xliv. ABSTRACT OF PROCEEDINGS. 
detail with the structure and parts of the bell and battery, 
and gave the conditions that make for good and efficient 
service. 
The zinc should be of drawn, not cast rod, and should be 
amalgamated. The manganese in the Lelanché cell should 
be native pyrolusite, and while ammonium chloride is best 
it could be substituted by sodium chloride. To prevent 
the evaporation of the ammonium chloride solution, it is 
desirable to cover the liquid with a mixture of resin 1 part, 
Venetian turpentine 1 part, and paraffin 2 parts. This 
has a melting point of 60° C. Good bells, made of 26 silk 
covered wire, and having platinum points of contact, should 
be used, and the connecting wires (20 for household use), 
should be stapled singly. Old Lelanché cells could be 
revivified by immersion in moderately strong hydrochloric ° 
acid, and used up dry cells, could, after puncturing the 
zinc casing, be utilised as Lelanché cells by immersing in 
dilute ammonium chloride. Questions were asked by 
Messrs. F. W. STEEL, R. W. CHALLINOR and the Hon. Sec. 
Mr. A. B. Hector gavea lecture upon ‘*‘ Business Reson- 
ance or Live Wires and Wireless.’’ Beginning with the 
statement that business is everyone’s avocation, the lec- 
turer proceeded to deal with resonance, demonstrating the 
absorption and emission of sounds of the same pitch by 
tuning forks. The structure of the ear followed, and 
emphasis was laid upon the hairs of Corti which, like a row 
of tuning forks, took up the vibrations transmitted to the 
lymph by way of the bones from the drum of the ear. The 
mechanism of receiving and transmitting the sounds to the 
brain is similar in some respects to the Marconi system of 
wireless telegraphy, which was described. Resonance is 
the basis of wireless and business. The business man must 
become attuned with his customers, and the best way of 
getting in tune is to sell good articles. He should endeavour 
