160 
THE YOUNG SCIENTIST. 
If at first you don't succeed, try again. It is a 
fun for all sorts of boys. Tliis form of kite is 
sometimes very eccentric, and as game as a 
wily fish. ^ 
Novelties for Amateurs. 
Among tlie new tilings we intend tallying 
about tliis month is the new AVentworth saw- 
clamp, made by the Seneca Falls Manufactur- 
ing Company, Seneca Falls, N. Y. This is an 
excellent device for holding a saw while being 
filed, and is particularly adapted for the use of 
amateurs, as it is simple, durable, and easily 
handled. The saw can be placed in the grips or 
jaws almost instantaneously and as readily re- 
moved, and may be slipped forward or back- 
wards in a moment, at the will of the operator. 
The annexed illustration exhibits the device, 
and will give the reader some idea of the work- 
ing and character of the tool. In the cut the 
saw is shown in position, gripped tight and 
has been partially dried so that it will not run 
into the paper, lay the engraving or show-bill 
face downwards upon the prepared surface, and 
subject it to a slight and uniformly appor- 
tioned pressure for twenty-four hours. Then 
moisten the back of the paper, and by means of 
a soft rubber, rub off the softened paper. If 
this is done with care, the ink lines will remain 
attached to the varnished glass surface. As the 
thin varnish is quite transparent, this is equiva- 
lent to transferring the engraving to the glass 
surface. The transfer is frequently improved in 
appearance by giving the plate (and transfer) a 
second coat of varnish. 
ready for filing. The clamp is attached to the 
side of a work-bench, table, or side of a wall be- 
low a window, by means of strong screws, and 
it may readily be taken away if not convenient 
to leave permanently in position. 
The clamp is worked by means of a cam, to 
which a lever is attached, all of which is shown 
on the lower part of the cut. The cam attach- 
ment is convenient and handy to work, and is 
as efficient as it is simple. 
To Transfer Printed Matter to Glass. 
Flow the glass-plates with a good quality of 
photographers' negative varnish, which should 
be thinned down in the usual way. When this 
— The reappearance of the Star of Bethlehem is 
predicted by astronomers for this year or the 
next. On the 11th of November, 1572, Tycho de 
Brahe discovered a 
star in Cassiopeia 
which equalled Sir- 
ius, and even Ven- 
us, in brightness 
for a month, and 
then fell back into 
its former insignifi- 
cance. Conjecture 
has sought to estab- 
lish a connection 
between this phe- 
nomenon and two 
similar apparitions 
in 1264 and 945. A 
not unnatural infer- 
ence was that the 
same increase in 
volume of this re- 
markable star oc- 
curred before 945, 
which would bring 
us to about 630 and 
310 and to the date 
of the Nativity. 
This star is now again due. 
— Nothing can be worse for a child than to be 
frightened. The effects of the scare it is slow to 
recover from ; they remain (sometimes) until ma- 
turity, as is shown by many instances of morbid 
sensitiveness and excessive nervousness. Not 
unfrequently fear is employed as a means of dis- 
cipline. Children are controlled by being made 
to believe that something terrible will happen to 
them and punished by being shut up in dark 
rooms, or by being put in places they stand in 
dread of. No one without vivid memory of his 
own childhood, can comprehend how entirely 
cruel such things are. We have often heard 
grown persons tell of the suffering they have en- 
dured, as children, under like circumstances, 
and recount the irreparable injury which they 
