re: "How does one "use up" the bubbles?"
If you hold a level vertical for too long, the bubbles used for
leveling go up into the wood never to be seen again.
If you hold it horizontal for too long, the bubbles used to check for
plumb go away.
It's best to store your levels at a 45 degree angle for maximum bubble
BTW...They last a little longer in aluminum and plastic levels because
the material is denser.
(Eventually I'll start adding smiley faces to these posts.)
DerbyDad is the king of obtuse humor, as in "Metal Yard Shed" somehow
meaning a shed for a metal yard. Now the Thermos joke *was* really funny
but my feeling is that if you have to explain a joke to more than one
person, you should drop it from your stand-up comedy act. No offense Derby,
but obtuse humor often creates ill will when it's misinterpreted. The first
exchange we had way back when was a case in point. You were making a joke
and I thought you were being insulting.
Your basic premise is wrong to begin with. Levels do not work 'based
on the ground, earth's positon, etc." It works on gravity which is
permanently fixed to the center of mass of whatever planet, star,
moon, etc. you are on.
Try again but get an education first.
You're correct. His basic premise is VERY wrong. The solar system is
definitely NOT level:
Scroll down to inclination where it shows how far off the planets are from
ecliptic and from the equator of the sun. Of the eight planets, the orbital
plane of Mercury has the greatest difference from Earth's at 7° orbital
inclination. Pluto was the previous record-holder until it was deposed as a
planet during a recent coup. (-:
The OP should appreciate having a level floor when he next loses his
marbles - that way they'll stay in the pretty much the same place.
You're right about gravity. It's a pretty good basis for determing levels.
What amazes me is that even though the Greeks clearly knew about levels and
how to use them, they built "to eye" in the sense that "level and square"
often don't look proportionally correct because of perspective effects.
To counter that effect the Greek builders created optical illusions to make
the buildings appear perfect. If steps are built perfectly flat or
horizontal, they will seem to sag in the middle. Every horizontal line in
Grecian temples therefore curves slightly upwards. If columns are built
straight up and down, they will appear to lean outwards. The ancient Greeks
built vertical lines to lean towards the middle.
They were quite familar with plumb bobs, ancient ones have been discovered
in the rubble of temples that collapsed from earthquakes during
construction. They used them, however, to deliberately and precisely build
"out of plumb" so that it would look perfectly rectangular from a distance.
Quite an idea using levels to deliberately build out of plumb buildings that
looked perfect but were far from it, anglewise.
How futile a battle is that? (-: This is like a troll-based food court at
a huge shopping mall. At least this is a repair related troll and not a
Farsi travel ad. Most of the others involve bodily functions, politics and
really bad humor. I've set my "mark as read" time for just long enough to
insure I read each message long enough to be sure that it's a trolling and
Doesn't hurt to remind people, I guess.
I score it 3 out of 10.
On this board you might even get a few on your side.
As to using sight vs. a level, you're using the level wrong.
You can do pretty well by sight, but a level should increase
For a fun experiment for the gullible, put your level on
a flat surface and come back in an hour and watch that bubble
move all over the place.
Now sober up and try again.
From that site:
"This gives the bricklayer a perfect, taut, vertical string to
guarantee that the wall of bricks will be all the same distance from
the string and hence be vertically straight."
Actually, this gives the bricklayer a perfect, taut, vertical string
to use as a reference when laying his brick. The string itself will
not "guarantee" anything. The distance and straightness is based on
the skill of the mason.
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