We’ve previously seen a 1949 edition of the California Zephyr‘s along-the-way booklet. The basic site-by-site text is the same with the addition of scheduled times, both eastbound and westbound, at each of the cities or sites.
The 1955 booklet manages to fit the same guide in about two-thirds of the space (16 half pages instead of 12 full pages), mainly by using fewer and smaller graphics. The 1955 booklet also manages to squeeze in a guide to taking photos from the dome cars, including a recommendation that those shooting color photos use a CC30-R filter plus a no. 85 daylight filter for those shooting Kodachrome. Such filters are still available today, but the same results can be obtained using Photoshop.