24 
elected secretary, the proposer and seconder eulogising his long 
and valuable services. In returning thanks, Mr. Ullyett alluded to 
one or two incidents connected with the society. The first was 
that it was nineteen years ago that it was originated, and he 
remarked that when it was proposed to establish the museum, 
twelve members of the Town Council voted upon it, six for and six 
against, and it was only carried by the casting vote of the Mayor, 
the late Mr. John Gambrill. The establishment of the museum 
was not the only good object which had been directly accomplished 
ty the Society, but to its exertions was due the existence of the 
public library and reading room, the science and art classes, and 
the new building on the Grace Hill. 
Ferpsruary 157H, 1887. 
The usual meeting was held in the Council Chamber. An 
experimental lecture on the Dynamo was given by Mr. A. H. 
Ullyett, illustrated by the Lantern, and an abundance of experi- 
ments. 
The attendance was large, and the lecture was warmly 
appreciated. é 
THE DYNAMO. 
The Dynamo is quite a modern discovery. At the beginning of 
the present century it never occurred to the scientific men then 
living—amongst whom was Sir H. Davy—that mechanical motion 
could be so used as to produce currents of Electricity. But now, 
since Faraday’s great discovery to which I shall presently refer, 
a tremenduous leap has been made in this branch of the science of 
Electricity. 
According to Professor Thompson, a Dynamo is a machine for 
converting the energy of mechanical motion, into the energy of 
electric currents or vice versa; that is if by the means of a 
machine, or by muscular power motion is produced, and this 
motion sets up electric currents, the machine generating these 
currentsis a Dynamo. Or if, by means of electric currents motion 
is produced in some part of a machine, that machine is a 
Dynamo. 
In this box is a battery capable of giving a strong electric 
current ; if the positive and negative poles be connected with the 
