try works, n. — Green’s Dictionary of Slang

try works n.

[whaling j. try works, large pots in which whale blubber was boiled to extract oil]

(US) the vagina.

1860

N.E. Police Gaz. (Boston, MA) 18 Aug. 8/1: Old Nealon and Susan Pinkham were seen ‘billing and cooing’ [...] Perhaps the old fellow wanted to buy those ‘try works’ of hers to boil his lobsters in (!).