研究所

研 = 开 + 石 : Maud Younger is lacking salt for her ... . Luckily, there's a salt stone just inside the anthill's kitchen, so she uses a bottle opener to grind off some salt.

究 = 九 + 穴 : Joan of Arc (ji) is carefully studying (究) cave paintings (穴) that have appeared over night in front of the outhouse (ou1) using mass spectrometry. She carves off a little of the paintings and puts them in the mass spectrometer. As it emits a huge cloud nine (九), the spectrometer shows on the display that the main component is love.

所 = 戶 + 斤 : Susan Saint Bernard and her whole family are weight lifting in the place of the observatory. They are all together lifting one barbell.