@engineer,
Skipper: Oh, never mind, Professor, I'll test her myself! Now Ginger, start reading.
Ginger: Um, 36. 22. (pauses and looks at Skipper) 36? (does naughty fingers)
Skipper: Well, Ginger, I was trying to figure out the longitude and latitude of,....this island.
Gilligan: Oh no you weren't, Skipper, you were thinking about Gin-
Skipper: Never mind, Gilligan! You try, Professor.
Professor: All right, Ginger, read my mind.
Ginger: 36, 22, 36.
Professor: Well, that's just the atomic weight of sodium hydro-chloride.