69-2 



MR JOHN AITKEN ON THE NUMBER OF DUST PARTICLES IN THE 



Table III. — The Number of Dust Particles in the Atmosphere for 1893 — continued. 









O m 





, 



>s 







Place. 



Date. 



Hour. 



Number 



Particle 



per c.c. 



Wind. 



03 

 - 



as 



05 



H 



4a 



a 



w 



State of 

 the Air. 



Remarks. 





July 

















KlNGAIELOCII 



20 



1 P.M. 



476 



W.N.W. 4 



57 



4-5 



1 



Showers. 







4 P.M. 



336 



W. 4 



52-5 



0-5 



i) 



Raining heavy. 







7 P.M. 



725 



>) 



52 



1 



>> 



Raining. 







9.30 p.m. 



700 



N.W. 3 



j) 



2-5 



>> 



Showers. 



i) 



21 



9 A.M. 



329 



W. 0-5 



54 



3-5 



Very clear 



(200). Cloud i ; been 

 raining. 







10 A.M. 



392 



j> 



57 



5-5 



>) 



(200). Cloud i 







1 P.M. 



560 



W. 1 



56 



35 



n 



(200). Cloudy 







2 P.M. 



588 



>> 



57-5 



5 



» 



In Loch Corry. 







2.30 p.m. 



581 



S.W. 2 



58 



5-5 



)> 



(200). Cloud \; in Loch 

 Linnhe. 







3 P.M. 



483 



>> 



>) 



>> 



)) 



i) >) 





Sept. 

















Alford . . 



1 



10 A.M. 



525 



W.N.W.0-2 



59 



1 



Thickish 



Clouded over ; raining. 







11.30 A.M. 



248 



W.N.W. 1 



59-5 



2-5 



Very clear 



Fair, but clouded over. 







1 P.M. 



252 



)> 



61 



4 



)> 



Dull. 







6 P.M. 



252 



N.W. 2 



59 



35 



>) 



No rain since morning. 



)J 



2 



9 A.M. 



231 



N.N.W. 1 



)> 



>) 



jj 



Clouded over. 







10 A.M. 



245 



N.N.W. 2 



)j 



i) 











6 P.M. 



1,825 



N.E. 0-5 



55 



3 



Medium 



Cloud h- 



)) 



4 



9 A.M. 



3,000 1 



Calm 



58 



3-5 



Thickish 



(30). 







11 A.M. 



2,250 



S.E. 0-2 



63 



5-5 



it 



Cloud h, thin. 







4.30 P.M. 



1,660 



E. 0-2 



69 



8 



)) 



(40). Cloudless. 







7 P.M. 



3,500 



S.E. 0-2 



56 



1-5 



;? 



)> )» 



}y 



5 



10 A.M. 



2,800 



>) 



64 



4-5 



)> 



j' >i 







11.30 A.M. 



1,400 



S. 0-2 



66 



7-5 



Clear 



(100). Cloudless. 







6 P.M. 



975 



W. 0-5 



60 



4-5 



jj 



Cloud £. 



It 



6 



9 A.M. 



485 



N.W. 0-5 



59-5 



6 



Very clear 



(200). Cloudless. 







1 P.M. 



434 



W.N.W. 1 



63 



8 



)j 



(200). Thin clouds £. 







6 P.M. 



549 



W. 0-2 



56 



3 



Medium 



Clouded over; beginning 

 to rain. 



)) 



7 



10 A.M. 



700 



W.N.W.0-2 



)» 



1-5? 



Very clear 



(200). Clouded over; 

 been rain lately. 







10.30 A.M. 



554 



JJ 



58 



2-5 



jj 









1 P.M. 



490 



W. 1 



59 



4 



n 



Cloud ,V 







3 P.M. 



455 



N.N.W. 0-5 



61 



6 



j j 



Cloud J, 







6 P.M. 



2,300? 



Calm 



54-5 



1? 



5) 



Been raining. 



,) 



8 



10 A.M. 



483 



N.W. 1 



56-5 



5-5 



Clear 



Cloud -k 







1 P.M. 



675 



N.E. 2 



50-5 



2-5 



Medium 



Clouded over; been rain- 







4 P.M. 



800 



>> 



50 



3-5 



Clear 



ing. 

 Cloud i ; been raining. 







6 P.M. 



1,025 



N.E. 0-5 



47 



2-5 



Medium 



Cloud |. 



)! 



9 



9 A.M. 



539 



N. 2 



i) 



3-5? 



)) 



Cloud | ; been rain 

 during night. 







10 A.M. 



427 



)) 



>> 



4 



)> 









12 



737 



)» 



48 



4-5 



Very clear 



(200). Cloud \. 







5 P.M. 



1,475 



») 



44 



1-5? 



>> 



Cloudedovcr; beginning 

 to rain. 







6 P.M. 



950 



N. 1 



44 5 



2-5 



Clear 



Cloud J. 



M 



11 



9 A.M. 



6,000 ? 



Calm 



48 



3 



>» 



Cloudless. 







10 A.M. 



7,000 ? 



>) 



51 



4 



i) 



(100). 







11 A.M. 



2,650 ? 



?> 



54 



6-5 



it 



Cloud, cirrus only. 







2 P.M. 



6,300? 



>» 



56 



5 



it 



!) )» 



