Following on Boegenhold's reference to Fleck, apart from Kuhn's general introduction to the English edition of Fleck's book, the best current discussion and assessment of Fleck's book in English appears in Barbara Herrnsteins Smith's "Netting Truth" in the Publications of the Modern Language Association (PMLA), Vol. 115, No. 5. (Oct., 2000), pp. 1089-1095. (A more complete version of that paper will appear as Chapter 3 in the book Scandalous Knowledge: Science, Truth, and the Human, to be published later this year by the University of Edinburgh Press, and in North America by Duke University Press for the series Science and Cultural Theory, which I co-edit.) Briefly per this thread, Fleck's views on scientific practice invoked and involved "thought styles" ("Denkstilen") and "thought collectives" ("Denkkollectiven"). E. Roy Weintraub