Neodymium! Thanks!

I have a few thoughts.

For plaster, try a magnetic stud finder instead of an electronic one. With any luck (and luck you will need) your lath is wooden and the magnet will stock on the nails. You need a high powered neodymium magnet, not just a fridge magnet for this. If your magnet sticks everywhere, your lath is made of ferrous metal, and you'll have to use a drill. Stick with a small bit, of course.

Joists aren't 16 to 24 inches apart. They're 16 or 24 inches apart, on center. That was the case even 100 years ago. In some cases, 19.2" is the standard joist spacing. Check those three distances from your first hole.

Your joists could be running the opposite direction of what you'd expect. They normally span the narrowest dimension of the house, but some run the longest length of the house. Try those three distances over the other axis, too.

At that age, there is a good chance that your ceiling joists are nailed to studs. If you can find the studs on opposing walls, the joists should run end to end on the outside of the studs.

Good luck!

I remember 5.25" floppy disks, son. I played Robot Odyssey on a Tandy something or other and I need my heating pad!

Jesus, I'm old.

Alphonso is the most common cultivated mango variety (a cultivar) and is the best kind we can find in most of the U.S. Adolfo mangos are better in my opinion.

Saved!

Well, that looks perfectly done. You got a recipe? What's your secret?

Nah. We also eat more on average. The fossil fuel impact of transporting that extra food is more than enough to offset a slightly higher use of biodegradable paper pulp.

Came in to say the same.

Those eyelashes are creeping me out...