J&B Firearm Sales
HighLine Firearms
Bear Creek Arsenal
Oregon Rifleworks
Sporting Systems
Southwest Firearms
JavaScript is disabled
Our website requires JavaScript to function properly. For a better experience, please enable JavaScript in your browser settings before proceeding.

  • Join the #1 community for gun owners of the Northwest

    We believe the 2nd Amendment is best defended through grass-roots organization, education, and advocacy centered around individual gun owners. It is our mission to encourage, organize, and support these efforts throughout Oregon, Washington, Idaho, Montana, and Wyoming.

    Free Membership Benefits

    • Fewer banner ads
    • Buy, sell, and trade in our classified section
    • Discuss firearms and all aspects of firearm ownership
    • Join others in organizing against anti-gun legislation
    • Find nearby gun shops, ranges, training, and other resources
    • Discover free outdoor shooting areas
    • Stay up to date on firearm-related events
    • Share photos and video with other members
    • ...and much more!

huffing and puffing

The huff and puff apparatus is used in school biology labs to demonstrate that carbon dioxide is a product of respiration. A pupil breathes in and out of the middle tube. The glass tubing is arranged in such a way that one flask bubbles as the pupils breathes in, the other as the pupil breathes out. A suitable carbon dioxide indicator, such as limewater or bicarbonate indicator shows the increased presence of carbon dioxide in the outgoing breath.This turns the bicarbonate into milky white substance.

View More On Wikipedia.org
Recent contents
  1. CountryGent

    Well now, that was interesting ....

    So, out of the blue, two junkies show up at our back porch. The Smurf yells "someone's here!," I grab a piece, and crack the back door and ask what is up. I instantly notice they are both high as a fing kite. They said something like "yah, um, your neighbor (also a worthless druggie idiot) saw...
Cerberus Training Group
Copeland Custom Gunworks
Tigard Pawn 4 More
Bear Creek Arsenal
Southwest Firearms Forum
Sporting Systems
Back Top