TRANSACTIONS OF THB SECTIONS. SSf 



and strength seems much greater than that of the Belgians (taken 6-001 

 persons of a similar class). 



3. So far as the limited results for the English and Irish are worthy 

 of confidence, (and they agree in all the three particulars just specified,) 

 the English are less developed than the Scotch, but more than the 

 Belgians, — the Irish more developed than either. 



4. The mean weight, height, and strength of a Scotchman 25 years 

 of age appears to be (from above 500 experiments used in approxi- 

 mating to the curve), weight 152-5lbs., height 69*3 inches, strength of 

 muscles of the back by Regnier's dynamometer 4201bs. 



The Rev. W. Whewell gave a further account of his Anemometer, 

 previously exhibited and described by him, the instrument being now 

 completed and put in operation. It consists of a small wind wheel, (like 

 a windmill with eight sails,) which is kept towards the wind by a vane. 

 The rapid rotation of the wheel is, by a train of toothed wheels and 

 screws, converted into a slow vertical motion, which carries a pencil 

 downwards, tracing a line on the surface of a vertical cylinder, having 

 the axis of the vane for its axis. The extent of vertical motion shows 

 the amount of the wind, and the part of the circumference of the cy- 

 linder on which the trace lies, shows the direction. 



The observation is made by clamping the vane, so that a vertical scale 

 (of tenths of an inch) coincides with the mean direction of the trace ; 

 the amount of wind may then be read off on the scale, and the direction 

 on a circle of the cylinder. 



Mr. Whewell proposed that the wind should be registered by writing 

 the directions of the compass which it successively assumed, and beneath 

 each direction the amount of wind in that direction shown by the scale. 

 Thus : 



The observations in July, 1836, were 



But the common notation for the points of the compass is incon- 

 venient, from its not showing at once the relation between the different 

 directions. Mr. Whewell proposes the following notation : 



