34 THE YOUNG 
would be very pretty ; but as one room is 
to be used for dolly's servant, it must 
have something not quite so delicate, and 
red would be too flaring. We must have 
all things to harmonize to make our un- 
dertaking successful as a work of art and 
good taste. The selecting of colors and 
combining them gracefully together is a 
work of art in itself. Can't you suggest 
some other color beside red or pink that 
would combine well with the drab ground 
of your carpet ? " 
Jessie could think of no other color, 
so Mrs. Carpenter proposed crimson or 
wine color." 
*'Oh, I think crimson would be lovely," 
said Jessie. 
" Well, then, we will use crimson, and 
after we have made all the carpets, we 
will upholster the furniture for this room 
first," responded Mrs. Carpenter. 
Mr. Carpenter. Fred, and Ellwood 
coming in just then, put a stop to more 
sewing, as they all agreed to stop at the 
same time. 
After the boys had told their mamma 
and Jessie how much work they had ac- 
comi:>lished, with many expressions about 
squaring, gauging, beveling and dove- 
tailing, which Mrs. Carpenter or Jessie 
did not pretend to understand, Jessie 
produced her carpet; it was pronounced 
by all to be the very ideal of a carpet. 
Jessie made some inquiries about the 
cornices that Fred was going to make for 
her, and then retired to dream of dolls*' 
houses, carpets, and crimson furniture. 
On the following night the two boys, 
aided by their father, and closely watched 
toy Jessie, began to put the house to- 
j?ether, which was found, after all, to be 
not very much of a job. The sides, floors, 
and back were all nailed in position, but. 
Indeed, at this stage, the structure had 
tout a slight resemblance to a house. 
The next thing to be done was to 
put a roof on, and to accomplish this 
a bevel was necessary; but, as usual, 
Mr, Carpenter had provided for this 
emergency by purchasing one the day 
previous. Fig. 23 shows what it is like. 
The slot in the blade is to permit of the 
tolade to be lengthened or shortened at 
will. When adjusted to any required 
SCIENTIST. 
bevel, the thumb screw can be turned 
tight, which will hold the blade where 
placed until the work is done. 
Fig. 23. 
Fig. 24 shows a "try-square," two of 
which Mr. Carpenter bought when he 
N 
Fig. 24. 
purchased the bevel. One had a blade 
six inches long, and the other ten. The 
stock, N, is made of rosewood or some 
other equally hard substance. There will 
be ample opportunity yet to show the 
uses of these tools and many others. 
(To he continued.) 

Management of the Aquarium. 
FROGS, TOADS, NEWTS, ETC. 
FEOGS, toads, newts and salamanders 
differ entirely in their habits from the 
turtles, in their being at no period of their 
existence aquatic, and at other times semi- 
aquatic, or living part of the time on land 
and part in water. I can select no better 
account of the changes they undergo than 
that given by Professor Quatrefages : 
"The development of frogs presents 
another curious phenomenon ; it is this : 
The young of the animal, after it has left 
the egg, and before it has become a larva, 
is still in a semi-embryonic condition. At 
this period the digestive tube and its ap- 
pendages are exceedingly rudimentary. 
The greater portion of the body is fille(J 
with a large mass of yolk or vitellus, en- 
