the different Changes through which our National Architecture
passed, from the Heptarchy to the Reformation. Twelve Steel Engravings and
Woodcuts.

Each Period, except the First, is illustrated by portions of the Interior
and the Exterior of one of our Cathedral Churches of corresponding date,
beautifully engraved on Steel, so presented as to enable the Student to
draw for himself a close comparison of the characteristic features which
distinguish the Architecture of each of the SEVEN PERIODS, and which are of
so striking and simple a nature as to prevent the possibility of mistake.

The First, or Saxon Period, contains so few buildings of interest or
importance, as to render its comparative illustration unnecessary, if not
impossible.

GEORGE BELL, 186. Fleet Street.

* * * * *

Just ready, 8vo., cloth, price 15s.

A TABLE OF ANTI-LOGARITHMS. Containing to Seven Places of Decimals, natural
Numbers, answering to all Logarithms from 0001 to 99999; and an improved
Table of Gauss's Logarithms, by which may be found the Logarithm to the sum
or difference of Two Quantities where Logarithms are given: preceded by an
Introduction, containing also the History of Logarithms, their
Construction, and the various Improvements made therein since their
invention. By HERSCHELL E. FILIPOWSKI. Second edition, revised and
corrected.

The publisher, having purchased the copyright and stereotype plates of
these tables, (published a few months ago at 2l. 2s.,) is enabled to offer
a corrected edition at the above reduced price.

_Testimonial of Augustus de Morgan, Esq._

"I have examined the proofs of Mr. Filipowski's Table of
Anti-Logarithms and of Gauss's Logarithms, and also the plan of his
proposed table of Annuities for three lives, constructed from the
Carlisle Table.

"The table of Anti-Logarithms is, I think, all that could be wished, in
extent, in structure, and in typography. For its extent it is unique
among modern Tables. Of accuracy I cannot speak, of course; but this
being supposed, I have no hesitation in recommending it without
qualification.

"The form in which Gauss's Tables are arranged will be a matter of
opinion. I can only say that Mr. Filipowski's Table is used with ease,
as I have found upon trial; and that its extent, as compared with other
tables, and particularly with other FIVE-FIGURE tables, of the same
kind, w