ADVERTISEMENT. 
T11HE present volume contains 64 papers numbered 159 to 222 originally 
published in the years 1857 to 1862: the chronological order is 
slightly departed from for the sake of including a series of papers in the 
Memoirs and the Monthly Notices of the Royal Astronomical Society: 
there are thus some earlier papers which have been left over for the next 
volume. 
As papers are referred to by their Numbers only it will be convenient 
to give in each volume a Table such as the following: 
Vol. I. Numbers 1 to 100. 
„ II. „ 101 „ 158. 
„ III. „ 159 „ 222.