84 



Daily Meteorological Observations, April 26 — May 4. 1842. 













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ters, alt 



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Clear : calm. 

 Id. 

 Id. 

 Id. 



Overcast. 



Cir.-str. to N. and NE. 



Cir. and cir.-str. to N. and SE. 



A low line of cir.-str. to NE. 



Cir.-str. to SW. 



Clear. 



Cir.-str. to SW. and W. 



Cir. and cir.-str. to SW. and W 



Overcast. 



Cumuli. 



Cum. on hor. from SE. round b 



A small patch of cir.-str. to NE 



Clouds breaking. 



Sky milky : cirro-strati to S. 



Scattered cumuli. 



Cumuli chiefly to W. and NW. 



Sky milky to E. : streaks of cir 

 Detached cum. : bands of cirro- 

 Cum. with cir. tails : cir.-cum. : 

 Electric-looking cumuli : sky mi 



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louds, 10 no sky. The estimations were made in unit 



s. 



comparison with the Anemometer erected Oct. 21, th 



are foot of surface : for estimations beyond 1'5 the v 



ds, but no adjustment required. 



nth, however, was preserved. 



ch are in the meridian and prime vertical. 



ered that the silk round the bulb had lost its power o 



the observations for some days previous to May 4. 







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antity of clouds is to 10 ; indicating no c 

 s of sky ; O'l small patch or patches of cloud 

 wind was to 6 ; it was found, however, on 

 ometer, that is, pounds of pressure on the squ 



a handkerchief. 



erified, which was done at intervals afterwar 

 during the month of May, the sum for the mo 

 reference to the walls of the Observatory, whi 



are given till May 18*, as it was then discov 

 May 4'! valueless ; probably this even affects 







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7*. The scale used in the estimation of the qu 

 n decimals. 9'9 signifies small patch or patche 

 le used in the estimations of the force of the 

 equivalent to the same quantities by the Anem 

 uble the value at 3-0. 



ection of the wind is estimated with the aid of 

 and 23<i. Perpendicularity of the barometer \ 

 The readings of the rain gauge B. were lost 

 The motion of the clouds are determined by 

 Sh. No readings of the wet bulb thermometer 

 nt as to render the mass of the readings from 

 not changed the silk for some time. 







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