Ni'iv Eledrical Experiments, 313 



dnction of the common inoculation in the north of England 

 were to be afcribed. 



This ineftimable difcovery has triumphed over all obftacles 

 as well as over every prejudice in England. Sophifms have 

 been refilled by fails; and it is contrary to the rules of good 

 logic to reply to facts by hvpothefes. The celebrated Doctor 

 David, of Rotterdam, wrote to me in the month of October 

 Lift, that the experiments which he repeated with the matter 

 fent from Boulogne had been attended with the moft com- 

 plete fuccefs ; and Dr. Jenner, the author of this noble dif- 

 covery, informed him at that period, that more than 50,000 

 perfons have been already inoculated with the vaccine in 

 England ; that a third of that number had been expofed to 

 every "left poffible without the fmall-pox ever taking effect: 

 and, in the la ft place, for five years, during which time he 

 has been conllantly employed in repeating the experiments, 

 no one has ever yet refuted this theory, or weakened the con- 

 ciufions he has drawn from it. 



J. M. NOWELL, M. D. 



Boulogne- fur- Mer, 

 Dec. 3, 1800. 



V. A floor t View of the new Electrical Experiments performed 

 by Dr. Van Marum. 



[Concluded from Page 193.] 



1 • VV HEN the conductor at the tower of Siena was- 

 (truck by lightning, feveral perfons, befides the common 

 electric light, clearly obferved on it a regular train of light; 

 and Beccaria gave to this phaenomenon, which he endea- 

 voured, without fuccefs, to imitate with his electric machine, 

 the name of divergent electricity. Mr. Landriani requefted 

 Dr. Van Marum to try an experiment of the fame kind with 

 his large machine. Both thefe philofophers confidered this 

 divergent electricity as an effect of the refiftance which me- 

 tals oppofe to the influx of the electric matter when they 

 have too fmall a diameter, and throw off at the fides the 

 matter not received. To afcertain this fact, an iron wire, 

 - 7 'j qf an inch in diameter, was placed at fuch, a diiiance from 



the 



