304 Mr WHEWELL'S RESULTS OF OBSERVATIONS 



3. To read off the amount of the wind in each of these successive 

 strips; — slide the lower index so that the point is upon the top of the 

 first strip ; then slide the upper index to touch the lower ; then slide 

 the lower index to the bottom of the first strip, or the top of the second 

 strip of wind; then read off on the graduated rod, the interval (in 

 tenths of inches,) through which the lower index has moved ; then 

 again slide down the upper index to touch the lower, slide down the 

 lower index to the bottom of the second strip, and read off the interval ; 

 — and so on. Write down these intervals under the corresponding 

 directions of the strips of wind, observed as above. 



4. When the pencil has reached the bottom of the barrel, the in- 

 strument must be wound up, by unscrewing the clamping screw of 

 the nut, removing it to the top of the barrel, and clamping it. 



At the same time the barrel inust be cleaned, by rubbing it with 

 a soaped cloth enclosing a smooth wooden rubber. 



5. The following is suggested as a simple way of marking the 

 points of the compass ; for example, from the North to the East the 

 points may be 



N. Ne. NNE. NEm. NE. NEe. ENE. E«. E. 



and so on for the other quadrants. 



The only ambiguities which can arise by this method, are Ne, Nw, 

 Se, Sw; which must be distinguished from NE, NW, SE, SW. 



Ne is N 5y E ; and so of the rest. 



I shall now give the Register of the Avind as observed for the 

 months of January, February, March and April of the present year 

 at the Society's house. I shall add also the observations made at the 

 Observatory for a portion of the month of February. The readings 

 are in tenths of inches on the scale. 



* The asterisk indicates the times when the instrument was wound 

 up. * 



