Introduction to Ethical Studies: An Open Source Reader | ||
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Marxists Internet Archive . Marxist Writers and History. Comprehensive reference and sources for the philosophy of Marxism—useful for many online sources not available elsewhere.
Cosmology Today. A series of accessible articles by scientists on the present and future state of science including present concerns of "a theory of everything"
Mechanical Equivalent of Heat, from Denison Olmsted, An Introduction to Natural Philosophy, 1844, 341.