Wardian case

The Wardian case was an early type of sealed protective container for plants, an early version of the terrarium. It found great use in the 19th century in protecting foreign plants imported to Europe from overseas, the great majority of which had previously died from exposure during long sea journeys, frustrating the many scientific and amateur botanists of the time. The Wardian case was the direct forerunner of the modern terrarium, Vivarium (and the inspiration for the glass aquarium), and was invented by Dr. Nathaniel Bagshaw Ward (1791–1868), of London, in about 1829 after an accidental discovery inspired him. He published a book titled On the Growth of Plants in Closely Glazed Cases in 1842.

Dr. Ward was a physician with a passion for botany. His personally collected herbarium amounted to 25,000 specimens. The ferns in his London garden in Wellclose Square, however, were being poisoned by London's air pollution, which consisted heavily of coal smoke and sulphuric acid.

Dr. Ward also kept cocoons of moths and the like in sealed glass bottles, and in one, he found that a fern spore and a species of grass had germinated and were growing in a bit of soil. Interested but not yet seeing the opportunities, he left the seal intact for about four years, noting that the grass actually bloomed once. After that time however, the seal had rusted, and the plants soon died from the bad air. Understanding the possibilities, he had a carpenter build him a closely fitted glazed wooden case and found that ferns grown in it thrived.

Dr. Ward published his experiment and followed it up with a book in 1842, On the Growth of Plants in Closely Glazed Cases.

English botanists and commercial nurserymen had been passionately prospecting the world for new plants since the end of the 16th century, but these had to travel as seeds or corms, or as dry rhizomes and roots, as salty air, lack of light, lack of fresh water and lack of sufficient care often destroyed all or almost all plants even in large shipments. With the new Wardian cases, tender young plants could be set on deck to benefit from daylight and the condensed moisture within the case that kept them watered, but protected from salt spray. The first test of the glazed cases was made in July 1833, when Dr. Ward shipped two specially constructed glazed cases filled with British ferns and grasses all the way to Sydney, Australia, a voyage of several months that found the protected plants still in good condition upon arrival. Somewhat more interesting plants made the return trip: a number of Australian native species that had never survived the transportation previously. The plants arrived in good shape, after a stormy voyage around Cape Horn.

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