"in the observation of" is a correct and usable phrase in written English.
You can use it when expressing an opinion based on personal experience or the experience or work of others. For example, "In the observation of many experts, global warming is a very real and pressing concern."
In the observation of foulant behaviors, it was observed that the humate was deposited and formed a loosely packed fouling layer on the anion-exchange membrane surfaces, thus having reversible fouling effects on the process.
The origin of every mark is always in the observation of nature.
And I think the way to perceive an artist is in the observation of their choices".
"I wonder if we've found something in the observation of men in those situations that is somehow more truthful".
An important application of resolving power is in the observation of visual binary stars.
The results are extremely funny in the account of a folie à deux in the dangerous world of teaching, and perceptive in the observation of the creative process.
Flash lamp, any of several devices that produce brief, intense emissions of light useful in photography and in the observation of objects in rapid motion.
The man's head is carved with such careful observation and such sensitivity in the observation of the subject's mood that it might almost pass for a Western sculpture of the 19th century.
This effect lasts all of about two seconds the time span suggested in the observation of the art historian Kenneth Clark that we can enjoy a purely aesthetic sensation for only as long as we can keenly savor the smell of a fresh-cut orange.
Recent developments in satellite technology have resulted in the improvements in the observation of ionospheric variability.
However, some outliers for individual measurements can be seen in the observation of all three pigs.
