observational

When a scientific truth arises, it is so because of observational and experimental consensus.
The Curious Passions of Mr. Cosmos: Neil deGrasse Tyson On Space, Climate, and Why Curiosity Wins Every Time|Scott Bixby|June 8, 2014|DAILY BEAST
Meanwhile, some of the observational studies don't even show any benefit from insurance.
Study: Giving People Government Health Insurance May Not Make them Any Healthier|Megan McArdle|May 1, 2013|DAILY BEAST
In both stories, the detached, observational voice calmly belies the impossibility of ever keeping a job ‘strictly business.’
Great Weekend Reads|The Daily Beast|July 3, 2011|DAILY BEAST
All the lurking about unnoticed has allowed her to sharpen her observational skills.
10 Smart YA Reads|Shannon Donnelly|September 16, 2010|DAILY BEAST

Observational astronomy, meanwhile, was advancing to Descriptive and practical astronomy.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7|Various
He was hardly a practical astronomer in the observational sense.
Kepler|Walter W. Bryant
Even so with truth in observational science: it is built up of trifles patiently gathered together.
The Life of the Spider|J. Henri Fabre
For the most part it has been an observational rather than an experimental study.
Mimicry in Butterflies|Reginald Crundall Punnett
This first and oldest branch is known as "observational," or "practical astronomy."
A Popular History of Astronomy During the Nineteenth Century|Agnes M. (Agnes Mary) Clerke

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