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The Main Rules Collection (5130)
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629 Health thumb thumb thumb thumb thumb
PROTECTING YOUR LUNGS
Every hour you spend in a smoky bar is equivalent to smoking one or two cigarettes.
Rick Rosner, bouncer and stripper, New York, New York
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 5.2 out of 10 based on 23 reviews
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630 Cattle thumb thumb thumb thumb thumb
CASTRATING CALVES
Castrate a calf when his testicles are the size of a squirrel's head.
Jim Crissman, veterinary pathologist, Midland, Michigan
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 5.2 out of 10 based on 17 reviews
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631 Precipitation thumb thumb thumb thumb
PREDICTING RAIN
The number of stars visible inside the ring around the moon is the number of days before rain.
Glenn Saha, builder
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 4.2 out of 10 based on 14 reviews
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632 Hiking thumb thumb thumb thumb thumb
PLANNING A HIKE
To estimate your hiking time, figure half an hour for each mile plus half an hour for each 1,000-foot increase in altitude.
Pierre Gremaud, Waitsfield, Vermont
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 4.9 out of 10 based on 15 reviews
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633 Automobiles thumb thumb thumb
CHANGING YOUR OIL
If your car holds 5 quarts of engine oil or more, change the oil every 3,000 miles. For every half quart less than 5 that your engine holds, decrease your between-change mileage by 500. For example, a car that has an oil capacity of 3 and a half quarts should have its oil changed every 1,500 miles.
Will Parker, Georgian music authority
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 3.2 out of 10 based on 31 reviews
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634 Conversations thumb thumb thumb thumb
REMEMBERING NAMES
If a person whose name you should know but can't remember is approaching you, relax. When the person has come within three feet of you, you will remember the name.
Eleanor Benelisha, library and information services, Richmond, California
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 3.7 out of 10 based on 27 reviews
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635 Animals thumb thumb thumb thumb thumb thumb thumb
IDENTIFYING SEA MAMMALS
Fish have vertical tails. Mammals have horizontal tails.
Paul A. Delaney, meteorologist, Beltsville, Maryland
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 6.6 out of 10 based on 31 reviews
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636 Building thumb thumb thumb thumb thumb
DESIGNING A HOME
Architects design homes to last about 50 years. Technological advances and social change make houses obsolete after that length of time.
Dean Sheridan, electronics technician and deaf actor, Torrance, California
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 4.7 out of 10 based on 19 reviews
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637 Computers thumb thumb thumb thumb thumb thumb
PROTECTING YOUR EYES
To protect your eyes from strain, make sure the screen is just beyond arm's length when you work on a computer.
Dean Sheridan, electronics technician and deaf actor, Torrance, California
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 6.1 out of 10 based on 28 reviews
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638 Editing thumb thumb thumb thumb thumb
EDITING A NEWSPAPER
Kill everything that you don't understand.
Joel Garreau, editor, The Washington Post
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 5.3 out of 10 based on 19 reviews
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639 Children thumb thumb thumb thumb
RAISING CHILDREN
An umbilical hernia that has not closed spontaneously by the time a child is 4 will require surgery.
Dean Sheridan, electronics technician and deaf actor, Torrance, California
(LR) Legacy Rule of Thumb from previously published collections
Current Rating: 4.3 out of 10 based on 18 reviews
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