I quite like the crisp rationality of the text typeface used in this book, but I can't identify it. I suspect it's a Linotype machine face, judging by the buttonhook 'f' and the overly wide italic.
http://www.iampeth.com/books/palmer_method_1935/palmerMethod_1935_page2....
I particularly like the 'g', which strikes me as rather distinctive.