On ike Classification of Heavenly Bodies. 157 



January 10, 1889. 

 Professor G. G. STOKES, D.C.L., President, in the Chair. 



The Presents received were laid on the table, and thanks ordered 

 for them. 



The following Paper was read : 

 "APPENDIX TO THE BAKERIAN LECTURE,* SESSION 1887-88." 



By J. NORMAN LOCKYER, F.R.S. Received November 22, 



1888. 



CONTENTS. 



INTRODUCTION. 



I. " ON THE SPECTRA OP METEORIC SWABMS IN THE SOLAR SYSTEM." 

 1. Views of Reichenbach, Schiaparelli, and Tait. 



II. Comets at Aphelion, Lowest Temperature. 

 Magnesium Radiation \ 5210. 

 Carbon Radiation. 



HI. Comets about Mean Distance 2nd Stage of Heat. 

 Magnesium Radiation A 5210. 

 Carbon Radiation. 



Irregularities Observed in the Citron Fluting. 

 Manganese Radiation. 



IV. The Stage Immediately Preceding Perihelion. 

 Manganese Absorption. 

 Lead Absorption. 

 Carbon Absorption. 

 Iron Absorption. 



VThe Final Stage of Heat Perihelion. 

 Manganese Radiation. 

 Carbon Radiation. 



The Perihelion Conditions of the Great Comet of 1882. 

 The Perihelion Conditions of Comet Wells. 

 Line Absorption at Perihelion. 

 VI. General Statement with Regard to Carbon. 



* The title of the Bakerian Lecture was : " Suggestions on the Classification of the 

 various Species of Heavenly Bodies." A Report to the Solar Physics Committee. 

 Communicated at the request of the Committee. 



VOL. XLY. M 



