APPENDIX. 59 



on Long Island. Static electricity was used to 

 make a record on a strip of moving litmus paper, 

 and the alphabet was spelled out by the intervals 

 between the sparks passing. /&., 1st Ed., 1852, 

 p. 6. 2d Ed., p. 22. 



NOTE I, PAGE 35. 



" Schweigger's Journal fiirChemieundPhysik." 

 1811. Vol. II., pp. 217, et seq. 



NOTE K, PAGE 35. 



This was Bains' English patent. The same sys- 

 tem has been several times tried here, but with no 

 great success. The Little-Edison " automatic " or 

 "fast line " to Washington some years ago, worked 

 on this plan ; and more recently the Eapid, and the 

 Postal Telegraphs. In all cases, however, an elec- 

 tro-magnetic attachment is needed to give the 

 alarm, and correct the errors. 



NOTE L, PAGE 36. 



Journal of the Society of Arts. July 29, 1859. 

 Vol. VII., pp. 606-7. 



NOTE M, PAGE 36. 



Gottingische Gelehrte. Aug. 9, 1834. Part II., 

 No. 128, pp. 1272-3. 



NOTE N, PAGE 39. 



Faraday had used Henry's quantity magnets in 

 his experiments ; but he does not seem to have 

 considered the effect of the combination of an 

 intensity battery with an intensity magnet, for 



