Litterary presentation of the various effects that semiotics of scientific texts have come to recognize; explores the distinction between fiction writing and fact writing.

Compares systematically accounts of the origins of humanity in classic texts (Hobbes, Rouseau) and in modern scientific ones (sociobiology) and offers a way of classifying the discrepancies between accounts.

Now that field studies of laboratory practices are starting to pour in, we are beginning to have a better picture of what scientists do inside the walls of these strange places called 'laboratories' (Knorr-Cetina, this volume). But a new problem has emercged. If we are not able to follow up our participant-observation studies far enough to take in questions outside the laboratory, we are at great risk of falling back into the socalled 'internalist' vision of science. From the very beginnings of these microstudies, this criticism was levelled at us by scholars preoccupied by lalger problems such as science policy, history of science, or more broadly, what is known as Science, Technology and Society (STS). For such topics, laboratory studies seemed utterly irrelevant. At the time, our critics were largely wrong because we first of all had to penetrate these black boxes, and to get firsthand observations of the daily activity of scientists. This was the foremost priority. The result, to summarize it in one sentence, was that nothing extraordinary and nothing 'scientific' was happening inside the sacred walls of these temples (Knorr, 1981). After a few years of studies, however, our critics would be right in raising again the naive but nagging question: if nothing scientific is happening in laboratories, why are there laboratories to begin with?

By following step by step the research program of a chemist manufacturing analogs of a brain peptide the articles explores an alternative vocabulary that would describe the research process without using the traditionnal epistemological terms.