22Q horticulturist's rule-book. 



B. WHISTLE SIGNALS. 



The warning signal, to attract attention, will be a long blast 

 of from fifteen to twenty seconds' duration. After this warning 

 signal has been sounded, long blasts (of from four to six seconds' 

 duration) refer to weather, and short blasts (of from one to 

 three seconds' duration) refer to temperature ; those for weather 

 to be sounded first. 



Blasts. Indicate. 



One long Fair weather. 



Two long Rain or snow. 



Three long Local rains. 



One short Lower temperature. 



Two short Higher temperature. 



Three short Cold wave. 



Interpretation of combination blasts. 



One long, alone Fair weather, station- 

 ary temperature. 



Two long, alone Rain or snow, station- 

 ary temperature. 



One long and short * . . Fair weather, lower 



temperature. 



Two long and two short Rain or snow, higher 



temperature. 



One long and three short . . . . . Fair weather, cold 



wave. 



Three long and two short Local rains, higher 



temperature. 



By repeating each combination a few times, with an interval 

 of ten seconds between, possibilities of error in reading the 

 forecasts will be avoided, such as may arise from variable winds, 

 or failure to hear the warning signal. 



5. Phenology. 



Phenology (contraction of phenomenology^ is that science 

 which considers the relationship of local climate to the peri- 



