- How did you know there were two ounces in a drink?
- I'm a nurse. I always watch people when they pour something. I watched Ti-Joseph, and it was exactly two ounces.

— Betsy Connell (Frances Dee)

9 seconds sound clip from the I Walked with a Zombie movie soundboard.

You can hear this line at 00:20:18.836 in the Blu-ray version of the movie.

Quote context

[...]

- Don't you have to work?

- By a curious coincidence, it's my day off, too.

- Some talk of Alexander and some of Hercules, of Hector and Lysander and such great names as these. But of all the world's great heroes, there's none that...

- Ti-Joseph, better bring me another. I have to keep the lady entertained.

- Must be hard work entertaining me if it requires six ounces of rum.

- Six ounces?

- Higher mathematics.

- Two ounces to a drink. Three drinks, six ounces.

- How did you know there were two ounces in a drink?

- I'm a nurse. I always watch people when they pour something. I watched Ti-Joseph, and it was exactly two ounces.

- There was a family that lived on the isle of Saint Sebastian a long, long while. The head of the family was a Holland man, and the younger brother, his name was Rand. Ah, woe...

- Listen, did I ever tell you the story about the little mule on the plantation?

- Wait a minute, I want to listen.

- The Holland man, he kept in a tower a wife as pretty as a big, white flower.

[...]