From: chuckies@cs.mcgill.ca (Charles J. Savoie)
Newsgroups: alt.drugs
Subject: Re: Gravity Bong!
Date: 20 Nov 92 04:03:52 GMT
Organization: SOCS - Mcgill University, Montreal, Canada

In article <Af1gY_q00Vo90z92gW@andrew.cmu.edu> Kevin Paul Goldman <kg1i+@andrew.cmu.edu> writes:
>
>I saw eons ago a set of instructions on how to make a good gravity bong
>posted on this bboard. If anyone has it, or a good clue it would be
>appreciated if you could take the time to send me a copy/post the
>information.
>
>thanx
>
>Mongo


Here goes (knew this stuff would come in handy sometime... even if I never
build the damn thing):

-------------------I DID NOT WRITE THE FOLLOWING------------------

Article 17378 of alt.drugs:
From: app45293@uxa.cso.uiuc.edu (ZUSS)
Subject: gravity bong
Date: 11 May 92 21:56:52 GMT
Organization: University of Illinois at Urbana

  I'm reposting this for the benefit of anyone who might
  have missed it the first time.  
-----------------


          bowl
      ||          water tube             uncapped two liter bottle
    |----|  _____________________
     ||||  / ___________________ \  |  |                   
    / || \/ /                   \ \/    \                   
   /  || / /                     \ \     \         
  /   || ||\                     /\ \     \               
  |   || || |                   |  ||      |            
  |___||_||_|                   |  ||      |
  |   || || |                   |  ||      |
  |   || || | bong bottle       |  ||      |
  |   || || |                   |  ||      |
  |      || |                   |__||______|
  | H20     |                   |     H20  |
  \________ /                    \________/
   

 This marvelous picture is gonna need some explanation.  We have two two-liter
plastic bottles.  You can use larger bottles if you wish but you will save
yourself trouble by making them the same size.

  A cap that fits the bong bottle will have the bowl attatched to it in an
airtight manner.  The best way is probably to have a threaded bowl and make
a snug (it takes care to make the hole snug) hole in the cap.  A tube is fixed
to the bowl/cap, also airtight.  The depth to which you allow this bowl tube
to go is up to you.  If you make it short, probably not all the smoke will
pass through water.  It you make it long, your construction methods will have
to be pretty good because it takes a greater pressure differential to 'pull'
the smoke to that depth.  If the pressure gets low enough, flaws in your 
airtight sealing will make a big problem.

  The water tube must be flexible (probably polyvinyl, get it at your pet
store)  and needs to be about four feet long.  It will enter through holes
near the top of each bottle.  These holes MUST BE AIRTIGHT.  Each end of the
tube must go to the same depth in each bottle.  The deeper you run the ends
of the tube, the larger your smoke chamber will be.    {water tube should be
about 1/2 inch diameter, BTW}

   Now she's ready to run.  Fill the bong bottle with water, almost to the 
top.  Fill the water bottle only to the exact level of the tip of the tube.
BUT BE CAREFUL--this is why they call it the gravity bong.  The water tube is
a siphon.  Before you start, the water bottle must be higher in altitude than
the bong bottle.
  
   Pack a hit of your -er- special funny tobacco in the bowl.  Have lighter
in hand and ready.  NOW, lower the water bottle below the bong bottle.  Through
the magic of gravity, the water will flow out of the bong bottle and into the
water bottle.  In the bong, an expanding smoke chamber is 'sucking' air through
the bowl tube to replace the lost water.  Be applying the flame as soon as the
water is flowing, so that the air will be rich with the smoke.

    If when you lower the water bottle there is not immediate flow, have a
friend suck on the mouth of the water bottle to start it off.  Once it is 
going it will not stop, since we are using the famous siphon which steals
gasoline and empties my brother's aquarium.  You can adjust the rate of flow
by decreasing the height difference between bottles.  If, however, you raise
the water bottle above the smoke bottle, the flow will reverse and this will
make you severely unhappy.  When the water level in the smoke bottle gets to
the level of the end of the water tube, there will be a !SLURP! and the process
will halt itself.  KEEP THE BONG HIGHER THAN THE WATER.

    You should now have a bong filled with concentrated and mostly cooled 
smoke.  Remove the cap/bowl/bowl tube.  The bowl tube must be connected to
the bowl and not the bong chamber or you are going to be inhaling water in
the next step.  Place your hand over the top of the uncapped smoke bottle so
that the smoke will not escape.  
 
    It's especially good to have a friend help you with the next step, unless
you happen to be a real pro at using this contraption.  When your courage is
up, wrap your lips tightly around the hole in the bong bottle.  Have friend
slowly raise the water bottle above the level of the bong.  Friend had damn
well better not raise the water bottle too high, letting the water flow too
quickly.  Once again, the siphon might not work immediately, so a short suck
on the bong might get it started.  When the water does flow, the smoke chamber
will shrink and the smoke will be forced out.  In other words, marij--er--
special funny tobacco is being PUMPED INTO YOUR LUNGS.  Is this behavior
befitting of idiots?  HELL YES!  Nonetheless, I have done it myself.  It
is probably best to inhale lightly while the smoke goes in.  Don't resist
the inflow or you make big waste.

    It is very unlikely that you'll be able to take in an entire 2 liter
of the world's thickest smoke in one hit.  Signal your friend that you
need oxygen, swap your mouth for your hand over the bong opening, and try
to bring the bottles together at a level where the water levels in each are
at the same height.  Now your friend can take his turn.

    I hope I was able to explain this adequately.  If you actually want to
make one yourself, I highly recommend performing trials with -um- cheaper
non-funny tobacco.  When I made one myself I found that you've got to get
the hang of it before it goes smoothly.  I never got very fond of it simply
because there's lots of steps involved and plenty of room for screwing it
up.  After one hit off that baby you aren't going to be in the best shape
to operate it again--well, I wasn't.  The maniac from which I learned this
insisted that it's the 'most efficient way to do doobie.'  He was in the 
habit of sucking down about 4 g-bong hits in a row.  He is also proof that
with LOTS of practice one can fill the g-bong with smoke so thick you can
walk on it and administer it to oneself.

*DISCLAIMER*  This posting is for informational purposes only.  I do not
              endorse any illegal activity.  That means all you kids who
              are less than 18 years old had better perish the thought of
              making one of these.


--------------END OF ORIGINAL ARTICLE---------------

-Chuckies

-- 

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|   |--| |  | |   |<   |  |-  `-.   Charles Savoie  chuckies@cs.mcgill.ca
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