GruBpsp—Oontrol of Public and other Clocks. 49 
As to the best arrangement of correcting apparatus to attach 
to our clocks. Once we have the relay in our houses worked by 
the electrical wave, we can use it (the relay) to work any kind of 
apparatus we choose. I would prefer for all commercial and social 
purposes that only one wave be sent per hour, and that the cor- 
recting apparatus be of the simplest possible form such as described 
in my Paper read last November. 
It will be observed that, in this arrangement,! even if a current 
fails for one hour, the only fault will be an error in the clock for 
the succeeding hour, but the next wave that comes wipes this out, 
and there can be no cumulative error. 
I think it will be evident to anyone who has followed my 
remarks that the system of synchronizing clocks by the “Marconi’”’ 
wave is a perfectly practicable one. 
For convenience of exhibition we have necessarily had to place 
the distributing arrangement and the receivers within the same 
building, but it will be easily understood that the same influence 
which has been so successfully working this Morse pen, and send- 
ing messages through it every day, for months past, eighteen miles 
across the sea, from Alum Bay to Bournemouth, is quite capable 
of working this other equally simple apparatus for synchronizing 
clocks, and that, in fact, if the clocks in Bournemouth were supplied 
with the necessary receiving apparatus, they could all be checked, 
and kept to correct time by a standard clock in the Isle of Wight. 
It will be observed that in the course of my remarks I have 
spoken only of the “Marconi” system of Wireless Telegraphy. 
It may be asked whether this is the only system available. I 
have had no experience whatever with any other form of wireless 
telegraphy. It may be found possible to work with some other, 
but I have confined my, remarks to the “ Marconi” system 
because, as I have said before, while other systems can hardly be 
said to have emerged from the experimental stage, the “‘ Marconi” 
system of wireless telegraphy is an accomplished fact. 
1 A practical illustration was here given of the proposed arrangement. 
SCIEN. PROC. R.D.S., VOL. IX., PART I. E 
