28 SOCIAL SCIENTIST on his own position in the natural world, was first developed by Communists." ("That's Life/' New Tork Review oj Books, 29 February 1968, p 19). 81 Engels, Anti-Duhring, op cit,, p 36. a5 Ibid., D 33. 20 Engels, Dialectics of Nature, Progress Publishers, Moscow 1966, p 69. 87 Engels, Preface to the second edition of Anti-Duhring, op. cit., pp 16-17. 88 Engels, Dialectics of Nature, op. cit., pp 243-256. 39 Ibid., p 249. 80 Ibid., p 69. 81 Ibid., p29. 8a Ibid. 88 Ibid., p 30. 84 Ibid. 85 Ibid., pp 30, 199, 253 and 296-303. 8fl Ibid., p 297 87 Ibid. 88 Oparin, op. cifc., pp 76 and 87. 89 Ibid., pp 8-1 and 92. 40 Engels, Dialectics of Nature, op. cit., 250 and 282-283. 4 l Engels, Anti-Duhring, op. cit., p 101. 42 Ibid. 4 8 Engels, Dialectics of Nature, op. cit., p 39. 44 Ibid., p 301. 45 Oparin. op cit., pp 230-231 and 348-349. 4 6 Engels, Dialectics of Nature, op. cit., pp 198-199. 47 Ibid., pp 301-302. 48 Engels, Anti-Duhring, op. cit., p 101. 49 VI Lenin, Collected Works, vol 14, Progress Publishers, Moscow 1968. 60 Lenin, Collected Works, vol 38. 51 Lenin, "Materialism and Empiric-Criticism^ Collected Works vol 14, p 306 and 313. 6 2 Engels, Ludwig Feuerbach and the End of Classical German Philosophy, Progress Publishers Moscow 1969, p 23, quoted by Lenin, op cit., p 251. 58 Lenin, op. cit., p251. 84 Ibid , pp 103-104. s° Ibid., p 185. 56 Engels, Dialectics of Nature, op. cit., p 231; Lenin, op. cit., pp 129, 135-136 and 138-143. 87 Lenin, "Philosophical Notebooks,'* Collected Works, vol 38, p 256. 58 Ibid., pp 221, 255-256 and 359-360. 89 Lenin, Materialism find EmpirwCriticism, op. cit., p 75. eo Ibid., p 46. ^ Ibid.,p 156. 62 Hsu Kuang Hsicn, "Dialectical Materialism in the Analysis of Molecular Structures5, Hungchi, no 9, Peking 1965. 68 Oparin, op. cit., pp 92-98. ®4 The opinions of both Belyaev and Schafcr arc cited by Oparin, op. cit., pp 92-93. eB Oparin, op. cit., p 75. 66 R W Chambers and A S Payne, From Cell to Test Tube: The Science of Biochemistry, John Murray, London 1961, p 58. 67 Ibid., p 64. 68 Ibid., pi 72. 69 Ibid., p 10. 70 A 1 Oparin and V Fesenkov, The Universe, Moscow 1960, p 19-22. 7 * Ponnamperuma, op cit., pp 156-158.