Copy 2

An introduction to electricity. In six sections ... : illustrated with copper plates / by James Ferguson.

  • Ferguson, James, 1710-1776.
Date:
1770
Catalogue details

Licence: Public Domain Mark

Credit: An introduction to electricity. In six sections ... : illustrated with copper plates / by James Ferguson. Source: Wellcome Collection.

    150/156 (page 142)
    In London, any number of perfons, not lefs than twenty-five, who will fubfcribe one guinea each, may have a courfe of twelve ledtures read on the above-mentioned apparatus, provided they agree to have at leafl three ledtures a week : in which they may appoint the days and hours that are molt convenient for themfelves Sundays excepted. Within ten miles of London, any number of perfons, not lefs than thirty, may have a courfe each fubfcriber paying a guinea, and agreeing to have fix lectures a week. And, # . ' r< 4 v Within an hundred miles of London, any number of fubfcribers, not lefs than fixty, may have a courfe, each paying as above, and agree¬ ing to have fix lectures a week.——Greater dif. tances require a greater number of fubfcribers*