| White of one egg; | |
| Water, | ℥viij; |
| Pinch of salt. |
Add white of egg to cold boiled water and pinch of salt. Shake thoroughly or break with fork and strain through one thickness of gauze to remove froth.
LACTOSE SOLUTION.
To each ounce of milk-sugar add 1½ ounces of water (boiled).
Heat until all the sugar is dissolved.
Filter, put in a sterile bottle, plug with sterile absorbent cotton, and put on ice.
Use ℥iss for every ounce of sugar ordered.
Subtract this amount from the total amount of water ordered.
PARTIALLY PEPTONIZED MILK.
| Milk, | Oj; |
| Water, | ℥ij; |
| Peptonizing powder, | 1 tube. |