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Apothecaries' fluid and weight system with ounces, drachms, grains, scruples and more.
Apothecaries' Fluid Measure
- 1 U.S. fluid ounce = 8 drachms = 1.805 cubic inch = 1/128 U. S. gallon
- 1 fluid drachm = 60 minims
- 1 British fluid ounce = 1.732 cubic inch
- 1 pound = 12 ounces = 5760 grains
- 1 ounce = 8 drachms = 480 grains
- 1 drachm = 3 scruples = 60 grains
- 1 scruple = 20 grains
Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.
Mass vs. weight - the Gravity Force.
ppm - or parts per million - is commonly used as a unit of concentration.
An introduction to the SI metric system.
Explanation of symbols used as subscripts or superscripts to tell more about the type of chemical reaction, process or condition.
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