labouriously-executed a work should have its most minute and unimportant
details as correct as possible. This, in such a work, can only be
effected by each reader pointing out the circumstances that he has
reason to believe are not quite correctly or completely given in it.

Page 24. _Astronomical Society._--The library has been recently
augmented by the incorporation with it of the books and documents (as
well as the members) of the _Mathematical Society of London_
(Spitalfields). It contains the most complete collection of the English
mathematical works of the last century known to exist. A friend, who has
examined them with some care, specifies particularly some of the tracts
published in the controversy raised by Bishop Berkeley respecting "the
ghosts of departed quantities," of which he did before know the
existence.

The instruments to which Mr. Cunningham refers as bequeathed to the
Society, are not used there, nor yet allowed to lie unused. They are
placed in the care of active practical observers, according as the
special character of the instruments and the special subjects to which
each observer more immediately devotes his attention, shall render the
assignment of the instrument expedient. The instruments, however, still
remain the property of the Society.

P. 37. _Bath House._--Date omitted.

P. 143.--Evan's Hotel, Covent Garden, is described as having been once
the residence of "James West, the great collector of books, &c., and
_President of the Royal Society_." There has certainly never been a
President, or even a Secretary, of that name. However, it is just
possible that there might have been a Vice-president so named (as these