via CONTENTS OF VOL. XXVII. — THIRD SERIES. 



Page 



Mr. R. Moon on Fresnel's Theory of Double Refraction .... 553 



Addenda to Mr. Drach's asserted Proof of Fermat's Theorem • 560 



On Respiration, by Prof. Magnus 561 



Analysis of Titaniferous Iron 564 



Analysis of Sphene 565 



Analysis of Cascarilla— Cascarilline, by M. Duval 567 



Spheroidal Condition of Liquids 568 



Meteorological Observations for October 1845 569 



Table 570 



Index'. . ; 571 



PLATES, 



I. Illustrative of Mr. Warren De la Rue's paper on the Structure of 

 Electro-precipitated Metals. 



II. "t Illustrative of Dr. Miller's paper on Lines produced in the Prismatic 



III. J Spectrum. 



IV, Illustrative of Prof. Draper's paper on the Allotropism of Chlorine. 



V. "I Illustrative of Messrs. Binney and Harkness's Account of Fossil Trees 

 VI. J found at St. Helen's. 



Errata and Addenda. 



In the Meteorological Table for March (May Number), the average 

 temperature observed at Sandwick Manse, Orkney, is stated to be 4840 

 instead of 3872. 



Page 1:26, paragraph 2, line 2. On the left-hand side of equation (9.), for 



X read t/. 



... 286, line 2 from bottom, /or pm read p'^. 



... 287, ... 13, the last -|- ought to be — . 



o<» " — 1 • 

 xU, — — IS an exponent. 



... 288, ... 9,f()rz — y rcadz—y. • 



... 363, ... 2, the exponent should be ?j instead of M-f 3. 



... 397, ... 18, /or venal read renal. 



