278 



Extra Meteorological Observations, 1845. 



ACTINOMETER. 



Makerstoun 



Mean Time 



of 



First Reading. 



h. 



In Sun 



or 

 Shade. 



Observation. 



Begun 



Sc. div. 



Ended. 



Change 

 in 

 60^ 



Sc. dir. 



Effect 



of 

 Sun. 



Sc. div. 



Mean 



of 

 Group. 



Sc. div. 



Sun's 

 Alti- 

 tude. 









March 12, 



13. 







12 



23 9 17 



Sun 



21-4 



24- 1 



+ 2-7 









10 42 



Shade 



23-8 



22-7 



-M 



3-6 







11 42 



Sun 



22-7 



25-1 



+ 2-4 



3-5 







13 12 



Shade 



24-7 



23-6 



-M 



3-5 







14 12 



Sun 



23-6 



26-0 



+ 2-4 



3-6 







15 42 



Shade 



25-7 



24-4 



-1-3 



3-8 



3-69 





16 42 



Sun 



24-4 



270 



+ 2-6 



3-8 







18 12 



Shade 



26-8 



25-7 



-11 



3-7 







19 12 



Sun 



25-7 



28-3 



+ 2-6 



3-8 







20 42 



Shade 



27-9 



26-6 



-1-3 



3-9 







21 42 



Sun 



26-6 



29-2 



+ 2-6 



3-9 



1 





23 12 



Shade 



28-9 



27-6 



-1-3 



3-9 







24 12 



Sun 



27-6 



30-3 



+ 2-7 



4-0 







25 42 



Shade 



29-9 



28-7 



-1-2 



3-8 







26 42 



Sun 



28-7 



31-3 



+ 2-6 



39 



4-04 





28 12 



Shade 



30-9 



29-5 



-1-4 



40 







29 12 



Sun 



29-5 



321 



+ 2-6 



41 







30 42 



Shade 



31-6 



30-0 



-1-6 



4-3 







31 42 



Sun 



30-0 



32-9 



+ 2-9 



4-5 







33 12 



Shade 



32-3 



30-8 



-1-5 







12 



23 44 12 



Sun 



20-2 



22-9 



+ 2-7 









45 42 



Shade 



22-6 



2M 



-1-5 



4-1 







46 42 



Sun 



211 



23-7 



+ 2-6 



4-1 







48 12 



Shade 



23-3 



21-9 



-1-4 



3-9 







49 12 



Sun 



21-9 



24-3 



+ 2-4 



3-9 







50 42 



Shade 



23-8 



22-2 



-1-6 



4-0 







51 42 



Sun 



22-2 



24-6 



+ 2-4 



40 



3-96 





53 12 



Shade 



24-0 



22-3 



-1-7 



4-1 







54 12 



Sun 



22-3 



24-7 



-1-2-4 



40 







55 42 



Shade 



24-0 



22-5 



-1-5 



3-9 







56 42 



Sun 



22-5 



24-9 



+ 2-4 



3-8 







58 12 



Shade 



24-3 



22-9 



-1-4 



3-8 







59 12 



Sun 



22-9 



25-3 



+ 2-4 







13 



26 12 



Sun 



9] 



11-3 



+ 2-2 









27 42 



Shade 



111 



100 



-M 



3-3 







28 42 



Sun 



10-0 



12-3 



+ 2-3 



3-4 







30 12 



Shade 



120 



10-9 



-M 



3-4 



3-42 





31 12 



Sun 



10-9 



13-2 



+ 2-3 



3-5 







32 42 



Shade 



12-9 



11-7 



-1-2 



3-5 







33 42 



Sun 



11-7 



14-0 



+ 2-3 







30-5 



30-9 



31-5 



314 



Makerstoun 



Mean Time 



of 



First Reading. 



d. 



13 1 



13 



12 

 42 

 42 

 12 

 12 



8 42 



9 42 



11 12 



12 12 



13 42 



14 42 



16 12 



17 12 



1 30 42 



32 12 



33 12 



34 42 



35 42 



37 12 



38 12 



39 42 



40 42 



42 12 



43 12 



13 1 50 12 



51 42 



52 42 



54 12 



55 12 



56 42 



57 42 

 59 12 



13 2 12 



1 

 2 

 4 

 5 

 6 

 7 

 9 

 10 

 11 



42 

 42 

 12 

 12 

 42 

 42 

 12 

 12 

 42 



12 42 



14 12 



15 12 



In Sun 



or 

 Shade. 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Shade 



Sun 



Observation. 



Begun. 



Sc. div. 



Ended. 



Sc. div. 



Change 

 in 

 60^ 



March 



20- 

 22- 

 21- 



24-1 

 23- 

 25- 

 24- 

 26- 

 25- 

 28- 

 27- 

 29- 

 28-' 



17- 



19- 



IS 



21- 



20- 



23- 



22- 



25- 



24- 



26- 



26- 



19- 



22- 



21- 



24v 



23- 



26-, 



25- 



28- 



27- 



30- 



28- 



17- 



16-. 



19- 



U 



21. 



20- 



23- 



21- 



24- 



23- 



■3 



22-7 



•5 



21-7 



•7 



24-1 



•0 



23-2 



•2 



25-7 



•6 



24-7 



•7 



27-1 



•8 



25-9 



•9 



28-3 



• 1 



27-2 



■2 



29-7 



•4 



28-4 



•4 



310 



•6 



20-2 



•8 



18-7 



•7 



21-5 



■3 



20-4 



•4 



23-3 



•2 



22-2 



•2 



25-2 



•0 



24-2 



•2 



270 



•8 



260 



•0 



290 



•4 



22-6 



•3 



21-2 



•2 



24-5 



•3 



23-3 



•3 



26-6 



•3 



25-3 



•3 



28-7 



•3 



27-2 



•2 



30-5 



•2 



28-9 



■9 



32-2 



•4 



16-3 



•3 



19-8 



•4 



18-3 



• 3 



21-7 



3 



20-0 



■0 



23-4 



■0 



21-8 



•8 



25-0 



■6 



230 



■0 



26-2 



Sc. div. 



13. 

 + 2-4 

 -0-8 

 + 2-4 

 -0-8 

 + 2-5 

 -0-9 

 + 2-4 

 -0-9 

 + 2-4 

 -0-9 

 + 2-5 

 -10 

 + 2-6 



+ 2-6 

 -M 

 + 2-8 

 -0-9 

 + 2-9 

 -10 

 + 3-0 

 -0-8 

 + 2-8 

 -0-8 

 + 3-0 



+ 3-2 

 -11 

 + 3-3 

 -10 

 + 3-3 

 -10 

 + 3-4 

 -11 

 + 3-3 

 -1-3 

 + 3-3 

 -11 

 + 3-5 

 -11 

 -I-3-4 

 -1-3 

 + 3-4 

 -1-2 

 + 3-2 

 -1-6 

 + 3-2 



Effect 



of 



Sun. 



Sc. div. 



Mean 



of 

 Group. 



Sc. di' 



Sun's 

 Alti. 

 tude. 



3-2 





3-2 





3-2 





3-4 





3-3 





3-3 



3-33 



3-3 





3-3 





3-4 





3-4 





3-6 





3-8 





3-8 





3-7 





3-9 





3-9 



3-78 



3-9 





3-7 





3-6 





3-7 





4-3 





4-4 





4-3 





4-3 



4-37 



4-4 





4-4 





4-5 





4-5 





4-6 





4-5 

 4-5 



4-53 



4-6 





4-5 





4-6 



^ 



4-7 





4-6 

 4-5 



4-63 



4-6 





4-8 





28-( 



27-1 



27-: 



26. 



March 12<i 23i> 16™. Small patches of cloud coming near the sun. 21™. Patches of very thin cloud coming over the sun occasionally; 

 they seem not to affect the indications of the instrument. 33™. Quite clear since 2.5™ ; dry thermometer 29°'8 ; wet thermometer 26 '1. i 



March IS"' 1^ 2™. Observations made on the south side of the Observatory ; no clouds near the sun. 5™. A patch of cloud about 10 to i 

 eastward of the sun. 6™. A patch of cloud passed near the sun ; no others passed within 15° of the sun. 18™. Dry thermometer 33°'l; 

 wet thermometer 27°'7. ' 



March 13<i 1^ 30™. Observations made within the porch of the Observatory. I 



March 13<i 2"^ 4™ 0=. The screw of the actinometer withdrawn a little. 



March 13"! 2'' 9™. Very thin clouds about 25° to westward of the sun ; they seem to disappear when within 20° of him. 15™. Patches f 

 of cloud coming within 10° of the sun. j 



