Letter | Published:



THE Astronomer Royal desires me to mention, in regard to Mr. W. H. Preece's communication (p. 289) describing an unusually sudden appearance of earth-currents between 10h. and 11h. p.m. on January 19, that our magnetic and earth-current registers both show, throughout the night of January 19, more or less of unusual disturbance, never however very considerable. The greatest deviation occurred in a sudden wave at 10h. 15m., as Mr. Preece describes. From 10h. 50m. until midnight there was general quiet, and the disturbance afterwards was not great.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Author information

Rights and permissions

Reprints and Permissions

About this article


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.