Pounds abreviation

Alright, I asked a question regarding biking but this is more of a weight loss question. Currently I weigh about 195 lbs at 6' (5' - 11.5"). I started at about 205 and have a target weight of 175 (-185) either is a step in the right direction. But I am trying to figure out how long it will...

What is 10 stone in pounds?

I've been trying to gain about 15 pounds for a couple of months but I'm stuck at 115. I'm 5'6 and I would love to gain a little weight. No matter how much I eat I can't gain any weight. Any suggestions?

If your on a liquid diet how many pounds will you loose I heard that you can loose up to 17 pounds in a week is that true! My friend tried it and she lost 17 pounds!

Simple question, really. I'm not sure if I'm putting this on the right board, but I figured an engineer or two would probably know the answer. The common english abbreviation for a pound is "lb", is there any specific reason or meaning to why L and B where chosen to abreviate this word? ...