In which century were Nansen bottles created?

Nansen bottles, which are used for collecting water samples from various depths in the ocean, were developed in the 19th century. This innovation is attributed to Fridtjof Nansen, a Norwegian explorer and oceanographer, who designed the bottle in the 1890s during his Arctic expeditions. The Nansen bottle was significant in advancing oceanographic research by allowing for the collection of water at different temperatures and depths without contamination, thereby enhancing scientists' ability to study oceanic conditions.

The 19th century was a period marked by significant advancements in science and technology, with many instruments and techniques being refined for exploration and experimentation in various fields, including oceanography. Understanding this context helps to illustrate why the Nansen bottle is recognized as a product of that particular century.