Introduction
Musical form is often discussed by appealing to metaphors that compare formal sections either to types of containers or to segments of journeys. Although both metaphors are usually combined and used interchangeably by most music analysts, since the nineteenth century container metaphors for form have tended to dominate. This contrasts with what was witnessed during the eighteenth century, where journey metaphors for musical form were more prevalent. The introductory chapter broadly compares container metaphors and journal metaphors for form, especially as they apply to sonata-form expositions in works composed during the Galant era. This chapter also introduces some of the features that tend to distinguish eighteenth-century formal discussions from modern ones, and it concludes with a preview of some of the strategies to be explored in subsequent chapters.