This section is from the book "A Text-Book Of Materia Medica And Pharmacy For Medical Students", by Velyien Ewart Henderson. Also available from Amazon: A Text-Book of Materia Medica and Pharmacy for Medical Students.
1 minin is the volume at 62°F. of 0.9114 grains of distilled water.
1 fluid drachm is the volume at 62° F.of 54.6875 grains of distilled water.
1 fluid ounce is the volume at 62° F. of 1 oz. or 437.5 grains of distilled water.
1 pint is the volume at 62°F. of 1.25 lb. or 8,750 grains of distilled water.
1 gallon is the volume at 62° F. of 10 lb or 70,000 grains of distilled water.
109.71 min. (approximately 110 min.) is the volume at 62 F. of 100 grains of water.
The more modern and convenient system adopted as an alternative system in galenical operations by the Pharmacopoeia and as the preferred system in the British Pharmaceutical Codex, and in the Pharmacopoeia of the United States of America, is the Metric System. It is the sole system in use throughout Europe, and will doubtless be adopted as the preferred system in the next revision of the British Pharmacopoeia.