Blurb:

This chapter is a detailed case study of how a physicist changes his grammatical subject representations in two research articles published within a decade of each other in international refereed journals. Grammatical subject is crucial when composing texts as it represents the nub of the argument: ‘something by reference to which the proposition can be affirmed or denied’ (Halliday 1994: 76), and is the element ‘on which the validity of the information is made to rest’ (Halliday 1994: 76).