432 METEOKOLOGICAL REPORT, 1869, 



15. — Ammonical salts increase in the rain as towns increase. 

 They come partly from coal and partly from albuminoid sub- 

 stances or protein decomposed. 



16. — The albuminoid substances may be found in the rain 

 even by the rude experiment of burning the residue, which 

 renders unmistakable their peculiar odour, but they may also be 

 recognized by the method used by Wanklyn for potable water. 



17. — ^Experiments in the direction here indicated may enable 

 us to study and express in distinct language the character of a 

 climate, and certainly the influences of cities on the atmosphere. 



RAIN.— HYDROCHLORIC ACID. 



Relation to the average of that from Row, Dumbartonshire, 

 taken as 100. 



Row, Dumbartonshire 100-00 1 



Birkenhead 461-87 4i 



Near an Alkali Work 495-83 5 



Whiston, near Liverpool (from 



covered tank) 512-24 5 



Newcastle-on-Tyne 1158-77 Hi 



Manchester 1438-00 14i 



Liverpool 1684-80 17 



Waterloo, ditto 5214-30 52 



RAIN.— SULPHURIC ACID. 

 Relation to that from Row, Dumbartonshire, taken as 100. 



Row, Dumbartonshire 100-00 1 



Waterloo, Liverpool 229-34 2^ 



Whiston, ditto 398-28 4 



Birkenhead 464-47 4i 



Liverpool 706-02 7 



Newcastle-on-Tyne 891-43 9 



Manchester 973-00 9f 



Near an Alkali Work 1470-00 U-^- 



