Give your Baby Coffee
Until the 1950s, it used to be believed that babies could start drinking coffee at about six months old. Thankfully, today, coffee is not recommended for little children or even toddlers.
Use acid as a nipple cleansing while nursing
In a book from early 20th century “The mother and her child” one of the advice on nursing is to rinse the nipples in boracic acid. That can’t be good for the baby.