Message:

<p>[QUOTE=&quot;hontonai, post: 593396, member: 4703&quot;]When I was a schoolboy in the &#039;30s, <ul> <li>avoirdupois ounces (16 to the pound) were 437.5 grains and used to measure the weight of all common objects</li> <li>troy ounces (12 to the pound) were 480 grains and used to measure the weight of precious metals; and</li> <li>grams (1,000 to the kilogram) were part of the completely separate Metric System in which the unit &quot;grain&quot; did not exist.</li> </ul><p>When did that change, and how does a metric ounce compare to an avoirdupois ounce?[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in