This is collection by Allan Ramsay of Scottish songs popular at the start of the 18th century. As there’s no music accompanying the verses we can only really read them as poems. They’re super quaint and the widely recognised Scottish wit is prevalent throughout. At the back of this compilation is an “Explanation of the Scots Words” for the English speaker. The 4th last word under ‘W‘ is surprisingly “Wow!” which is explained as meaning; “wonderful! Id. [idem = the same] ah! This led me to wonder if I should take it as read “wow” was a word of Scottish origin. Google helpfully satisfies that curiosity when you search for “wow definition” by telling us it was “first recorded in Scots in the early 16th century”. I’ve added the screenshot of the information given on this at the bottom of the page.