ADVERTISEMENT. 
T HE present volume contains 69 papers numbered 417 to 485 published 
for the most part in the years 1866 to 1872; they include a series 
of astronomical papers published in the Memoirs and Monthly Notices of 
the Royal Astronomical Society. 
The Portrait in Volume VI. is from the Painting in Oil by Mr Lowes 
Dickenson in the year 1874, presented by the Subscribers to Trinity College, 
Cambridge, and now in the Hall of the College: the portrait in the 
present volume is a photograph of a pencil sketch by Mr Lowes Dickenson 
in the year 1893. 
The Table for the seven volumes is 
I. Numbers 
1 
to 
100. 
II. 
101 
158. 
HI. 
159 
222. 
IV. 
223 
>> 
299. 
v. 
300 
383. 
VI. 
384 
?? 
416. 
VII. „ 
417 
485.