98 
THE YOUNG SCIENTIST. 
Colors Tor di'apery are: Buff, Naple.s yelJf)w; 
orange, cliromo y(3llo\v ci,nd a little scarlet lake 
mixed; white, silver wliite ; blue, white and Per- 
sian blue mixed; f^reen, ciirome yellow and Per- 
sian blue mixed; purple, scarlet lake and Prus- 
sian blue. 
For jewelry use yellow ochre; for silver and 
pearls, silver white. 
For trunks and branches of trees, Vandyke 
brown, raw sienna and silver white mixed: foli- 
age, mix chrome yellow and Prussian blue, and 
vary with the browns: for earth, raw sienna and 
white mixed ; rocks. Vandyke brown, white and 
raw sienna mixed; water, Prussian blue, white 
and a small quantity of Kreen; distant liills, 
nifike it a little deeper blue: the sky, Prussian 
blue and white, applied as follows: First paint the 
portion next to the tops of the hills, trees, etc., 
with entire white; then mix a ^'pry small quantity 
of Prussian blue as you go upwards on tlie pic- 
ture. If you wish a warm appearance on the 
horizon, mix a small quantity of scarlet lake to 
give it a red tinge. Colors generally used for 
backgrounds are Vandyke brown, raw sienna 
and white, varied light or dark with more or less 
white mixed with it; or backgrounds c.ui be 
painted after the rest is done by mixing all the 
different sorts together that are left. 
If you make a false stroke you can remove the 
paint with a rag dipped in turpentine. The 
brushes may also be cleaned in the same way. 
To make a transparency for ha,nging in the 
window after you have made the picture trans- 
parent according to the directions given above, 
place a second glass on the back, bind the edges 
with a thin paper, and when dry paste over this 
strips of bookbinders' cloth. When you put this 
on, paste along the sides a piece of narrow ribbon 
or tape, allowing it to project out over the two 
upper. corntu'S in the form of two short loops 
through which a cord can be passed to hang it up 
by, Pictm-es for transparencies cannot be 
painted, but a colored engraving can be used.— 
A, B. 
30, H.,N. Y., sends the following: " Is the answer 
to E. G. (2). February number, concerning ' The 
Swiss Family Eobinson.' wherein it Avas stated 
that the book was written by J. H. Kampe, cor- 
rect ? Now, in a French edition in my possession 
the author is said to be John Eudolph Wyss, 
born at Berne. March 13. 1781; died at, Berne, 
IMarch 31, 18.30. His father had planned the work, 
but John Eudolph Wyss wrote it. AVho is cor- 
rect. S. K, or I ?" 
Note.— Formerly there was some do\il)t as to 
the authorship of this fascinating work, and it 
was ascribed to a number of sources ; it has been 
ascertained latterly, however, beyond doubt, that 
the book is the work of Kampe, Humboldt's tu- 
tor. Miss Yonge, who is an excellent authority 
on the subject, says: "No one but a German 
could have thought it practicable to land a whole 
family in a row of w^a.shing-tubs nailed together 
between planks, on a desert island." The work 
w^as doubtless suggested by De Foe's "Eobinson 
Crusoe." The two monograms you send us in re- 
ply to J. H. P. and T. W. T. (query 23), arrived too 
late to get the cuts made early enough for the 
present issue. They will appear in our April 
number. 
Queries. 
31. J. S., Somerville. N. J.— If you drop a postal- 
card to Peck & Snvder. 126-130 Nassau St.. New 
York City, they will send you a catalogue con- 
taining all the information you ask for concern- 
ing ice and roller-skates. 
32. Monoge.IlMS.— G. F. M.. A. B., and G. S.. ask 
for monograms of those initials, and request 
some of our competent readers to forward de- 
signs to this office for publication. 
33. Inlaid Monogram.— E. B, desires a mono- 
gram of his initials for inlay, to be cut Avith an 
ordinary Challenge scroll-saw. The work is in- 
tended for the top of a glove-box, and the design 
would be preferred on an oblong or oval back- 
ground. "Please state, also, the kinds of wood 
that would be the most suitable for designs sent." 
-E. B., Atlanta, Ga, 
34. Overlay Designs.— If not asking too much 
of you, I should feel under obligations if you 
would publish a few designs for overlay fret- 
work, suitable for the panels of a wardrobe or 
cliiffoniere. Perhaps some brother subscriber 
would kindly contribute such designs as I re- 
quire.— Egbert H., Erie, Pa. 
35. Katy v. desires to know (1st) What is meant 
by the language of colors? (2d) When did type- 
writing machines first come into vogue, and 
what they are like ?— Louisville, Ky. 
36. Painting on Satin.— Will you kindly inform 
me how this kind of work is done, and name the 
materials employed ?— A Country Girl. 
37. Eevenue Marine Service.— What require- 
ments and qualihcations are necessary to obtain 
an appointment in this service ?— Harry S.. 
Phila, Pa. 
38. M. H., Homestead, la.— Will you please in- 
form me where I ca.n purchase the shells for or- 
namental shell-work quoted in your market re- 
ports ? 
Note.— Several inquiries of tliis kind have 
reached us of late, and we have been obliged to 
give the answers by mail. Hereafter Ave hope to 
be able to give our readers much of this sort of 
information through our advertising columns. 
It will always give us pleasure to reply by mail or 
otherAvise to all inquiries of this kind, and we 
hope our readers Avill note this fact and AA^-ite us; 
freelv for any information Ave may be able to af- 
ford. 
33. J. A., Colela, la.— Will some reader informi 
mo how many bones there are in the human 
body ? There appea.rs to be a difference on the 
subject among reputed authorities. One says, 
there a,re 204, aiTother 246, and still another 260. 
and in a recent newspaper article I notice the 
number is placed at 202. Noav Avhich is right, or 
are any of the foregoing figures right? 
40. QuiNER.— As myself and others are interest- 
ed in the art of pottery, a fcAV practical hints on 
glazing, pi-epa.ring clay, etc., in the Young Sci- 
entist, AA'ould be duly appreciated. 
Retail Prices. 
IMPOR l'ED CAGE BIRDS. 
Canaries, Belgiafi, per pair $6.oo to 15.00 
" French, each 6.00 to 15.00 
Gervian, Hartz Mts., each 2.50 to jci-oo- 
Gold Finches, each 1.50 
Gold Fine h (mules), each 2. 50 to 5.00- 
Bull Finches, each 2.50 
Bull Finches (tuned), each 10.00 to 40.00 
African Finches, per pair 2.50 to 5.00 
Chaf Finches, each 1.50 
Linnets, each 1.5010 2.00 
Linnets (mules), each 2.50 to 5.6o. 
Green Linnets, each 1.50 
Java Sparrow (blue), each 1.50 
Java Sparrows (white), per pair 4.0010 6.00 
English Sparro\\'s, per pair 1.00 
