Aristotle's metaphysics contains observations on the nature of numbers but he made no original contributions to mathematics.

His writing and photographs contained observations of the bird and insect flight.

It also contains reflections and observations made by participants in different Musalaha events.

Volumes 1-5 contain observations on natural history around Europe.

The report contained several observations made by official agencies on the criminal network which was virtually running a parallel government.

The album contained bleak and acerbic observations of Australian life.

Some of the texts containing astronomical observations are extremely obscure.

It contains trends, relationships, categories, and personal observations that its owner perceives but which no one else may agree with.

Time-series data sets contain observations over time; for example, inflation over the course of several years.

I feel, however, the question itself contained observations of quite a different kind.