoga Sutras of Patanjali. Patanjali, a Hindu Rishi, discusses his specific approach to pranayama in verses 2.49 through 2.51, and devotes verses 2.52 and 2.53 to explaining the benefits of the practice.
The Communist Manifesto was first published in February 1848 in London. It was written by Marx and Engels for the Communist League, an organisation of German emigre workers living in several western European countries.
FREDERICK ENGELS' pamphlet Socialism: Utopian and Scientific is--alongside The Communist Manifesto--the best short introduction to Marxism. SocialistWorker.org writers introduce 10 of the most important writings by leading thinkers in the revolutionary socialist tradition.