When on earth was this published??
I collect vintage dog care & training books, many of the old ones (pre-1950) suggest stuff like this. But that way of "training" has been frowned upon for decades.
I took a few ob courses with an old style trainer. Very nice lady. She even offered me a sort of job helping her with classes. But while she didn't hit any dogs - that I saw - her methods were archaic & not as effective as they could have been, And her own dogs were lacking in confidence & a bit hand shy...
She'd even titled dogs to the UD level, but I don't think her dogs were very happy or enthusiastic workers.
I'll do a search on that book on amazon.