15 



The following is the list of illustrations to the Lecture : — 

 Bach : Prelude and fugue, in E (from the " Wohltemperirte Clavier "). 

 Handei. : Air an<l variations (fi-om Suite, in E) known as " The Harmonious 



Blacksmith." 

 MozAKT : Rondo in D (from Sonata in the same key). 

 Beethoven : Thirty-two Variations on a theme in C minor. 

 Schubert : Impnimptu, in G, op. 90, No. -3. 

 Weber : Aufforderung zum Tanz, in D flat, op. 6.5. 



( Andante and Allegro, A minor. 

 Mendelssohn : Three Fantasias : op. 16-! Cappricin, E minor. 



(The Rivulet, E major. 

 ( Intermezzo (E flat minor) and Scherzino (B flat major) from 

 Schumann:- " A Carnival's Jest in Vienna," op. 26. 



(^ Novelette in E major, op. 21, No. 7. 



f, i Nocturne, in B, op. 32, No. 1. 



V.HOPIN : ^ y^j^g^ j^ ^ g^^^ ^p ^2 



T <?7T • i Study : Waldesrauschen (Forest Murmurs), 

 ' I March from Wagner's " Tannhiiuser " arr. 



The gran(^ Pianoforte used on the occasion was kindly lent to 



the Association by Messrs. Broadwood. 



TUESDAY, APKIL 1st. 



Professor Armstrong, Ph.D., F.K.S., Sec. C.S., read a paper 

 on " Our Local "Water Supply." 



"Water, as defined by the chemist, is a compound, in certain 

 definite unalterable proportions, of the two elements oxygen and 

 hydrogen. As thus defined, water is unknown in Nature : even 

 the purest rain-water containing the gases of the air in solution, 

 and that falling in or near to towns is more or less largely charged 

 with products of combustion and decay, &c., not to mention 

 mechanical impurities such as soot, dust, and even living organisms 

 which it scrubs out of the atmosphere on its way to earth. River 

 and well-waters also contain in solution varioiis solid matters 

 derived from the soil and rocks over or through which the water 

 has passed on its way to river or spring, the character and amount 

 of such dissolved matter being necessarily subject to considerable 

 variation. 



The foreign matters naturally present in waters, except in 

 rare cases, as, for exami>le, in the neighbourhood of copper and 

 lead mines, are of a harmless kind. Whenever a water which is 

 normally fit for use becomes contaminated with harmful im- 



