Om Materialprøvningens Udvikling i Norden
Og om Statsprøveanstaltens Virksomhed

114 sting-machine« had been raised in 1761 in Copenhagen at »Gammelstrand« opposite to »Naboløs«. It consisted of post of thirty feet from which the anchors by their own weight should fall down on an underlying cannon without being da- maged. To the test and the following stamping which of course did not pass without expenses the anchor-smiths opposed very much. They directly refused to part with their anchors if they had to be stamped or continued selling unstamped anchors. In 1764 Christen Jochumsen Lund, an anchor-smith, was fined 1,000 Rdlr. (more than 100 £) for this trespass (he was howe- ver spared from paying more than 100 Rdlr.); and on that occa- sion it was found out that even the Asiatic Company never had its anchors tested nor stamped. To obtain a total view of what Denmark has contributed to the development of the testing of materials, I adressed myself to the Engineer Corps, to the State Railways, to the director of the Technical Service of the Artillery, to the Royal Navy-Yard and to the Government’s Technical Office for Testing of Paper and asked these institutions to assist the States Testing Laboratory with informations. Thanking these institutions for their readiness 1 render the received informations and some other informations especially about the Danish States Testing Laboratory. a. Account of Experiments made by the Engineer Corps during the years 1858—1880 on Portland-cement and Concrete1). When at the beginning of the last century the engineers be- gan using brick-constructions for the sea-forts at Copenhagen the officers of the Royal Engineers who directed the work had to make experiments before deciding how the mortar, exposed to the violating influence of the sea, should be composed in the most appropriate way. From the year 1845 they commenced complete series of experiments on various sorts of hydraulic mortar. These experiments were made by making test-pieces of different proportions which after their setting were put out into the sea where they were under observation for a series of years. When the engineer corps in 1854 entrusted Mr. J. F. M. Ernst, at that time a captain (born in Copenhagen 1820, dead *) By L. Madsen, captain of the Royal Engineers.