A Study of American Beers and Ales

In Short

This book is a scientific investigation conducted by the U.S. Department of Agriculture to determine the exact chemical composition of American beers and ales. By partnering with commercial breweries, the authors track the brewing process from raw wort to finished product. The work provides an empirical basis for distinguishing between traditional all-malt beverages and those supplemented with rice, corn, or sugar. It remains a vital primary source for understanding the technical evolution of the American brewing industry and the regulatory efforts to standardize product labeling.

The Story

The narrative begins with a clear, regulatory objective: the Department of Agriculture seeks to establish a reliable method for verifying the purity of American brewery products. The investigators, L.M. Tolman and J. Garfield Riley, recognize that existing scientific literature is insufficient because it focuses primarily on European beers, which are produced using malt types vastly different from those favored in the United States. Furthermore, they observe that most historical data lack a "complete history" of the raw materials used in the wort.

To bridge this gap, the authors move beyond the limitations of small-scale laboratory experiments. They secure access to commercial breweries, allowing Riley to observe the entire manufacturing process—from mashing to fermentation—under real-world conditions. This allows them to collect samples at every stage, ensuring that the history of each brew is documented with absolute certainty. They subject these samples to rigorous chemical analysis, paying particular attention to the fluctuations in protein, ash, phosphoric acid, and dextrin levels.

As the investigation progresses, the authors reveal the fundamental differences between various brewing methods. They discover that during fermentation, significant changes occur beyond the simple conversion of sugar into alcohol, including the development of fixed acids and the measurable loss of protein and mineral components. By calculating these results to a uniform standard—a wort containing 15 percent solids—they successfully create a comparative baseline.

The investigation concludes with a definitive argument: the chemical "fingerprint" of an all-malt beer is distinct from that of a beer produced with adjuncts. The authors demonstrate that the use of rice, corn, or "cerealin" consistently results in a measurable reduction of protein, ash, and phosphoric acid. They also note a broader historical shift, finding that American beers of the era were significantly lighter in alcohol and solids compared to those produced a generation earlier. The report concludes that these specific chemical markers provide a reliable, objective basis for regulators to distinguish between genuine all-malt products and those relying on substitutes, effectively arming the government with the data needed to police product integrity.

How It Unfolds

The research objective The authors define the necessity of the study, noting that foreign data on beer composition do not apply to American products made from different barley varieties. They aim to find a chemical means to identify when cereals like corn or rice are used in place of malt.

The commercial investigation Recognizing that laboratory conditions cannot replicate a brewery, the authors gain access to operating plants to track the brewing process. They document the exact raw materials used and collect samples at every stage of the fermentation cycle.

The chemical analysis The authors apply rigorous analytical methods to measure alcohol, dextrin, and mineral content in worts and finished products. They develop a specific factor to account for the loss of solids during fermentation, allowing for accurate comparisons across different brews.

The comparative findings By calculating all data to a uniform 15 percent solids basis, the authors isolate the impact of adjuncts on the finished beer. They show that protein and phosphoric acid levels drop sharply when substitutes are added, providing a clear way to detect these additives.

The final assessment The authors confirm that their data can distinguish between all-malt and supplemented beers with high accuracy. They conclude by contrasting current brewing trends with 1887 data, confirming a measurable decline in the overall strength and solids content of American beer.

The People

L.M. Tolman and J. Garfield Riley act as the central investigators, serving as the bridge between the government laboratory and the commercial brewery. Their motivation is primarily one of scientific accuracy and consumer protection; they seek to replace hearsay with empirical evidence. They are meticulous, often highlighting their own methodological choices and correcting errors in previous literature, such as their refinement of the calculation factor for dextrin. They do not view themselves as critics of the brewing industry, but rather as observers tasked with documenting the "true conditions" of production. Through their eyes, the American brewer is a figure navigating a changing landscape where high-protein barley and cost-effective substitutes define the character of the product. The brewers themselves, though not named individually, are the silent partners in this study, providing the "complete history" of their worts and allowing the investigators to peer into their vats to establish the chemical reality of their craft.

In Its Own Voice

The main object of this investigation was to find, if possible, a means of distinguishing beers and ales made entirely from malt from those made from malt together with other cereal products, such as rice, corn, and cerealin.

The authors clarify that the investigation is driven by the need to distinguish pure malt products from those containing adjuncts.

The all-malt beers made in this country contain higher percentages of protein than the all-malt beers made in Europe, owing to the use in this country of a barley high in protein.

The authors explain why American all-malt beer possesses a distinct chemical profile compared to European varieties.

What It's Really About

At its core, this work explores the tension between traditional craft and industrial efficiency. It interrogates the question of "authenticity" in a food product by attempting to define it through precise chemical markers rather than subjective taste. The book argues that transparency in manufacturing can be enforced through scientific measurement. It raises the underlying question of whether the quality of a beverage is determined by its raw materials or its final chemical profile. By tracking the decline in solids and alcohol over several decades, the work also serves as a study of the changing American palate and the economic pressures that forced brewers to innovate away from expensive, all-malt recipes toward more cost-effective, multi-cereal brews.

Why Read It Today

Readers interested in the history of food science or the development of American industry will find this a fascinating, albeit dense, document. It offers a clear, no-nonsense look at how the government began to exert authority over the manufacturing sector through chemical analysis. There is no marketing hype here; the prose is clinical, utilitarian, and deeply grounded in the reality of the 1910s.

However, the reader must be prepared for a technical experience. The book is dominated by massive, complex data tables and detailed descriptions of titration and ashing methods. It does not contain narrative flair or anecdotes about the social life of the era. It is a work for the curious researcher or the dedicated brewing historian who wants to understand the exact technical standards of a bygone age. The language is formal and occasionally dry, reflecting the bureaucratic tone of the Government Printing Office. You will not read this for the story of the people in the breweries, but for the story of the beer itself—its proteins, its sugars, and the precise, invisible markers that define its identity. It is a reminder that the "craft" of brewing has always been accompanied by the cold, hard precision of the chemist.