"David Nebenzahl" wrote

But forget the glue: hardware alone will secure the sistered post to the
original one. Glue won't do any good. Either through-bolts as you describe
(bolt/nut/washer), or use a lag screw, which is what I think you're
describing: basically a big wood screw with a thick shank and a hex head
for using a wrench.

Perhaps he meant the glue to just hold the post up in place until he added
the through-bolts?