The very rare barium zeolite edingtonite was described by W. Haidinger (1825), and named in honour of Mr. Ed.ington. Haidinger's material consisted of small crystals on thomsonite from Dumbartonshire. An analysis by E. Turner indicated a calcium aluminosilicate, but there was a loss of 11·22 %. The crystals (sp. gr. 2·71) were morphologically tetragonal, with the prism m(ll0) and sphenoids p(111) and n, and an axial ratio c/a = 0·6725. A. Breithaupt (1832) gave the name 'Antiëdrit' on account of this Symmetry,

Almost any scientific periodical devoted to mineralogy will afford examples of the failure on the part of some workers to realize the limitations of the accuracy of their measurements. Often results are calculated to far more places of decimals than the measurements can possibly warrant. In other instances measurements which show differences quite outside the limits of probable error are regarded as being in good agreement; this last failing applies especially to chemical analyses, which occasionally provide decided evidence against the formula they are supposed to support.

An occurrence of silica-glass in lumps up to 10 lb. in weight, smaller fragments being scattered over an area at least 80 by 25 kilometres, has been discovered in the course of the work of the Egyptian Desert Surveys. A Survey expedition under Mr. P. A. Clayton was sent out in December 1932 to work in the unexplored area of the Sand Sea and Gill Kebir, west of Major R. A. Bagnold's 1930 route, and found the glass on December 29, 1932.

The end of October 1932 information was received at the West Siberian Museum in Omsk that in May 1932 a meteorite fell in the village of Kuznctzovo (Кузнецово), 140 km. east by north from Omsk. On November 3-7, together with my assistant P. Serov, I investigated the matter on the spot. In March 1933 some further information was received, and I am now able to make the following preliminary communication.

In describing the chief assemblages of the Scawt Hill contact-zone in Co. Antrim brief reference was made to the occurrence of wollastonite and xonotlite associated with the flint nodules of the contact-altered chalk. A more detailed examination of these nodules has now been made and the study of a large number of examples has revealed an interesting group of mineral assemblages which have developed by a progressive metasomatism of these siliceous bodies.