there was a time when 1 inch was the 'rule of thumb' probably 25mm now
A useful principle but not intended to be reliable in every situation. Meaning the situation applies to everything because long ago the rule of thumb meant 1 inch equals your top of your thumb, so thats the rule of thumb. Over the years it has taken a more figurative meaning.
No. Rule of thumb for females: 100 lbs. for first 5 ft. + 5 lbs. for each inch over. Rule of thumb for males: 106 lbs. for first 5 ft. + 6 lbs. for each inch over. If you are a 5'4" female, you should be 120 lbs. If you are a 5'4" male, you should be 130 lbs.
the rule of thumb is usually one inch of fish per gallon
The rule of thumb for stocking levels in a freshwater aquarium is 1 inch of fish per gallon of aquarium. For instance, five 1" guppies in a 5 gallon tank, or ten 3 inch cichlids in a 30 gallon aquarium.
For an aerial shell, rule of thumb is about 50-80 feet per shell inch.
The octet rule is a simple chemical rule of thumb that states that atoms tend to combine in such a way that they each have eight...
The rule of thumb is usually 1 inch of fish per gallon. You could have 1 10 inch fish or 10 1 inch fish
This is an urban legend. There was no such law. The phrase "rule of thumb" comes, rather, from the time-honored practice of using the thumb to make rough measurements (think "rule" as in "ruler"). In some languages, in fact, the word for "inch" is the same as the word for "thumb" (e.g., French pouce) or is derived from it (e.g. Spanish plugada, from pulgar).
The basic rule of thumb is "not more than an inch of fish to a gallon of water."
"Rule of Thumb" means a rule or principle that provides guidance to appropriate behavior.
The rule of thumb is not intended to be accurate or reliable for every given situation. When a person is doing something by the rule of thumb, they are taking an educated guess.