(bovev] presidential ADDRESS 9 



An Exliibition admitted by its numerous visitors to be the most interesting and 

 attractive of any in this great metropolis. 



In the list of visitors are the illustrious names of several of the Crowned Heads 

 of Europe, and nearly the whole of the Nobility of England. 



" This Exhibition, which has so much excited public attention of late, is well 

 worthy a visit from all who love to see the wonders of science." — (Morning Post ) 



The Electrical Telegraph is unlimited in the nature and extent of its communi- 

 cations. By its extraordinary agency a person in London could converse with 

 another at New York, or at any other place however distant, as easily and nearly 

 as rapidly, as if both parties were in the same room. Questions proposed by 

 visitors will be asked by means of this apparatus, and answers thereto will be 

 instantaneously returned by a person 20 miles off, who will also, at their request, 

 ring a bell or lire a cannon in an incredibly short space of time, after the signal for 

 his doing so has been given. 



The electric fluid travels at the rate of 280,000 miles per second. 



By its powerful agency murderers have been apprehended (as in the late case of 

 Tawell) ; thieves detected ; and lately, which is of no little importance, the timely 

 a.ssistance of medical aid has been procui-ed in cases which otherwise would have 

 proved fatal. 



The great national importance of this wonderful invention is so well known 

 that any further allusion here to its merits would be superfluous. 



N.B. — Despatches sent to and fro with the most confiding secrecy. Messengers 

 in constant attendance, so that communications received by telegraph would be 

 forwarded, if required, to any part of London, Windsor, Eton, etc. 



Admission,— One Shilling. 



As soon as the world had grasped the idea of the remarkable results 

 of the electric telegraph, it cannot be wondered at that the attention of 

 scientific men was called to the possibilitj" of applying electricity to the 

 transmission of sound itself. The result, in the evolution of the telephone, 

 is too recent and too well known to require any description. It is evidently 

 so 7nuch better adapted to the wants of city life than is the telegraph, that 

 already the number of telephone messages as compared with telegraphic 

 messages is as ten to one on this continent, where a careful estimate gives 

 the number of 75,000,000 telegrams as compared with 750,000,000 tele- 

 phone messages. 



This electricity, which has effected so enormous a saving of time in 

 the transmission of intelligence, as already indicated, has been still further 

 utilized in this direction b}' the development of the electric motor. Ten 

 years ago there was no such thing as an electric railway in our cities ; 

 now, we have so many railways that it may soon be a little doubtful 

 whether we have any streets. The importance of the introduction of 

 the electric railway can scarcely be overestimated, as it bids fair to solve 

 some of the terrible problems of over-crowded city populations. 



Not only is the motor valuable as a means of rapid transit, but its use 

 secures great economy in centralizing the production of power. Small 

 stations at many ditterent points may be supplied with power from a 

 wire, and the evils of smoke, soot and dust confined to a single point. 



Already in street railway work the electrical energy utilized amounts 

 to no less than one and a half million H. P., while the total dynamo 



