An instance of how Galileo attempted to address these issues is provided by his investigations of free fall, which were carried out in the early years of the seventeenth century and published many years later in his Two New Sciences (1638). In that work he did not whatprovide any circumstantial information about the particular experiments he had performed with rolling balls on incline planes. Furthermore, he did not report the specific results he had obtained. Rather he gave a generic description of the experimental setup and pointed out that the results conformed repeatedly ("a full hundred times") to he had anticipated.