Rosin from the bow.

- Rosining the bow. - Rosining the bow. That's right.

That rosin will fluoresce under ultraviolet light.

It's rosin. Dancers put it on their shoes. I knew that.

Gotta put rosin on your bow. It's just like feeding a parakeet.

A bow needs rosin just like a police car needs prisoners.

Gotta put rosin on your bow. It's just like feeding a parakeet.

A bow needs rosin just like a police car needs prisoners.

Because of the calluses on her fingertips and the faint scent of rosin on her dress.

Yes, the hands and forearms in particular, Jethro, all caked with a mixture of rosin, polycarbon dust and machinery grease.