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The Main Rules Collection (5130)
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940
Illness
MEASURING BLOOD GLUCOSE
In patients with high blood glucose, the true value of their serum sodium is approximated by subtracting 100 from the measured glucose, multiplying the result by 1.6, and adding this result to the measured serum sodium in mg per deciliter.
John H. Bloor M.D., Ph.D., Buffalo, New York
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
4.3
out of
10
based on
14
reviews
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941
Health
WATCHING YOUR BLOOD PRESSURE
Blood pressure levels vary with age and sex. A rule of thumb for estimating the normal systolic pressure in a male is to add 100 to the age of the patient, up to the level of 100 mm Hg.
John Fischer, volunteer fireman, Joliet, Montana
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
3.5
out of
10
based on
20
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942
Gardening
PLANTING TOMATOES
When Lilies of the Valley bloom, plant tomatoes outside.
Vivian Brubaker, Bettendorf, Iowa
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
5.2
out of
10
based on
17
reviews
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943
Temperature
ESTIMATING A COUNTRY'S GNP
A change of 1 degree C in the average annual temperature will result in a 2 percent change in the country's GNP.
Thomas W. Neumann, anthropological archaeologist, wildlife ecologist, and field crew crisis manager
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
4.3
out of
10
based on
17
reviews
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944
Climbing
CHECKING A ROPE
Get a new rope when 50 percent of the surface strands are worn to fuzz.
Peggy Kerber, editor, Mountaineering
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
5.4
out of
10
based on
17
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945
Driving
PARALLEL PARKING
To parallel park, start beside the car in front of the space. Back into the space in a tight arc until the headlights of the car behind disappear from your rearview mirror.
Norman Brenner, Fleetwood, New York
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
5.2
out of
10
based on
17
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946
Conversations
SPOTTING A TROUBLEMAKER
Beware those who preface a suggestion with, "I don't see why you can't..."
Leonard Morgenstern, pathologist, Moraga, California
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
5.2
out of
10
based on
19
reviews
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947
Animals
INSPECTING A DEAD DEER
Check the bone marrow of a deer's thighbone. If it resembles red or yellow jelly, the deer starved to death. If the marrow is solid fat flecked with a little red, or even red but still solid, the deer was well fed.
Paul Kelsey, biologist
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
5.9
out of
10
based on
17
reviews
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948
Building
VENTILATING YOUR ATTIC
You need 1 square foot of attic vent for every 150 square feet of attic ceiling area.
Rick Eckstrom, plan review officer, Ithaca, New York
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
5.3
out of
10
based on
16
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949
Computers
WRITING A COMPUTER PROGRAM
In most computer programs, 10 percent of the program accounts for 90 percent of the processing time. Finding and rewriting this part of the program so that it runs fast is always cost effective.
Phil A. Schrodt, Associate Professor, Northwestern University, Evanston, Illinois
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
6.1
out of
10
based on
26
reviews
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950
Magazines
GETTING QUOTES ON A PRINTING JOB
If a job is more than 10 percent of the year's printing budget, get six quotes. Smaller jobs, get three.
Camilla Walter, Hood River, Oregon
(LR)
Legacy Rule of Thumb from previously published collections
Current Rating:
5.0
out of
10
based on
14
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