84 
THE YOUNG SCIENTIST. 
on, overlapping them so as to conceal the stitches, 
and varnish. I think bright bits of wool, or small 
beads, very small leaves, sprigs of moss tacked 
about in the interstices, improves them, and make 
them resemble shell-work more. Those who live 
in the country can easily procure the lichens from 
old logs, stumps and rails. They should be gath- 
ered before very cold weather, as I think they are 
injured by it." 
AVhat will the Weather Be 1— The agricul- 
tural editor of the New York " Sun " has carefully 
tested the so-called "Signal Service Barome- 
ters," and the following is the result at which he 
arrives: "The so-called 'storm glasses,' usually 
made of a solution of gum camphor in pure spirits, 
are really of no value whatever in indicating the 
weather in advance. We have one of the best in 
the market, and, after watching it closely for the 
past year, have come to the conclusion that it is 
utterly worthless for the purpose intended." 
Inquiries. 
22. Will you please tell me how to burn iron or 
platina wire so that it will light gas ? ** 
23. Please publish a recipe for mending common 
white tableware. I have tried gum shellac, but it 
does not answer the purpose; it was the only kind 
of shellac I could obtain, and I tried it according to 
your directions in your article on cements. 
J. G. J. 
24. In your April number, you told how to make 
a lamp out of an ink bottle. Will you tell me what 
oil to use. I tried it with alcohol, and it burned 
very well. 
25 What are the chemicals used in preserving 
flowers? E.vonA. 
26. Will some one please tell me how to make 
cloth waterproof, so that I can use it for a canvas 
boat, and still be pliable, so I can take it off and 
roll it up. 000. 
27. What is the simplest method of making a 
cheap electrical machine that will charge a Leyden 
jar? 
28. Will some reader give a cheap and easily 
applied silver-plating fluid ? F. L. T. 
EXCHANGES. 
In this column yearly subscribers who may wish 
to exdtange tools, apparatus, books, or the pro- 
ducts of their skill, can state what they have to 
offer and what they want, without charge. Buymg 
and selling must, of course, be earned on m the 
advertising columns. 
Wanted, telegraphic and mathematical instru- 
ments; Pitman's Phonography in exchange ; also 
thorough instruction in same by mail. F. S. P., 
King's River, Fresno County, Cal. 
Cigar machine to exchange for bracket saw or 
good microscope. Leonard Alexander, Lmneus, Me. 
Wanted, microscope, or scientific and mechanical 
books and apparatus, in exchange for printing 
Sress, cost $21, with or without type and material. 
. P. Burbank, Salem, Mass. 
Wanted, microscope ; new Tillotson relay and 
part cash given in exchange. W. 0. F., 83 Down- 
ing street, Brooklyn. 
To exchange, a Kidder electric battery, for a pri- 
vate line telegraph instrument. Charles L. Feld- 
kamp, 200 W. Randolph street, Chicago, Ills. 
Wanted, complete Lester combination scroll saw 
in good condition; books in exchange. J.T.Jack- 
son, Box 48, Metuchen, N. J. 
First-class scroll saw, double treadle, all improve- 
ments, worth $40, for second-hand Tolles' objec- 
tive, not higher than 1-5. John D. White, Chieo- 
pee, Mass. 
Camera for taking portraits wanted; state what 
is wanted in exchange. J. F. H., care o: this jour- 
nal. 
Wanted, second-hand dictionary, and book on 
shorthand; state what is wanted in exchange. P. 
J. Murry, Box 783, Wilkes Barre, Pa. 
Wanted, spring motor to run four sewing ma- 
chines. Barton A. Whitsett, Box 115, Lebanon,, 
Ind. 
Gold watch (cost $150) in exchange for a good 
microscope. E. W., Box 4875, New York. 
A work on painting and wood finishing, value 
$1.50, to exchange for scroll saw patterns. R. F. 
Hanscam, North Barnstead, N. H. 
A good telegraph instmmeat, cost $7 50, for a 
couple of good books on chemistry, electricity, etc. 
H. B. Kinney, Hamlin, Brown County, Kansas. 
A large number of minerals and fossils for ex- 
change. Persons wishing to exchange please send 
list to W. H. Hughes, 47 Jeff. Avenue, Grand Rap- 
ids, Mich. 
Wanted in exchange for a second-hand scroll 
saw, treadle power and wooden frame, a good Ex- 
celsior microscope, or live box. Jos. G. Thorp, 54 
West Seventeenth street, New York. 
A set of chemicals and apparatus; also a set of 
wood engraver's tools, glass and instruction book, 
to exchange for a scroll saw and a microscope. The 
chemicals and tools cost nearly $40; will give a good 
trade. F. H. Jackson, Angehca, N. Y. 
To exchange, a Pope's air pistol for a set of carv- 
ing tools. L. Y. R. G., Box 317, Brookfield, Mass. 
Wanted, a small turning lathe in exchange for a 
pair of telephones. J. C, care Young Scientist. 
Scroll saw wanted in exchange for handsome 
portfolio of six water color sketches. Address 
F. S., care Box 4875, New York. 
Specimens of the marbles, granites and minerals 
of Vermont, in exchange for Western minerals, or 
good fossils; minerals and fossil woods from the far 
West specially desired. Dr. H. A. Cutting, State 
Geologist, Lunenburgh, Essex County, Vt. 
Thorough and practical instruction in shorthand 
will be given in exchange for a microscope, with or 
without accessories, worth from $5 to $10. Address 
T. P. Wendover, 68 Christopher street. New York. 
Wanted, a small turning lathe, about IJ inch 
swing, and 12-inch bed; must be well made; "books 
and apparatus in exchange. R. M., care of this 
journal. 
Wanted, a copy of Holtzapfel's " Mechanical 
Manipulation." State what is wanted in exchange. 
E. W., Box 4875, New York. 
