Episode 6 — The Model Travels

The model traveled before its meaning was settled. In 1915, C. H. Bailey ran fifteen rabbits at Stanford across egg yolk, purified cholesterol in cottonseed oil, and oil alone — the vehicle control took more oil over more days than any cholesterol-fed animal and developed nothing — establishing that the result survived a control and followed the exposure, while also making the systemic character of the rabbit’s disease impossible to ignore. Then 1924 produced four answers in one year: Lange placed altered wall-fluid transport first; Aschoff placed mechanical loosening first and made the physicochemical structure of the plasma decide what precipitated; Schönheimer read the rabbit as a genuine experimental cholesterol disease whose transfer to human etiology remained unproved; Anitschkow answered with duration, prior exposure, clearance, and transport form. Zinserling’s Sudan stain then found intimal lipid in 95.5 percent of 302 childhood aortas, moving the apparent beginning of the disease backward without showing what every early deposit became. Fischer-Wasels and Jaffé assembled the exposure–transport–retention system and stated plainly that concentration was not enough, while Beitzke put focal injury beneath the intima first and refused the settlement. By 1928 the field largely agreed about the material and not about the system — and the object circulating in the blood was still chemically obscure.