Pasteur publishes Études sur la bière on yeast, spoilage, and brewing practice

In 1876 Louis Pasteur published Études sur la bière, ses maladies, les causes qui les provoquent, procédé pour la rendre inaltérable, a book on yeast, contamination, and methods meant to stabilise beer. It is not the 1865 wine report and not a vaccination trial. The technical claim is that specific organisms and oxygen/contamination conditions explain beer diseases, and that brewing can be made more controllable.

Context

After 1870 Pasteur mixed laboratory pride with national rivalry. The beer book is both a microbiology treatise and a patriotic industrial brief. That nationalist framing is stored more sharply on a separate polarisation row. Hansen’s later pure-culture yeast work in Copenhagen is not erased and is not this book. Printers, brewers, and assistants shared the object. Sharing does not erase Pasteur’s title page.

The contribution type is direct. That reading is an impact-path choice, not a property stored on the Fact itself.

Why it matters

Industrial-microbiology path. Modest weight: a book is not a brewing monopoly. High confidence on the 1876 publication date.

Shared responsibility is part of Pasteur publishes Études sur la bière on yeast, spoilage, and brewing practice. Naming Louis Pasteur does not delete co-authors, institutions, or later transmitters. The lag from 1876-01-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.