h ntporl. OuUin. 190S 



JUNE30.08 JANI2.1907 



OSCILLATIONS 



OF PRESSURE 



UNACCOUNTED FOR 



SKEHSlNCTON 



PERIODIC CHANGE^ IN WIND 



yrTEOfOLpGic«_orncE ■_ 





— ^\/NW 



AUGa.l906 



LINE SQUALL [thunder-storm] 

 CAUSING PRESSURE OSCILL/>TIONS. 



MICRO BWOGf AM 



DEC 10.1900 



=1=t£55URE OSCILLATIONS 

 UNACCOUNTED fOP 



JULYI2.I908 



RAPID PRESSURE CHANGES 

 WITHOUT OSCtLLATIONS 



5 KENSINGTON 



lO 



<' ■;- 

 q: 



O LEIGHTON P" 

 O 



fETE RSFIELD 



JUNE I . I908 



LINE SQUALL 



WITHOUT 



PRESSURE 



OSCILLATIONS 



SHEPHtBOS BUSH 



1 W« '/'Jifor// of Wai. 



/ 



