In this paper, we articulate notions that enable the organization of an analytical device for reading comprehension of different types of productions. Our considerations about these notions are based on discourse analysis from Michael Pêcheux through Eni P. Orlandi publications in Brazil. We present examples about Science, particularly Physics, in order to show that coursebooks, scientific popularization or scientists' original publications are not read in the same way. Even if the readings are performed by the same individual, we argue that these readings mobilize different interdiscourses asthey assume different imaginary.
analytical device; discourse analysis; Physics
