Schäffer J
Tierarztl Prax. 1985;13(1):131-9.
The classical humoral theory was no unfounded abstraction. On the contrary, it was based on phenomena which led to the recognition of the nature of the most important of the four humors: the blood of sick people differed from that of healthy persons. Examples from the works of the Greek and Roman veterinarians of the period from the 3rd to the 5th centuries A.D. are given, that hematoscopy was also performed by veterinarians. Bloodletting was not only a routinely applied preventive measure or a panacea, but also a prerequisite for hematoscopy, and thus a part of diagnostic.
经典体液学说并非毫无根据的抽象概念。相反，它是基于一些现象而形成的，这些现象使得人们认识到四种体液中最重要的一种的本质：病人的血液与健康人的血液不同。文中列举了公元3世纪至5世纪希腊和罗马兽医著作中的例子，表明兽医也会进行血液检查。放血不仅是一种常规应用的预防措施或万灵药，也是血液检查的先决条件，因此也是诊断的一部分。
