CONTENTS. 
I. Experimental Researches in Electricity . — Nineteenth Series. By Michael Fara 
day, Esq., D.C.L. F.R.S., Fullerian Prof. Chem. Royal Institution, Foreign 
Associate of the Acad. Sciences, Paris, Cor. Memh. Royal and Imp. Acadd. of 
Sciences, Petershurgh, Florence, Copenhagen, Berlin, Gottingen, Modena, Stock- 
holm, Sfc. 8fc page 1 
II. Experimental Researches in Electricity. — Twentieth Series. By Michael Fara- 
day, Esq., D.C.L. F.R.S., Fullerian Prof. Chem. Royal Institution, Foreign 
Associate of the Acad. Sciences, Paris, Cor. Memb. Royal and Imp. Acadd. of 
Sciences, Petershurgh, Florence , Copenhagen, Berlin, Gottingen, Modena, Stock- 
holm, & fc. fyc 21 
III. Experimental Researches in Electricity . — Twenty first Series. By Michael 
Faraday, Esq., D.C.L. F.R.S., Fullerian Prof. Chem. Royal Institution, Foreign 
Associate of the Acad. Sciences, Paris, Cor. Memh. Royal and Imp. Acadd. of 
Sciences, Petershurgh, Florence, Copenhagen, Berlin, Gottingen, Modena, Stock- 
holm, <Scc. 8$c 41 
