Contemporary specimens of compositions, accompanied by explanatory or supplementary letters by the authors themselves, describing their methods, habits of writing, revisions, etc. cf. Pref
A high-school astronomy : in which the descriptive, physical, and practical are combined with special reference to the wants of academies and seminaries of learning
Elementary and practical arithmetic : in which have been attempted various improvements in arrangement and nomenclature, as well as in the means of thorough discipline in the principles and applications of the science