whats a lid?

I remeber reading some exert from a book online that said the THC level in pot back in the 60's was around 2-3% and know we have people in B.C. pulling off levels of 25%. (more then 10x more THC)

Lots of studies (usually government funded) claim to have found similar results. The truth is, potency has gone up noticeably because of selective breeding and improved growing techniques but it's not quite that extreme. When they do these studies they usually test weed that has been kept as evidence since the 60s, and during the past 40 years the THC has degraded and it appears to be less potent than it originally was. And it all depends on where your samples are coming from. Back in the 60s, just like today, there was a wide range of potencies in circulation.

a lid is a 3 dollar bag. also known as tre bags.

and where and when i come from a lid was a 3 finger, appx 3/4 oz bag and usually cost 15 bucks. an oz was 20 and this was the standard measurement for brick weed (the red and green celophane wrapper stuff). the high quality stuff went for as much as 50 bucks/oz and would be from columbia, southern mexico, jamaica, etc...then there was the exotic stuff like nam, cambodian and thai sticks that would take a paycheck to get...or sticks could be had for 20/stick (about 1/4oz).