The instrument affords a ready method of transferring liquids.
In liquids sound waves are longitudinal as they are in air.
Pasteur first formulated the idea that bacteria are responsible for the diseases of fermented liquids; the corollary of this was a demand for pure yeast.
The system of multiples was for liquids --
With the DNA you could tell whose finger it was, if you happened to have the rest of the guy's body or a few squirts of his liquids.