The document that follows is dated January 30, 1895. It is carefully handwritten with an almost perfect calligraphy. It is worth to point out that when the document was drafted, calligraphy was a basic requirement in education. The document, with all its grammatical and spelling shortcomings, most have been a sort of vademecum (an inseparable booklet) for the person who had so meticulously written it. In fact it contains most of the rules for calculating plane geometry measures, but even and especially those of land measures. As far as we know, the document was owned by someone considered one of the most "educated" persons in town. His "education" was especially respected because he was essentially involved in all the controversies dealing with land partition. The document consists of about thirty pages, of which we present here only the beginning section. In the future, only other sections, which we consider most interesting, will be published.