MARCH 1885. _ No. 118. 
Published the First Day of every Month.—Price 2s. 6d. 
THE | 
LONDON, EDINBURGH, anp DUBLIN 
| PHILOSOPHICAL MAGAZINE, | 
AND 
JOURNAL OF SCIENCE. 
Being a Continuation of Tilloch’s ‘Philosophical. Magazine,’ 
Nicholson’s ‘Journal,’ and Thomson's ‘Annals of Philosophy.’ 
tas at SE ee 
RY Bebe i ELL TD 
CONDUCTED BY 
. SIR ROBERT KANH, LL.D. F.R.S. M.R.LA. F.C.S8. 
SIR WILLIAM THOMSON, Knr. LL.D. F.R.S. &e. 
AND 
WILLIAM FRANCIS, Pu.D. F.L.S. F.R.A.S. F.C.S8. 
NN eo. ee ear ee ay 
FIFTH SERIES. | 7: 
N° 118,.—MARCH 1885. \, 
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