XX. 



THE FLORA OF HALIFAX. 



Average Rainfall in Halifax. 



As elsewhere, the prevailing winds throughout the year come 

 from the south-west and west ; but the smaller rainfall of April 

 and May is caused by the prevalence of north-east and east 

 winds. This is especially the case in May, which is the only 

 month when the wind is more frequently in the east than in 

 the west, hence the vegetation is frequently retarded and the 

 foliage liable to be damaged. 



Annual Rainfall on Halifax Moors. 



Turning to the rainfall in the parish generally, the rain 

 gauges maintained on the gathering grounds of the reservoirs 

 of the Halifax Corporation present a fairly complete summary 

 of the conditions in the northern half of the parish. The 

 average amount collected in the highest four gauges in the last 



