Add 1 gr. or 1 m. to 1 ounce of water.
Add 15 “ 15 “ 1 pint “
Add 30 “ 30 “ 1 quart “
Add 120 “ 120 “ 1 gallon “
To make 1 : 1000 sol. take 1 part of 1.500 sol. and 1 part water.
To make 1 : 2000 “ 1 “ 1.500 “ 3 parts water.
To make 1 : 4000 “ 1 “ 1.500 “ 7 “
To make 1 : 5000 “ 1 “ 1.500 “ 9 “
To make a 1: 500 solution of formaldehyd add 38 minims of formalin (a
40 per cent. solution of formaldehyd) to 1 pint of water.