SUPPLEMENTARY   NUMBER. 
3.  No.  289, 
Published  the  First  Day  of  every  Month. — Price  2s.  6d. 
THE 
LONDON,  EDINBURGH,  and  DUBLIN 
PHILOSOPHICAL     MAGAZINE, 
AND 
JOURNAL  OF  SCIENCE. 
Being   a    Continuation   of  Tilloch's   'Philosophical   Magazine? 
Nicholson's  'Journal/  and  Thomson's  '  Annals  of  Philosophy.' 
CONDUCTED  BY 
SIR  ROBERT  KANE,  LL.D.  F.R.S.  M.R.I.A.  F.C.S. 
SIR  WILLIAM  THOMSON,  Knt.  LL.D.  F.R.S.  &e. 
AND 
WILLIAM  FRANCIS,  Ph.D.  F.L.S.  F.R.A.S.  F.C.S. 
FOURTH    SERIES. 
N°  289.— SUPPLEMENT.    JULY  1872. 
WITH  A  PLATE, 
Illustrative  of  M.  F.  Zollner's  Paper  on  the  Origin  of  the  Earth's  Mag- 
netism, and  the  Magnetic  Relations  of  the  Heavenly  Bodies. 
This  Supplement  to  Vol.  XLIII.  is  published  with  the  regular  Number 
for  July,  and  should  be  delivered  with  it  to  Subscribers. 
LONDON: 
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Printers  and  Publishers  to  the  University  of  London.     .•>*" 
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