The Széchenyi István Geophysical Observatory, also known as the Nagycenk Geophysical Observatory (NCK), is the only measurement site in Hungary where atmospheric electricity (AE) measurements have been made continuously since 1961. Quasi-continuous records of electrical potential gradient (PG) and Schumann resonances (SRs) from NCK are among the longest time series of their kind in Europe. This paper commemorates the efforts of people who established and managed AE measurements at NCK.

This article argues that the configuration of the Pontus Euxinus (the Black Sea), as described in Ptolemy's Geography, can be satisfactorily explained as a result of fitting contradictory pieces of information together that were inherited from earlier geographers, under the assumption that his sources were similar to those that have come down to us. The method is based on comparison of Ptolemy's data with the other ancient sources, revealing conspicuous similarities and differences between them.

The Liverpool Tidal Institute's (LTI) 100th anniversary was in 2019, and it acquired a reputation using tide prediction machines (TPMs). We describe the principles of a TPM, how many were made and Doodson's method to determine harmonic constants from tidal data to predict the tides. Although only three TPMs were used at the LTI, Doodson oversaw the design and manufacture of several others. We show how the UK, and Doodson particularly, played a central role in this area of science.

The ongoing sea level rise is a big concern in the context of present climatic change. The study of past sea level observations is of great importance in describing sea level variations. This work describes the rescue and analysis of a previously unrecognised 12-year record of sea level heights, measured at Trieste in the late 18th century. Besides having historical value, the data were found to be consistent, although undocumented technical issues limited the scientific conclusions.