1890.] Relations between the Sills and Plains of Northern India. 41 



self registering anemographs during the month of January 1889, and 

 illustrates this feature of the air motion. 



The following table gives the amount of wind during the day and 

 night hours 





Eoorkee. 



Lucknow. 



Date. 



Amount of wind in miles. 



Amount of wind in miles. 





6 A.M. — 6 P.M. 



6 P.M. — 6 A.M. 



6 A.M. — 6 P.M. 



6 P.M. — 6 A.M. 



1st January 1889. 



32 



3 



60 



24 



2nd 



1 







31 



24 



3rd 



33 







15 



12 



4th 



20 







13 



11 



5th 



2 



2 



12 



6 



6th 



12 



2 



43 



39 



7th 



30 



10 



49 



28 



8th 



14 



6 



53 



24 



9th 



14 



7 



30 



2 



10th 



55 



13 



4 



2 



Uth 



20 







5 



1 



12th 



1 



17 



17 



16 



13th 



44 







41 



5 



14th 



2 







3 



6 



loth 







2 



13 



9 



16th 



2 



2 



45 



17 



17th 



5 



4 



33 



13 



18th 



4 



10 



41 



42 



19th 



39 



18 



100 



47 



20th 



29 



3 



103 



48 



21st 



4 







26 



17 



22nd 



18 



21 



40 



11 



23rd 



29 







14 



15 



24th 



13 



4 



6 



2 



25th 



19 







23 



6 



26th 



6 



2 



4 







27th 



6 



4 



4 



3 



28th 



1 



34 



10 



8 



29th 



57 



153 



102 



100 



30th 



63 



25 



155 



25 



31st 



26 



1 



57 



11 



Average of period 



from 1st to 27th. 17 miles. 4-5 miles. 31 miles. 16 miles. 



These figures shew very clearly the quiescent state of the atmosphere 

 in Northern India during the cold weather and more especially at night.- 

 This is especially observable in the periods of ordinary anti-cyclonic 

 conditions. 



In fine clear weather the range of temperature is large. It aver- 

 ages 27° for the whole of the Punjab for the month, and in fine clear 

 weather usually varies little from 36°F. or 20°C. The range at the hill 

 stations is much less, averaging 15° and rarely exceeding 18°, even in 

 6 



