INFLUENCE OF WEATHER ON ACIDS IN RAINFALL. 93 



Removal of the Sample. 



At nine o'clock each morning the rain-water (if any) in the receiver should 

 be mixed thoroughly by swirling. A sample bottle should then be filled to 

 ■within one-half inch of the stopper. The remainder of the water maj now be 

 emptied out or, if the amount is large, it may be stored for rinsing purposes. 

 If there is not sufficient rain-water in the receiver to fill the sample bottle send 

 the whole of it. The label on the bottle should now be marked for identifica- 

 tion purposes with : 



1. The name of the observing station; 



2. The date; 



3. The rainfall, as measured in the official rain-gauge. 



In replacing the stopper of the sample bottle impart to it a screwing motion, 

 with a slight pressure inwards, until it grips firmly. This will prevent leakage 

 during transit. 



Recording. 

 On each day when rain has fallen observations of the weather conditions 

 iluring the jnevious twenty-four hours shoiild be recorded on one of the forms 

 provided for this purpose. At the end of the month the form should be for- 

 warded to the Hon. Secretary of the Committee. When no rain has occurred 

 during any month the form should be marked ' No rainfall recorded ' and be 

 forwarded as usual. Observers are invited by the Committee to note and place 

 on record any special features of the weather immediately preceding or 

 accompanying falls of rain. When compared with the composition of the rain- 

 water these observations may lead to important conclusions. 



Packing and Forwarding. 

 The bottle containing the sample should be replaced in its box, a printed 

 return tag attached, and the package posted at the first opportunity- Each 

 forwarding tag should be marked with : 



1. The name of the collecting station ; 



2. The date of posting. 



Should six samples have accumulated before the departure of the next mail they 

 may be placed together in a large box and sent as a single package. The 

 Committee is indebted to the Commonwealth Meteorologist for arranging to 

 have all postal charges in connection with this research paid at Melbourne. 



Na})ies and Addresses of the Observers who are co-operating with the 

 Research Committee of the British Association engaged in investigating the 

 Influence of Weather Conditions upon the Amounts of Nitrogen Acids in Rain- 

 water in Australia: 



Queensland. 



W. M. Lee Bryce, Esq., The Residency, Thursday Island, 



F. Fairley, Esq., M.I.E.E., F.R.M.S., Woombye. 



Dr. Henry Priestley, Australian Institute of Tropical Medicine, Towns- 

 ville. 

 New South Wales. 



R. Gordon Edgell, Esq., Bradwardine, Bathurst. 

 Victcr'd. 



Miss Jean Heinrichsen, Ballarat. 



S. Hebbard, Esq., Technical School, Sale. 

 Tasmania. 



Athol H. Bisdee, Esq., Wihareja, Steppes. 

 South Australia. 



E. J. Cook, Esq., P.M. Hergott Springs. 



Simon Ockley, Esq., Comaun, Penola. 

 Western Anstrnlia. 



W. A. Doran, Esq., P.M, Eucla. 



G. R. Kirkbv. Esq., P.M. Carnarvon. 

 Major G. T.' Wood, The Residency, Broome. 

 G. G. Lavater, Esq., A.R.V.I.A., Narrogin. 



Northern Territory. 



Dr. !Mapleston, Darwin. 



J. McKay, Esq., P.M. Alice Springs. 



