Table of contents

It is believed that the stones at Stonehenge were arranged as a system for storing information on recurrent solar system events. Various extraneural memory or data stores are reviewed from the book and telephone exchanges to computer memories. Magnetic memories, semiconductor memories and optical storage are discussed

The claim that the Vikings discovered North America first has never been verified. But the discovery of a time worn map depicting an island called Vinland, to the west of Greenland, seemed to prove that Lief Ericsson had visited the United States some 50 years before Columbus' celebrated voyage.

The spinels are one of the most extensive series of related chemical compounds known. The mineral spinel Mg²⁺Al₂³⁺O₄^2- can be modified by substitution by a wide range of divalent and trivalent cations to replace Mg²⁺ and Al₂³⁺ respectively. The spinel crystal structure is physically flexible which leads to a wide range of physical properties and therefore practical applications. Spinel ferrites are extensively used in the field of electronics and increasingly for miniaturisation

Glass fibre reinforced cement (GRC) has many potential applications. It combines lightness with considerable strength and formability and is even being considered as a replacement for timber. The basic principles, fabrication methods and applications of GRC are discussed

Report on Multivariable technological system, 16-19 September 1974 at the University of Manchester.

Report on High speed photography, 16-20 September 1974 at Imperial College, London.

Report on Electrostatics, 18-19 September 1974, at the University of Liverpool.

Report on International symposium on GaAs and related compounds, 24-26 September 1974 at Deauville, France.