PLATES. 



I. Illustrative of Prof. Bunseu's Paper on the Law of Absorption of 

 Gases. 



II. Illustrative of M. A. J. Angstrom's Optical Researches. 



III. Illustrative of Dr. Herapath's Paper on the Properties of the Sulphate 



of Iodo-quinine or Herapathite. 



IV. Illustrative of Prof. Tyndall's Paper on the Polymagnet. 



V. Illustrative of M. Verdet's Paper on the Optical Properties developed 

 in Transparent Bodies by the action of Magnetism. 



ERRATUM IN VOL. VIII. 



In Table I., p. 421, in the second line of the column headed " Masses," 

 for 20 21 read 1(F. 



ERRATA IN VOL. IX. 



Page 243, foot note, last line, for against read with; and for DC read AB. 



— — last line but two, for with read against. 



— — — for AB read DC. 



— — line 6 from foot, for A read D. 



— — — for B read C. 

 Page 354, line 23, for £th read T Vth. 



