However, most of the provings were done between 100 and 200 years ago, when medical science was in its infancy.
然而，大部分的验证都是在100到200年前做的，当时医学科学尚处于婴儿期。
2
The book does not indicate when or how the original "provings" were done or who reported most of the specific findings.
这本书没有说明这些原始的验证是什么时候做的、如何做的、以及谁报告了这些详细的发现。
3
Such "provings" led him to conclude that belladonna, for example, could be used to treat sore throats because it caused throat constriction in healthy subjects.