Note in file with page:

Was found at Agincourt Ge[o]Magnetic Observatory, Agincourt Ontario in 1968.

The Geomagnetic Observatory was terminated operation because of expansion of the 401, at Midland Ave, just east of Kennedy Rd.

I believe the paper was originated by Jackson who ran the geomagnetic observatory in 1926.

You might contact Miss Douglas or ??? Russell.

C. Hodgson.