Sentence:  During the whole time of his abode in the university he generally spent thirteen hours of the day in study; by which assiduity besides an <WSD>exact</WSD> dispatch of the whole course of philosophy, he read over in a manner all classic authors that are extant... 
Meaning of the word marked with <WSD> tags:  Habitually careful to agree with a standard, a rule, or a promise; accurate; methodical; punctual.