I have my little "Maternal and Child Welfare Service" notebook from when I was a baby. We are talking last half of the 1960s.
Listen to these gems....
NOTE - DO NOT TRY THIS AT HOME. THIS INFORMATION IS VERY DATED! I AM SERIOUSLY OLD AND SOME OF MY PROBLEMS ARE PROBABLY DUE TO THIS ADVICE.

- at approx 3 weeks of age:
"Delrosa 5 drops in 2 tablespoons boiled water. Increase delrosa twice weekly by 5 drops until having two teaspoons in 2 tablespoons boiled water". - Delrosa was a rosehip vitamin C drink. I was actually a breastfed baby.
- at one month old:
"Vegemite size O (circle drawn on the paper) in one tablespoon boiled water. Increase vegemite gradually up to 1/4 teaspoon at 3 months"
- at 2 1/2 months:
"Cows milk 3 ounces in boiled water with 2 teaspoons sugar"
- at 3 1/2 months:
"Raw egg yolk daily. Commence with one drop and increase by one drop each day up to 1/4 teaspoon then increase by 1/2 teaspoon weekly until having whole yolk daily. No egg white."