Notices respecting JS T eio Books. 141 



preferred. According to Professor Dewar, who has had great 

 experience in the use of such tubes for similar purposes, it 

 would not be advisable to have the S tube less than 2 millims. 

 internal diameter. In all cases, on account of the unavoid- 

 able irregularities in so long a tube, T presume as many as 

 possible comparisons should be made with a standard baro- 

 meter and the intermediate graduations introduced by inter- 

 polation. In the straight one mentioned above, the gap in the 

 mercury thread is seen' through a lens to be in constant agi- 

 tation. 



XXI. Notices respecting New Books. 



The Vocabulary of Philosophy, Mental, Moral, and Metaphysical : 

 ivith quotations and references for the use of Students. By 

 "William Elemimg, D.D., late Professor of Moral Philosophy in 

 the University of Glasgow. Third Edition. Edited by Hejstry 

 Callerwood, LL.D., Professor of Moral Philosophy in the Uni- 

 versity of Edinburgh. London : Charles Griffin and Company, 

 Stationers' Hall Court. 1876. Crown 8vo. 540 pages. 



r PHE object of: this work is sufficiently described by its title-page. 

 The editor justly remarks that the fact of its having " soon passed 

 through two editions shows that it has supplied a want felt by those 

 entering upon philosophic study." It contains a number of short 

 articles explaining and illustrating the meaning of about 800 words. 

 The articles vary in length from six or eight lines to two or three 

 pages. In one case an article (that on Idea) extends to seven 

 pages. The exposition of the meaning of the words is mainly 

 effected by illustrative extracts, a method which gives variety aud 

 interest to the discussion. Indeed the book might be fairly called 

 an entertaining book, in the way in which books of detached 

 ''Thoughts," or " Guesses at Truth," or "Table Talk" are enter- 

 taining. Besides, words are used with different shades of meaning 

 by different authors according to the cast of the opinions they have 

 embraced ; and this difference is best shown by actual quotation. 



An account of a single article will sufficiently exhibit the method 

 of the book ; we will take that on Experience. It consists, in the 

 first place, of a statement that, "according to Aristotle (Analyt. 

 Poster, ii. 19), from sense comes memory, but from repeated remem- 

 brance of the same thing we get experience." Wolf and Whately 

 are quoted to bring out the meaning of the word more fully. 

 Locke is then quoted to exhibit the view that experience is the sole 

 source of knowledge ; and Sewell for the opposite view, that men 

 have knowledge d priori. The article ends with quotations from 

 Boscovich and Herschel, pointing out the distinction between ex- 

 perience derived from observation and from experiment. This is 

 the article as originally written by Dr. Fleming. The editor, how- 

 ever, has inserted two paragraphs, which are distinguished by being 



