New nipples should be boiled for five minutes; but it is unnecessary
to repeat this every day as they soon become so soft as to be almost
useless. After using, nipples should be carefully rinsed in cold water
and kept in a covered glass containing a solution of borax or boric
acid. At least once a day they should be turned wrong side out and
thoroughly washed with soap and water.

_What sort of cotton should be used?_

The refined non-absorbent cotton is rather better for stoppering
bottles, but the ordinary absorbent cotton will answer every purpose.

_Which is better, the Bunsen burner or the alcohol lamp?_

If there is gas in the house, the Bunsen burner is greatly to be
preferred, being cheaper, simpler, and much safer than the alcohol
lamp. If the lamp is used, it should stand upon a table covered with a
plate of zinc or tin, or upon a large tin tray. The French pattern of
alcohol lamp is the best.

_Give the directions for preparing the food according to any of the
above formulas._

The nurse's hands, bottles, tables, and all utensils should be
scrupulously clean. First dissolve the milk sugar in boiling water,
filtering if necessary. Then add the milk and cream and lime-water,
mixing the whole in a pitcher. A sufficient quantity of food for
twenty-four hours is always to be prepared at one time. This is then
divided into the number of feedings required for the day, each feeding
being put in a separate bottle, and the bottle stoppered with cotton.