| Letter | Year |
|---|---|
| January 1950 – Vol. 31, No. 1 – Crusade For Health | January 1950 |
| December 1949 – Vol. 30, No. 12 – Why Follow Precedent? | December 1949 |
| November 1949 – Vol. 30, No. 11 – A Story of Oil | November 1949 |
| October 1949 – Vol. 30, No. 10 – Our Climate And Our Weather | October 1949 |
| September 1949 – Vol. 30, No. 9 – Let’s Slow Down | September 1949 |
| August 1949 – Vol. 30, No. 8 – Our Liberties | August 1949 |
| July 1949 – Vol. 30, No. 7 – Radio And Society | July 1949 |
| June 1949 – Vol. 30, No. 6 – Canada Is A World Customer | June 1949 |
| May 1949 – Vol. 30, No. 5 – When You Are On Your Own | May 1949 |
| April 1949 – Vol. 30, No. 4 – This Matter of Efficiency | April 1949 |