HE YOUNG SCIENTIST. 
187 
THE 
Young Scientist. 
A Practical Journal for Amateurs. 
iWitii which are ixiCvorporated "The Technolo- 
gist," "The Industrial Monthly," 
and " Home Akts.") 
PUBLISHED MONTHLY AT FEB YEAR. 
EDITORS. 
JOHN PHIN. 
ERED. T. HODGSON. 
Advertisements.— The Young Scientist has 
found its way into the very best homes, and its 
subscribers are as a g-eneral rule, of the buying 
<3hiss. It therefore oti'ers special inducements to 
tliose wdio liave anything good to offer. 
Rates: 30 cents per line, agate measure. Lib- 
eral discounts on large and continued advertise- 
)nents. No Humbugs, Patent Medicines, or 
Blind " advertisements inserted at any price. 
Published by 
THE INDUSTRIAL PUBLICATION CO., 
29i Broadway, New York. 
Removal. 
E take this opportunity of in- 
forming our friends tliat we 
have removed our editorial and 
business offices to 294 Broadway, New 
Yorli, where we liave secured a suite of 
spacious and pleasant rooms. 
It will give us pleasure to have any of 
our friends call and see us whenever they 
can make it convenient to do so. 
Our printing-office is situated at No. 15 
Dey street, and is therefore some distance 
from our editorial sanctum, which is a 
mucli better arrangement than the for- 
mer one, when the printing, editorial and 
business offices were in one building. 
The increase of our business within the 
last few years has rendered a removal to 
more spacious quarters imperative ; and 
in responding to this requirement we 
have been fortunate in securing the rooms 
we now occupy for a term of years, a con- 
dition that will warrant us in expending 
a reasonable sum in fltting-up our offices 
in a suitable manner, an undertaking 
that would be unwise under a short lease. 
A writer on meciianical subjects advises 
young mechanics to cultivate the nerves 
and muscles of each band, so that they 
can use a liatnmer, chisel, Avrench, file, or 
any other tool, as well with one hand as 
with the other ; so tbat they can turn a 
handle or hand wheel one way with one 
hand, and another one the other way 
with the other hand, both at the same 
time ; or so that they can turn them both 
one way or different ways at different 
speeds. Such practice in turning liandles 
will be found indispensable in learn- 
ing to become an expert on the 
lathe, planer or other machine tool. 
All that is required to learn this is a 
little practice until the motion of one 
limb or member is not at all governed or 
controlled by the motion of another. 
There are many things that may be done 
with one hand as well as the other, but 
there a.re some instances wlien the time 
required to educate one hand to expert- 
uess is as much as the owner can afford. 
Indeed, for some of the finer manual 
operations it requires half a lifetime to 
educate the hand to perform its duties 
satisfactorily; and to accustom both 
hands to perform the same performances 
alike must, as a matter of course, take a 
great deal more time than if one liand 
was prepared to do the same duty. Ambi- 
dexterity for ordinary operations is to be 
desired, but for the finer order of artistic 
and mechanical manipulation, though 
desirable, is not to be souglit after, as the 
pursuit would be simph^ a waste of pre- 
cious time. 
The telephone as yet is only in its in- 
fancy, yet what wonders have already 
been performed with it ! A few weeks ago 
a number of very successful experiments 
were performed in the Postal Telegraph 
Company's office. New York. The tele- 
l)honing was between New York and 
Chicago, and the instrument used was 
the double Edison telephone, which was 
employed four years ago in establishing 
communication betw^een Toledo and Mil- 
waukee by way of Detroit and Chicago, a 
distance of over 500 miles. It consists of 
tw^o Edison telephones attached to a 
single mouthpiece in such a manner that 
