THE WEATHER, INFLUENZA, AND DISEASE. 



593 



The preceding table (Table V.) gives the figures for the different epidemic periods, 

 and for the weeks immediately preceding and following them. A glance at the table 

 shows that the conditions were very variable in many respects, regular in others. The 

 most constant condition was the decreased rainfall at the time when the disease was 

 becoming epidemic. Another point that may be noted was the prevalence of anti- 

 cyclonic weather at that time. The outbreaks of 1889-90 and of 1893-94 continued 

 during wet weather ; in the four other epidemics the rainfall during the continuance of 

 the attack was very small. 



Reference to the next table (Table VI.) makes several of these points much clearer. 

 In this table the six weeks before each epidemic are considered together, and the same 

 is done with the other different periods during and after the attacks. The mean for the 

 same weeks for the seven years has also been worked out, and placed alongside the 

 other figures for reference. The first thing which will attract attention is great 

 disproportion between the number of weeks before the epidemics in which the type of 

 weather was cyclonic to those in which the type was anticy clonic, — cyclonic 31, 

 an ticy clonic 5, in the thirty-six weeks. The mean for these weeks in the seven years 

 was 26 to 10. The temperature for the preceding periods of six weeks was lower 



Table VI. — Meteorological Conditions prevailing during the 

 Total Epidemic Periods. 





Cyclonic. 



Anticyclonic. 



Mean 

 Temperature. 



Mean 

 Kainfall. 



Percentage 

 Sunshine. 



1. The 36 -weeks preceding the six attacks. 

 The 36 weeks, ...... 



Mean for same weeks in 7 years, . 



31 



26 



5 

 10 



41-37 

 43-01 



0-67 

 0-56 



26-3 



2. The first 2 weeks of all the Epidemics. 

 The 12 weeks, ...... 



Mean for same weeks in 7 years, . 



3 

 9 



9 

 3 



40-22 

 41-27 



0-24 

 0-56 



32-5 



3. The 68 weeks of the Epidemics. 

 The 68 weeks, ...... 



Mean for same weeks in 7 years, . 



40 

 40 



28 

 28 



41-21 

 41-31 



0-47 

 0-53 



27-8 



4. The last 1 2 weeks of the Epidemics. 

 The 12 weeks, ...... 



Mean for same weeks in 7 years, . 



7 

 7 



5 

 5 



43-82 

 42-36 



0-61 

 0-53 



28-9 



5. The 24 weeks following the Epidemics. 

 The 24 weeks, . . . .' . 

 Mean for same weeks in 7 years, . 



16 

 14 



8 

 10 



43-28 

 43-08 



0-56 

 0-49 



28-12 



6. The 36 weeks (4 and 5) at close of Epidemics. 

 The 36 weeks, . . . ... 



Mean for same weeks in 7 years, . 



23 

 21 



13 

 15 



43-47 



42-84 



0-58 

 0-5 



27-5 



