I’m not aware of any ingredients that would not be available.
The main thrust of this particular baking book was to promote the value and convenience of double acting baking powder.
Try one of the cake recipes that allows you to mix and refrigerate the batter and bake it off several hours or a day later. That wouldn’t be possible using baking soda and cream of tartar as called for in many old recipes.
Date Surprises on page 56 using date filling on page 60. We made them as small hand pies and also as date pinwheels. The pinwheels always were part of our Christmas cookie platters.
We also made the Rolled Butterscotch Cookies in page 60 as ice box cookies. Thin slices bake off crispy while thicker slices bake off more crumbly and tender. We liked them thicker but it’s easy enough to experiment until you find something that suits you.
Try any of the icebox cookie recipes on pages 60-61.
Many old time cooks kept a wax paper roll or two of cookie dough in the fridge to bake off for company, very similar to today’s refrigerated cookie dough tubes from the dairy case.