This discourse on William Gilbert and terrestrial magnetism in the time of Queen Elizabeth was delivered by Silvanus P. Thompson at the meeting of the Royal Geographical Society on March twenty-third MDCCCCIII on the occasion of the tercentenary of the death of Queen Elizabeth, and is now printed by Charles Whittingham and Company at the Chiswick Press. [Illustration] Transcriber's note: The original book used the long "s", which has been changed to the modern "s" here. Other archaic spellings have not been changed. The illustrations are small decorations. End of the Project Gutenberg EBook of William Gilbert, and Terrestial Magnetism in the Time of Queen Elizabeth, by Silvanus P. Thompson