146 



A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 



remainder of January. Leaving the high rain minimum on January 2 1 (chart 

 9), the cold wave from January 23-26 produces but a small effect, while the 



1903 



*t / v. ., f 



50- F_ 



J_ 



; 



50, 







44' 



-at i 



45' 



34' 



37' 



36" 



33' 



3<r 



40" 



_| 



46' 



51 



a, 

 37' 



ff 



9 10 H - -15 16 



CHART 10. 



high nucleation on January 27 is not foreshadowed by the corresponding march 

 of temperature. 



5. Plate glass apparatus. Apparatus with plate glass windows was first 



1903 



CHARTS n AND 12. 



installed on January 29 and thereafter used permanently. The beginning of 

 February (charts 9 and 10), with its frequent dark fogs and relatively warm 



