424 On the Lifluence of Electro -magnetism upon Flame. 



be placed at an angle and touch at two corners; the flame 

 placed within the base of this triangle, generally manifests the 

 two phsenomena indicated. 



VI. That thei'e is a certain mass of the contacts {or keeper 

 pieces) "vohich is the most efficacious : bej/ond a limits nsohich can 

 he shown by experiment^ increase of the mass causes a diminution 

 of the effect: from this I found the cause of my negative 

 results, which I obtained in Venice in the first experiments 

 that I made. 



VII. That the movements of the fame increase isoith the 

 number of the pairs {of battery plates). With one pair the 

 effect was not perceptible to me* : with two pairs the movements 

 began to show themselves ; with three pairs they became distinct, 

 and increased with the increase of the number of pairs up to ten, 

 which was the greatest that I employed in this experiment. The 

 pairs were of the known ordinary size. 



On the repetition of the phaenomena as above stated, the 

 precaution was taken to cover the apparatus with a bell, which 

 was open above and supported by two discs below, which left 

 a free access to the air, by which to support the combustion : 

 in this manner all agitation and danger of disturbance under 

 the circumstances were avoided. 



I must not forget, in concluding this article, to state that 

 the celebrated Prof. Gazzaniga, starting from his numerous 

 experiments, which demonstrate the influence of magnetism 

 upon the same aeriform fluids, in a manner therefore different 

 from that of Bancalari, was induced to consider the sun and 

 all the other celestial bodies as so many enormous magnets; 

 by which he established that attraction is merely an effect of 

 the magnetism of the great celestial masses placed at an 

 enormous distance, — an idea which reappeared in IH^Q in 

 Prussia, and in ISi? in France, as we see fi'om the Comptes 

 Mendus of the Royal Academy of Sciences at Paris, The 

 mystery that attraction operates at a distance without inter- 

 media would be removed in this case, and the phaenomena of 

 attraction would enter again into the class of those of common 

 dynamics. 



Dalla Gazz. Piem,, Oct. 12, 1847, No. 242. 



• Messrs. Jest prepared for me last evening an electro-magnet of a 

 circular form interrupted by a prismatic section having an interval of two 

 millimetres ; and I had, without need of contact pieces, the phaenomena 

 distinct with a single element. The most conspicuous movements here 

 appeared in the greater proximity of the flame to the section. 



The complete apparatus, of a circular form, furnished with a glass bell 

 with its accessories is sold in Turin by Messrs. Jest, at the price of thirty 

 francs, not including the electro-motor. 



