Extra Meteorological Observations, 1844. 



319 



ACTINOMETER. 



Makerstoun 



Mean Time 



of 



First Reading. 



In Sun Observation, change 



or I j in 



Shade. iBegun. Ended.! 60". 



Effect 



of 



Sun. 



Mean 



of 

 Group. 



Sun's 

 Alti- 

 tude. 



Makerstoun 



Mean Time 1° Sun 



of «!■ 



First Reading. Shade. 



Observation. 



Begun. Ended. 



Change 

 in 

 60". 



Effect Mean 



of of 



Sun. Group, 



Sun's 

 Alti- 

 tude. 



19 



li. m. 



9 18 58 12 

 59 42 

 42 



2 12 



3 12 



4 42 



5 42 



7 12 



8 12 



9 19 34 12 



35 42 



36 42 



38 12 



39 12 



So. div. I Sc. div. 



Sc. div. Sc. div. 



September 9, 1844. 



13-5 



180 



Sc. div. Sc. div.l Sc. div. 



Sc. div. I Sc. div. 



209 



35-8 



Sept. 9^ IS*" 51™. A few streaks of cirro-strati to S. ; sky rather milky to E. IS*" 5™. Patches of scud forming to W. 



Sept. 9^* 19*^ 34™, Much scud forming to W., moving from about W. ; clear near the Sun. 39™. Scud approaching the Sun; observa- 

 tions bad ; dry thermometer 52°'8 ; wet thermometer 49°'0. 



Sept. 9^ 19'' 53™. The scud has completely passed over the Sun, or has evaporated ; patches on N- and S. horizon. 58™. Dry thermo- 

 meter 53°*3 ; wet thermometer 49°-2. 



Sept. 9'^ 22'' 15™. Scud around but not near the Sun. 20™. Dry thermometer 57'*-7 ; wet thermometer 51°'2. 22™. Patches of scud 

 coming near the Sun. 23™. A small patch very near the Sun, and dissipating. 26™. Scud within 3° of the San. This cannot be consi- 

 dered a very good set of observations. 



