Johannes Burman

Johannes Burman (26 April 1707 in Amsterdam – 20 February 1780), was a Dutch botanist and physician. Burman specialized in plants from Ceylon, Amboina and Cape Colony. The name Pelargonium was introduced by Johannes Burman.

Johannes Burman was the eldest son of the theologian Frans Burman (1671-1719) and his wife Elizabeth Thierens. His brother was the theologian Frans Burman (1708-1793). He started his studies in Leiden in 1722 under Herman Boerhaave, and qualified in 1728 as a doctor of medicine, after which he practiced in Amsterdam. After the death of Frederik Ruysch he was appointed Professor of Botany in Amsterdam. Johannes Burman was married to Adriana van Buuren. Their son Nicolaas Laurens Burman was also a botanist and studied under Linné in Uppsala.

Carl Linnaeus, in 1735 on a trip through Holland, was invited by Burman, carrying a letter of recommendation from Herman Boerhaave. Burman was impressed by the young man and offered him accommodation in his home on Keizersgracht. Linnaeus was employed by Burman almost six weeks to complete a flora of the plants of Ceylon.

Berm

A berm is a level space, shelf, or raised barrier separating two areas. It can serve as a border barrier. The word berm originates in the Middle Dutch and German berme and came into usage in English via French.

Military use

History

In medieval military engineering, a berm (or berme) was a level space between a parapet or defensive wall and an adjacent steep-walled ditch or moat. It was intended to reduce soil pressure on the walls of the excavated part to prevent its collapse. It also meant that debris dislodged from fortifications would not fall into (and fill) a ditch or moat.

In the trench warfare of World War I, the name was applied to a similar feature at the lip of a trench, which served mainly as an elbow-rest for riflemen.

Modern usage

In modern military engineering, berm has come to mean the earthen or sod wall or parapet itself. The term especially refers to a low earthen wall adjacent to a ditch. The digging of the ditch (often by a bulldozer or military engineering vehicle) can provide the soil from which the berm is constructed. Walls constructed in this manner are an effective obstacle to vehicles, including most armoured fighting vehicles, but are easily crossed by infantry. Because of the ease of construction, such walls can be made hundreds or thousands of kilometres long.