These are the balance of the pages in Book No. 4 plus some supplemental sheets.
While the "Elevated Car Trucks" were intended for the Chicago Rapid Transit (CRT)/Chicago Transit Authority (CTA) 4000 cars there were other CRT/CTA cars these trucks could be used for.
The addition of the wheel guards to these trucks made these trucks the true North Shore Line standard trucks. Note the underbody detail is mounted on a brass plate which in turn is mounted to the bottom of the model.
Perhaps most interesting is this flyer which was not an official part of "Truck Book No. 4". If you recall in the inside cover of this catalogue was an "Editorial" which mentioned Rich's health problems. Rich had suffered a cardiac arrest (heart attack). This flyer was for a copy power truck to replace Wagner power trucks. HO parts were used. The motor is from an HO diesel locomotive. It used a plastic worm. The spring belt between the pullies was rubber. This power truck did not operate as good as a Wagner. I bought one. It worked but it wasn't the same as a Wagner. It's still in my parts bin.
Cheers,
Ed