Essay Towards an Easy and Useful System of Logic (audiobook)

I have ventured to offer this small work to the public with the view of accomplishing two objects; first, to endeavour to impress upon the reader's attention the constituted differences of evidence which exist in the various departments of human knowledge, to which the higher kinds of reasoning are applied; and, secondly, to avoid as much as possible those crabbed and technical words and phrases, so profusely scattered over most of our elementary as well as popular treatises on Logic. The first object, that of pointing out the differences in the evidence on which various subjects rest, must be allowed by all to be an important one.