RESUMO
During the 19th century and part of the 20th, a book of formulas was a useful tool for many Danish pharmacists in their daily work in the pharmacy laboratory. These books were handwritten and contained formulas that supplemented the official formula books, e.g. the pharmacopoeias. They originated from many different sources such as colleagues, the pharmaceutical press, local doctors, veterinarians and dentists. The book of formulas could be a pharmacist's personal document, or it could belong to a pharmacy for general use in the laboratory. The formulas included many drugs, but a number of the products were intended for daily domestic life: ingredients for food and spirits, cosmetics, cleaning and maintenance, etc. Other products were for use by the local hairdresser or photographer, for example. The article provides an overview of 52 formula books in a wide variety of shapes and sizes with instructions for a total of 8,000-10,000 compositions. Part of this large body of practical knowledge by individual pharmacists was collected and published in books in order to be available to all pharmacists. Some of this knowledge was also printed in booklets written for the general public under such pseudonyms as "An old Pharmacist". In the mid-20th century, Sven Holm enjoyed a prominent career as a well-known pharmacist giving advice on the radio and TV and in newspapers and magazines. The need for these formula books declined as pharmacies gradually stopped making up their own medicines towards the end of 20th century and finally ceased altogether in 1990.
