The author's excellent 'powers of observation' [=ability to notice and pay close attention to things] are evident in the book's detailed descriptions.
The plants seem to have recovered from the disease, but they are still 'under observation'. [=someone is watching them carefully]
They're keeping him at the hospital 'for observation' [=so that doctors can watch him carefully] for another few days.
(..) I assume that is why your government wanted you to observe me. What are you writing now? Oh, just an observation that Americans are hubristic, and Canadians must deal with this challenge in future cooperative ventures. Facts are not (..)2014 TvShow: Bones Title: The Master in the Slop Season: 9 Episode 14