( viii ) 



PLATES. 



Page 



Applications of Photography .. .. .. .. 263,265 



Crystallisation .. .. .. .. .. ,. 386 



Spectra of Sirius and a Aurigae .. .. .. .-. 408 



Apparatus for Liquefaction and Solidification of Gases .. 483 



Apparatus employed at the Faraday Centenary Lecture by 



Professor Dewar .. .. .. .. .. 484 



Spectra of New Star in Auriga, Plates I. and II. .. .. 618 



