Appendix — Statistical Tables. 



443 



Table F. — D. hyalina. Average, maximum, and minimum numbers. 

 Percentile vertical distribution. 











Per cent, in each 3 ] 



VI. LEVEL. 





Av. 



Max. 



Min. 

















0-3. 



3-6. 



6-9. 



9-12. 



12-15. 



15-35. 



1894. 





















July 1-15.... 



19.8 



32.8 



8.5 



38.1 



23.4 



20.2 



14.1 



3.2 



0.9 



July 16-31... 



13.3 



34.4 



2.7 



43.4 



33.5 



19.7 



2.5 



0.9 



0.0 



Aug. 1-15... 



16.6 



33.3 



9.3 



43.5 



26.5 



23.5 



6.2 



0.0 



0.3 



Aug. 16-31.. 



60.7 



82.7 



47.8 



42.7 



29.0 



22.2 



4.2 



0.0 



0.0 



Sept. 1-15... 



No ob 



servat 



ions. 















Sept. 16-30.. 



148.4 



212.7 



74.4 



30.6 



25.2 



21.1 



16.3 



6.0 



0.8 



Oct. 1-15.... 



207.6 



461.7 



117.3 



32.0 



26.1 



17.5 



9.7 



6.2 



8.4 



Oct. 16-31 .. 



252.5 



531.0 



96.3 



31.7 



19.6 



17.1 



11.7 



11.6 



8.3 



Nov. 1-15.... 



183.1 



462.6 



92.2 



37.1 



21.3 



13.9 



12.2 



8.9 



6.6 



Nov. 16-30.. 





No ob 



servat 



ions. 













Dec. 1-15.. ) 

 Dec. 16-31 J 



121.5 



154.2 



78.2 



41.1 



16.0 



16.7 



12.0 



8.7 



5.5 



(48.8) 



56.9 



40.7 















1895. 





















Jan. 1-15 



40.8 



65.4 



36.7 



24.1 



18.7 



16.7 



18.7 



10.9 



10.9 



Jan. 16-31 . . 



55.9 



61.0 



53.4 



30.4 



27.7 



5.3 



11.2 



12.7 



12.7 



Feb. 1-14 ) 

 Feb. 15-28 J 

 Men. 1-15 . . 



65.8 



109.4 



41.9 



18.1 



19.9 



11.0 



9.8 



20.6 



20.6 



34.7 



69.3 



25.6 



22.9 



26.9 



19.2 



12.4 



9.1 



9.5 



Mch. 16-31.. 



63.6 



102.3 



39.1 



28.1 



22.7 



8.1 



8.1 



16.5 



16.5 



Apl. 1-15.... 



26.4 



24.2 



12.7 



42.7 



21.0 



10.1 



7.5 



9.3 



9.4 



Apl. 16-30 . . 



16.3 



43.8 



3.2 



37.5 



29.7 



9.4 



11.3 



5.1 



7.0 



May 1-15.... 



28.9 



81.4 



7.9 



67.0 



22.2 



5.7 



2.6 



1.3 



1.1 



May 16-31 . . 



250.7 



349.8 



71.2 



59.1 



24.3 



9.9 



3.0 



2.3 



1.4 



J une 1-15 . . 



319.2 



564.8 



183.1 



42.2 



19.4 



12.5 



11.5 



6.6 



7.8 



June 16-30.. 



135.6 



327.5 



31.8 



51.0 



13.3 



19.2 



6.6 



4.3 



5.5 



July 1-15.... 



139.9 



263.9 



21.0 



56.1 



20.9 



17.7 



4.4 



0.5 



0.4 



July 16-31 . . 



275.3 



464.3 



129.7 



58.3 



24.1 



15.7 



0.9 



0.2 



8 



Aug. 1-15 .. 



273.0 



417.2 



78.2 



47.6 



26.6 



13.8 



10.7 



1.1 



0.3 



Aug. 16-31 . . 



252.8 



428.6 



143.1 



51.1 



17.6 



17.8 



12.6 



0.7 



0.2 



Sept. 1-15 . . 



202.8 



349.1 



169.8 



49.5 



23.2 



21.3 



4.6 



1.1 



0.3 



Sept. 16-30.. 



201.6 



248.0 



148.1 



37.0 



20.8 



16.9 



11.4 



9.6 



4.3 



Oct. 1-15.... 



180.5 



253.1 



123.3 



36.9 



14.9 



12.1 



12.5 



10.9 



12.7 



Oct. 16-31 .. 



76.6 



111.3 



54 



37.9 



15.9 



15.1 



13.0 



10.3 



7.8 



Nov. 1-15 . . 



56.2 



72.5 



38.8 



32.8 



21.9 



12.7 



14.7 



10.6 



7 2 



Nov. 16-30.. 



48.2 



60.4 



36.2 



31.3 



15.8 



15.0 



14.8 



12.8 



10.3 



Dec. 1-15 .. 



35.0 



41.9 



26.4 



33.9 



32.7 



18.7 



7.3 



4.2 



3.2 



Dec. 16-31.. 



44.6 



52.7 



11.4 



38.5 



29.2 



9.3 



12.1 



9.5 



1.4 



1896. 





















Jan. 1-15 



36.2 



57.8 



15.2 



31.7 



35.8 



19.9 



4.8 



4.2 



3.6 



Jan. 16-31 . . 



17.3 



20.3 



10.8 



41.0 



25.4 



19.1 



6.4 



4.7 



3.4 



Feb. 1-14 .. 



19.6 



29.6 



13.3 



26.9 



24.2 



12.7 



10.7 



10.6 



14.9 



Feb. 15-29 . . 



27.0 







37.6 



21.2 



15.3 



7.0 



14.1 



4.7 



Mch. 1-15 









Mch. 16-31.. 



1.3.5 



27.3 



6.9 



32. i 



14.1 



34.9 



io.i 



4.7 



3.8 



