Measurement Of Sawed Lumber-Board Measure
Description
This section is from the book "Scientific American Reference Book. A Manual for the Office, Household and Shop", by Albert A. Hopkins, A. Russell Bond. Also available from Amazon: Scientific American Reference Book.
Measurement Of Sawed Lumber-Board Measure
The superficial measure of inch boards is obtained by multiplying the width in inches by the length in feet and dividing by 12. Tables showing the contents of boards of different widths and lengths are published in practically every lumberman's ready reckoner, of which there are many on the market.
The Contents Of Boards Thicker Than 1 Inch Are Obtained By Multiplying The Width In Inches By The Thickness In Inches And The Product By The Length In Feet, And Then Dividing By 12
The Woodman's Handbook.
Hardness Of Minerals | ||
1. | Talc. | Scratched by finger nail. |
2. | ||
3. | Calcite | - Scratched by a knife blade. |
4. | Fluor | |
5. | Apatite | |
6. | Orthoclase | |
7. | Quartz | May be roughly distinguished by a file. |
8. | Topaz | |
9. | ||
10. | Diamond | |
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