398 Notices respecting Neio Books. 



Gentlemen, — 



DR. CAMPBELL mentions on p. 29 of his book three 

 classes of judgments which he believes satisfy his 

 criterion : they include judgments of betweenness in time 

 and in space and judgments of number. We would say 

 that the making of each of these judgments is a logical or an 

 experimental process. We were considering only funda- 

 mental judgments, and regret that in criticising the criterion 

 we did not make it clear that he applied it only to those 

 classes of judgments which he treats as fundamental ; we 

 apologise if we have misrepresented him on any important 

 matter. We suggest that in oar paper the words ;; as 

 fundamental" should be inserted after "admissible.''' 



We think Dr. Campbell must have misunderstood us, for 

 the only argument we used that has any counterpart on 

 pp. 21-22 of his book was directed against a view that we 

 explicitly stated he did not hold. The argument we directed 

 against the doctrine of universal consent was based on the 

 obvious facts that the fundamental judgments depending on 

 experience are judgments of sensation, each of which is 

 absolutely private to one individual, and that the judgments 

 of others can be utilised only as constituent elements in 

 individual judgments. We did not consider whether judg- 

 ments about the opinion of others are ever used in science, 

 or even whether they can be correct ; we were concerned 

 only to point out that they are not fundamental, and require 

 much further analysis before they can be used in a theory of 

 scientific or other knowledge. This argument stands without 

 alteration. Yours faithfully, 



D. M. Wrinch, 



192] December 22. HAROLD JEFFREYS. 



XLIV. Notices respecting New Books. 



Meteorology : an Introductory Treatise. By A. E. M. G-eddes, 

 O.B.E., M.A., D.Sc, Lecturer on Philosophy in the University 

 of Aberdeen. [Pp. xx-f 390, with 20 plates, 103 figures, and 

 11 charts.] (London, Blackie and Son. 1921. Price21s.net.) 



T\7ITHIjN recent years the development of meteorology has been 

 *^ so rapid and it has increased in practical importance to such 

 an extent, that this concise and up-to-date introductory treatise is 

 very welcome. In writing a volume of this nature, it is always 

 somewhat difficult to decide what to include and what to omit, 

 and no two authors would adopt exactly the same point of view. 

 Allowing for such personal differences, the author appears to 

 have succeeded in including all that is of importance for the 

 beginner, and in avoiding the development of one part of the 

 subject at the expense of another. The chapters on atmospheric 



