author
A teacher and education writer from the early 20th century, best known for practical books on logic and arithmetic written for the classroom. His work focused on helping students and teachers think clearly, reason carefully, and connect learning to everyday teaching.

by George Hastings McNair
George Hastings McNair was an educator and author whose surviving catalog records point to a career centered on teaching and school instruction. He is credited with works including A Class Room Logic: Deductive and Inductive, with Special Application to the Science and Art of Teaching and Methods of Teaching Modern Day Arithmetic.
Those titles suggest the kind of writer he was: practical, methodical, and deeply interested in how students learn. Rather than writing for a general literary audience, he appears to have written for teachers and learners, using subjects like logic and arithmetic to strengthen clear thinking in the classroom.
Little biographical information was readily confirmed in the sources I found, so much of his life remains obscure. Even so, the books linked to his name show a clear commitment to education and to making reasoning a useful part of everyday teaching.