Where can I find the record of the trial and other proceedings in the case of Palsgraf v Long Island Railroad Co., 248 NY 339 (1928)?

Answer

The trial of this famous case led to three appellate decisions, reported at 222 AD 166 (2d Dept 1927), 248 NY 339 (1928) (plenary decision; often deemed to have developed the modern doctrine of proximate cause), and 249 NY 511 (1928) (denying reargument). All three would have corresponding records and briefs, which may be found in at least the following places:

1) 248 NY 339: https://www.law.berkeley.edu/files/Palsgraf_Record.pdf (linked on Wikipedia page on the case);

2) any of the three: other places cited in Prosser article and Posner book (see above-linked Wikipedia page);

3) 222 AD 166: in bound volumes at New York State Archives in Albany;

4) 248 NY 339 and 249 NY 511: in one or another format at New York State Library in Albany; and

5) all three: in bound volumes at Fourth Department Library in Rochester.