The type of source that was used by MacGregor is a proem from the 1800s.
It should be noted that a proem simply means a preface or an introduction in a literary work. In the text, he used a proem from the 1800s.
The purpose of the source which was the proem from the 1800s was to illustrate how tea replaced alcohol. The information is important for readers to understand the main idea in the literary work.
Read related link on:
https://brainly.com/question/16475423
