Mostly c, but sometimes g
B and/or C (Cr2O3)
Usually F, sometimes B, E on occasion (sheath from the borosilicate rod).
All men dream, but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find that it was vanity; but the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible. - Lawrence
If you reach the age of 60 without becoming a curmudgeon, you haven't been paying attention.
C and G (felt) but I bought some balsa last week and I am going to load it up with chromium oxide and try that too.
There is a cult of ignorance in the United States...nurtured by the false notion that democracy means that “my ignorance is just as good as your knowledge.” -- Isaac Asimov