ObamaBinLaden

With fuming acids i mean fuming acids,not fumes from a reaction or boiling it.The fumes that are produced by oleum for example,or HNO3 above 90%.

Are fuming acids safe to handle without a gas mask? Are glass stoppers good for fuming acids?

I've seen some...let's say "tutorials" about HNO3 vacuum distillation.The best one i think is the one from UncleFester's book. Now...i can't really find anything complete about the vacuum apparatus.I've seen how to "install" the glassware and i understand that but i couldn't find anything about the vacuum source and water source.How to install them?Can someone give me a "picture" or something please?UncleFester(it's just a nickname) said in his book that his method will give very concentrated HNO3.Since that book is about explosive and he is not stupid the acid should be pretty pure and good for anything else,not just explosives.

And that's what i don't understand.Add x grams in 1/2 portions or add 1/2 grams?It doesn't say any amount of x substance,just that.

So...i came across this: .To this solution add *x-substance* in ½ gram amounts. I've never seen something like that before.Maybe it's not being used in my country...So,what's that"1/2 gram amounts"?How do i calculate that?