2W OF ELECTRICITY. CHAP. 7. ^. 



state of the atmosphere, as I have said above, 

 which are worthy attention, because they may 

 be principally concerned in producing many 

 disorders of health which are attributed to 

 atmospheric influence : when the weather is 

 settled, when only diurnal cumuli prevail with 

 Westerly Winds, then the action of De Luc's 

 column is the most regular ; and this is found 

 to be the most wholesome kind of weather.* 



Since the publication of the first edition of this 

 book, I have seen the superb columns made by 

 M. De Luc, himself. The varieties of the action 

 seem to correspond with my own observations 

 on the instrument belonging to M. Benjamin 

 M. Forster, of Walthamstow, which continued 

 ringing with varied action for a year, and which 

 received the whimsical appellation of the Per- 

 petual Motion, or the Jubilee Bells, because 

 they happened to begin to ring on the Anniver- 

 sary so called in honour of the 50th year of the 

 Reign of the late King. 



M. Benjamin M. Forster has lately discovered 

 another very curious fact, which shows the 

 connexion between Electricity, Galvanism, 

 and Magnetism, an instrument to demonstrate 

 which he has already described. 



* See Phil. Mag. June and July, 1811. 



