R.D. 2, Galveston, Indiana 46932
I see on page 22 of May-June 68 issue you ask about the Bryant steam tractor. I saw one at Indiana State Fair. They also had a big truck and a car with that same kind of boiler and engine in all three. They were made at Peru, Indiana in the 1920's.
As far as I know, they quit in early 1930's during the depression years. I never saw one in use but it looked like a powerful machine and in cold weather could be filled with cold water and steamed up in 15 minutes or less and would not freeze while on road. I didn't see the tractor run but the truck was going. No noise, no vibration. Of course, it often took me longer than that to start my Ford.
I also notice some of the late Advance engines are on a Rumely boiler. And the Gaar-Scott with rear mounted steel wheels are on Rumely wheels and boilers. They are Gaar-Scott-Rumely.
I was told Gaar-Scott was the best low pressure engine known in this part of corn belt, and they had good boilers too. The man I worked with said the return flue boiler drew better than straight flue. I had an old Advance. It steamed good enough but that valve gear was only a time gear. Often I wanted more steam in cylinder but couldn't get it. To slow it down to a stop, it would rock instead of stop when steam was up 1 couldn't have any. I bought the Aultman-Taylor no. 9178 and never wanted to bother the Advance again.
I ran several others, but I liked A & T the best. They are gone to the junkyards long ago.