24 



about 50 feet above the sea level, vras 32.96 inches, while at 

 A crise, 484 feet above the sea, it was 47.31 inches. Again, in 

 1878, at Milton, the rainfall was 29.845, and at Acrise 40.68 

 inches. The rainfall at Milton Chapel and at Canterbury was 

 almost exactly alike for both 1877 and 1878. 



I wiU now mention a few points concerning the analyses of a 

 few samples of water in this chalk district to show how closely 

 they resemble one another, and also how the amounts of the 

 different substances held in solution may vary when the waters 

 become defiled from any cause. 



1. Canterbury "Water Works water straight from the well : — 

 Total solids, 23,92 grains per gallon, containing 15,96 grains of 

 chalk, 1,34 grains of nitric acid, and 1,47 chlorine ; free ammonia, 

 01 parts per million, or one part in 100 millions ; albuminoid 

 ammonia, .016 parts per million or about 1^^ in 100 millions ; ni- 

 trites, absent. 



2. Naylebourne water taken at a strong spring : — Total solids, 

 22 gi-ains per gallon, containing 14,42 grains chalk, 1.25 grains 

 nitric acid, and 1,24 grains chlorine; free ammonia, .01 parts 

 per million ; albuminoid ammonia, .03 per million ; nitrites, ab- 

 sent. 



3. From a well in the meadow, about a mile from Petham, 

 and away from houses : — Total solids, 21.35 grains per gallon ; 

 chlorine, 1.24 ; free ammonia, .04 parts per million ; albuminoid 

 ammonia, .07 parts per million ; nitrites, absent. 



All those waters are very pure ; it will be noticed how closely 

 they resemble one another. 



4. From a well close to a farm house at Petham : — Total solids, 

 29.4 grains per gallon; chlorine, 1.74 grains : free ammonia, 

 .04 parts per million ; albuminoid ammonia, .08 parts j)er 

 million ; traces of nitrites 



The presence of the farm yard, it will be noticed, has raised all 

 the items, but still it may be classed as a wholesome water. 



5. From a well in the middle of the village : — Total solids, 

 22.4 ; chlorine, 1 57 ; free ammonia, .05; albuminoid ammonia, .17. 



Here the albuminoid ammonia is much too high ; the free am- 

 monia and chlorine arc also rather high. 



6. Another well at Petham with a pump : — Total solids, 24.5 ; 

 chlorine, 1.33 ; free ammonia, .03 ; albuminoid ammonia, .04. 



Also a very good water. 



While the Nailbourne is running, from the above analyses it 

 seems that Petham is abundantly supplied with pure water. I 

 expect that the large quantity of water in the soil thoroughly 

 cleanses all the wells. It would be interesting to know the com- 

 position of some of the village well waters soon after the heavy 

 rains set in after a long drought. 



Now a few words as to what may be learned from a water 



