Ganz trefliche höchstgeheime Wissenschaften, und vollkomene Explicirung der höchst nutzbaren edlen Bierbräukunst.
4to (170 x 195 mm). German manuscript on paper. (2), 86 pp. (66f. and 70f. blank). Contemporary boards with cover label, dated "1786".
A brewer's copious recipe book in six chapters. Contains not only instructions for cleaning the barley and for preparing and fermenting malt, but also "secret articies" and "excellent arcana", such as "how to render a beer gone full sour quite pleasant once more". The principal text comprises pages 1 through 63 of the manuscript, paginated by an early owner; it is written by a single hand throughout in well-legible German cursive, including the three-page panegyrical preface. According to a note on the half-title (dated 15 Feb. 1786), the recipe book was compiled by Gregor Welhorn, "burgher and beer brewer in the electoral capital and fortress city of Ingolstadt". The original author, however, is revealed by the preface to have been Melchior Schlögl, "professor", "praxator peritissimus" (well-experienced brewer) and "one of Germany's most eminent brewing masters", who had written the book "with all its secret artifices and principal arcana for himself and his own use", "all described in the most minute detail in the year 1782". This "famous frater" is said to have been the brother of Vicelinus Schlögl, one of the "most eminent professors" - that is to say, of Anton Vicelinus Schlögl (1743-1811), a baker's son who was educated at the convent of the Augustinian Canons Regular at Polling near Weilheim and became professor of mathematics and physics at the University of Ingolstadt. The brewer Melchior therefore must be his younger brother (1752-88), a Canon Regular who took the monastic name of "Quarinus" and taught physics at the Upper Bavarian monastery Rottenbuch, undertaking meteorological investigations at the Hohenpeißenberg observatory (cf. Poggendorff II, 805).
The final leaves contain additional notes, apparently mainly dating from the 1790s, concerning the purchase of malt (along with other expenditures), further brewing recipes, or a recipe for driving away flies and mosquitos. A curious entry mentions the repudiation of the writer's wife after a mere three years of marriage: "on this same Saturday after St Willibaldus in 1797 I took her to her parents, but not on account of the magistrates, rather all by myself I did this" (p. 68).
Binding rubbed and bumped; wants spine. Some browning and brownstaining. Sewing somewhat loosened near beginning; two leaves cut out between pp. 82 and 83 (pre-dating the pagination).