Friday July 12th - Tried one hit of some white blotter of which I bought eight hits (as I recall) that was pre-cut into small squares.
From that single hit I got a decent medium-dose effect. I expect that it must have been around 100 micrograms or maybe even 120ug.
The next night (July 13th), not understanding the tolerance effect, I took two hits, (as well as giving two to my girlfriend), I barely felt anything at all, and even smoking some weed gave very little noticeable effect besides a bit of a stimulant effect.
The benefit of this was that I was able to babysit everyone else.
I believe that it was this same batch of LSD, (which I took three hits of), that induced my first "bad trip".