_Alteration of Title-pages._--Among the advertisements in the last
_Quarterly_ and _Edinburgh Reviews_, is one which replies to certain
criticisms on a work. One of these criticisms was a stricture upon its
title. The author states that the reviewer had a _presentation copy_, and
ought to have inquired into the title under which the book was sold to the
_public_ before he animaverted upon the connexion between the title and the
work. It seems then that, in this instance, the author furnished the
Reviews with a title-page differing from that of the body of his
impression, and thinks he has a right to demand that the reviewers should
suppose such a circumstance probable enough to make it imperative upon them
to inquire what the real title was. Query, Is such a practice common? Can
any of your readers produce another instance?

M.

_Weights for Weighing Coins._--A correspondent wishes to know at what
period weights were introduced for weighing coins.

He has met with two notices on the subject in passages of Cottonian
manuscripts, and would be glad of farther information.

In a MS. Chronicle, Cotton. Otho B. xiv.--

"1418. Novæ bilances instituuntur ad ponderanda aurea Numismata."

In another Cottonian MS., Vitell. A. i., we read--

"1419. Here bigan gold balancis."

H.E.