366 Proceedings of the British Association. 



remarked, that the data for the Irish and English were not suf- 

 ficiently accurate to justify any general conclusions. 



A paper from Dr Collins on periodicity of birth was read. 



Baron Dupin exhibited two maps of Britain, coloured on 

 Guerry's plan, to illustrate Criminal Statistics, and their relation 

 to density of population and education. The latter was both the 

 more prominent, and, in relation to subsequent discussion, the more 

 important branch of the Baron's observations. He drew a distinc- 

 tion between moral and physical education, describing the latter as 

 an indifferent instrument capable of being applied either to good or 

 evil. He then briefly glanced at the proportion between juvenile 

 offenders in England and France, stating as a general result, that 

 the young criminals of England more frequently reformed than 

 those of the Continent. 



Friday^ August 26. 

 Section A. — Mathematical and Physical Science. 



Mr Whewell read a papfer on a new Anemometer. In this com- 

 munication Mr W. explained a method of tracing or registering 

 the course of the winds through a given period by the motion of 

 a pencil, on an appropriate scale, so as to obtain eventually a true 

 type of the winds, which has never yet been arrived at by other 

 instruments. 



Professor Phillips read a Notice of the probable Effects of ele- 

 vated Ground in the Direction of the Lines of equal Magnetic 

 Dip. 



Professor Stevelly read a Paper on the Mathematical Rules for 

 constructing Compensating Pendulums. 



Telescopes. — Sir D. Brewster read a paper describing a contri- 

 vance by which he was enabled to render distinct the dark lines of 

 the spectrum under the most unfavourable circumstances, and ob- 

 tain other useful effects. The method was to introduce a cylindri- 

 cal refractor between the eye and the eye-glass of the telescope, 

 the effect being, as he shewed, to give a linear form to a most ir- 

 regular image. 



Mr Russell read a paper on certain Elements of the resistance 

 of Fluids that appear to be intimately connected with the Applica- 

 tion of Analysis. 



