Wm. K. David’s Secrets of Wise Men, Chemists and Great Physicians (1889) is a compilation of patented formulas, recipes, and practical methods drawn from inventors, chemists, and physicians. The excerpts show a strong emphasis on food preservation—butter, lard, meat, fish, oysters, cider, and fruit juices—using chemical compounds such as boracic acid, paraffine, salicylic acid, and nitrate of potassium. David presents these as inventions with patent numbers and inventor names, suggesting a commercial and legal framing rather than a purely domestic or folk remedy approach.

Patented Preservation Processes

The excerpts detail several patented methods for preserving perishable foods. For example, William Pitt Clotworthy’s patent (No. 284,184) uses paraffine mixed with butter or lard, claiming it is harmless and non-oxidizable. Theodore L. Corwin’s patent (No. 253,983) combines nitrate of potassium, salicylic acid, and chloride of sodium in a solution for meat, fish, oysters, cider, and milk, also serving as a disinfectant. An Ohio inventor’s process for fruit juices involves boiling, filtering through charcoal, mustard seed, and sassafras root, then bottling for a year. These entries reflect a late-19th-century interest in extending shelf life through chemical means, often citing specific patent numbers and inventor names.

Chemical and Technical Formulations

Beyond food, the work includes formulas for technical and chemical preparations. The excerpts mention a boro-phosphate compound for preservation, produced by mixing boracic acid with phosphate and drying at ordinary temperature. The text notes that the dry amorphous salt can be used as a powder or dissolved in water. Other substances like salt and saltpeter may be added. The language is precise, with measurements in ounces, drachms, and scruples, and instructions for grinding, mixing, and applying. This suggests a readership interested in practical chemistry, possibly for home or small-scale industrial use.

Structure and Presentation of Secrets

The book’s structure is a compilation of discrete entries, each presenting a “secret” or method, often attributed to an inventor or patent. The excerpts show a pattern: a heading (e.g., “Preservation of Butter, Lard, Etc.”), followed by a description of the process, sometimes with a patent number and inventor name. The text includes precise quantities and step-by-step instructions. The catalog subjects list magic tricks, inventions, and formulas, but the excerpts focus heavily on food preservation and chemical processes. The “secrets” are presented as practical, patentable knowledge, not esoteric or magical, aligning with the late-19th-century enthusiasm for applied science and invention.

Readers should approach this work as a historical document of applied chemistry and food technology, not a medical or magical treatise. The excerpts reveal a pragmatic, inventor-centric perspective, with an emphasis on patentable processes. The book’s value lies in its snapshot of late-19th-century preservation methods and chemical formulations, many of which may now be obsolete or unsafe. The catalog subjects hint at a broader scope, but the excerpts suggest a core focus on practical, commercial applications.