Originally Posted by DieselJim

measuring in kgs or slugs would be better. Lbs is kind of a clumsy measurement for mass. It is unfortunate that weight and fluid measures both use onces in the english system. If you notice it says nt wt on the bottle instead of fl ozs. I don't remember if this is so I would suspect an fl oz of distilled water weights 1 oz. If so the system is even more screwed up think I think. If you struggle with mass concepts be sure to study extra hard before taking up this job. It is hard to keep straight.