12 THE YOUNG 
removed. Just below the hole make an 
incision, c, so that it will hold a thin glass 
cover, d, at an angle of 45°. I use a cover 
I of an inch in diameter. 
Fig. 1. Fig. 2. 
CHEAP CAMERA LUCIDA. 
The '* reflector" can be easily removed 
when not in use, and the glass readily 
taken out to be cleaned. Fig. 2 is a side 
view. 
The Young Scientist for 1880. 
IN commencing a new year it may not be 
out of place to give our readers a few 
hints in regard to the articles we have in 
store for them. In addition to the series 
which have already been commenced, 
such as Mr. Hodgson's articles on Scroll 
Sawing, the articles on the Battery, on 
Home-made Telescopes and Microscopes, 
Magic, Drawing, etc., we have a series on 
the Turning Lathe, by tlr. Harrison 
(author of a well-known work on small 
tools) ; another on Home-made Magic 
Lanterns, one on Amateur Silk Culture, 
etc. Considerable attention will be given 
to Amateur Microscopy. 
The articles by Mr. Wright, on Astron- 
omy, will be continued during the year, 
and he has promised us a series of Notes 
on the Moon. These cannot fail to prove 
deeply interesting, especially to begin- 
ners in astronomy. With the March 
number we will send out a fine Map of 
the Moon, twelve inches in diameter, re- 
produced from Beer & Maedler's " Mappa 
Selenographica. " This will illustrate 
Prof. Wright's articles, and to those in- 
terested in astronomy will be worth more 
than the price of the Young Scientist for 
one year. 
SCIENTIST. 
We ask our readers to do all they can to 
increase our circulation and help forward 
the good work. Kemember that the Young 
Scientist is the only journal of the kind 
in the world. Several very earnest at- 
tempts have been made to start journals 
of a similar character, but they have all, 
without exception, failed. The Young 
Scientist is the only one that survives. 
Story papers have sprung up by the dozen, 
and they flourish amazingly, and some of 
those recently started make a great flour- 
ish of trumpets about occupying the field 
we have taken up. It still remains a fact, 
however, that the Young Scientist is the 
only journal which is strictly devoted to 
experimental science and amateur arts. 
We do not ask any one to help us with- 
out an equivalent, but if you think that 
the Young Scientist deserves support, 
send in your own subscription and get up 
a club amongst your friends. 

To Our Subscribers. 
WE send this number to all whose names 
are on our books — whether paid or 
unpaid. As the subscription to the Young 
Scientist is too small to allow us to incur 
the expense of postage and letter-writing 
for the collection of old accounts, the 
journal cannot be sent after this date to 
those who have not renewed their sub- 
subscriptions^ 
Designs for Scroll-Sawyers. 
ME. HODGSON, whose admirable arti- 
cles on scroll-sawing are now in course 
of publication in the Young Scientist, has 
prepared for us a series of seventeen designs 
covering a great variety of. subjects suit- 
able for Christmas presents and ordinary 
articles of household ornament and util- 
ity. These designs we have had photo- 
lithographed and printed on two large 
sheets. They are full size and embrace 
over eighty different pieces. Knowing 
that this set must have a large sale, we 
have placed the price at 25 cents for the 
set, or a cent and a half for each design. 
We know of no designs equal to these 
which can be had for less than five, ten, or 
twenty cents each. 
To any boy or girl who will send us a 
new subscriber, (together with their own 
