108 
THE YOUNG SCIENTIST. 
I have a Mechanical Telegraph with book of instructions, 
books, etc., which 1 wish to exchange for good microscopical 
objects, mounted on 3x1 slips. Address, with list, J. H. 
Frey, Millersburg, Ohio. 
To exchange, '* How to Use Microscope," Wells' "Na- 
tural Philosophy," and maiiy other books, chemical appa- 
ratus, etc , for good photographic camera, and lenses. W. 
H. Weed, 254 Putnam Ave., Brooklyn, N. Y. 
Wanted "Quimby's New Bee Keeping," for "Our 
Own Birds of the United States," by W. S. Baily new. 
Joseph Anthony, Jr., Colota, Whiteside Co., 111. 
Wanted a good book in anatomy, in exchange for a book 
on chemistry, or for story books. A. G. G., Box 26, 
Summit, New Jersey. 
A German-silver trimmed, patent lined, cocoa flute, cost 
$4, in good order, for good spy-glass, photo-material, or 
ofifers. Ewing McLean, Greencastle, Ind. 
I have some fossil shells from the west bank of the 
Mississippi, to exchange for Indian relics. A. W. S., 187 
E. 71st St., N. Y. 
I have a magic lantern, Ruby pattern, nearly new, and 
5 views; also "Our First Century," bound in leather, cost 
$7; state what is wanted in exchange. I. N. Spencer, 
Box. 217, So. Manchester, Conn. 
First-class telegraph instrument and attachments, and 
"Wood's Botany," for bound volumes of periodicals, books, 
or offers. H. P. Albert, Anderson, Iowa. 
Wanted a book on treatment and care of canary, also 
breeding of same; will give in exchange book named 
"Market Garden, Flower Garden and Bees," or 40 
"Scientific Americans" or "Seaside Libraries;" want 
also old books. M. J. Mulvihill, Norwalk, Conn. 
Coins, minerals, stamps, books, type, fishing tackle 
(very complete) and fish pole, bronze inkstand, etc., for 
coins, medals, stamps, war envelopes, old newspapers, and 
Continental, Colonial and Confederate currency. F. F. 
Fletcher, 103 Main St., St. Johnsburg, Vt. 
Blow-pipe set (cost $10), large illustrated family Bible 
(cost $7.50), for Wood's Botany, Dana's Geology, or 
printing press and type. H. W. Noble, Box 134, South 
Dansville, N. Y. 
Wanted, offers for fossil shells from the west coast of 
Africa. A. W. Seward, 187 E. 71st St. 
I have a number of birds' eggs I should like to trade for 
other birds' eggs ; send for list of trading eggs. A. G. G., 
Box 26, Summit, New Jersey. 
For a microscope stand or offers, a 36-inch turning lathe 
(new) and a number of scientific books > send for list. A. 
Kendall, Somerville, Mass. 
Wanted services of amateur printer with small office (or 
large), in exchange for an interest in a well-established 
weekly paper, good size. Eagle Office, Plymouth, N. H. 
American Agriculturist microscope, new, cost $15, for 
amateur photographic apparatus, lever watch, 22 calibre 
breech-loading sporting rifle or magic lantern of equal value. 
Wm. A. Walker, Rockland, R. I. 
1. T. Bell, FrankHn, Pa., has back numbers of Scientific 
American, Forest and Stream, and Young Scientist, good 
flute, chessmen, books, etc., for good magic lantern, revolver, 
scarce coins, or offers. 
A steel spring bracket-saw, 2 doz. saw blades, and about 
I doz. patterns for a good stylographic pen or offers; send 
postal before exchanging. Geo. Oakley, Rutherford, N. J. 
A rosewood banjo, 11 inch head, 12 nuts, fully strung, 
together with lot of dime banjo music and instructions, for 
microscope, Webster's Unabridged, monkey, squirrel and 
cage, or offers. J. DeWitt Clark, P. O. Box 37, Brooklyn, 
N. Y. 
For self-inking printing press and type, one Henry rifle, 
16 shot, 44 cal., cost $40, in good order, or one double barrel 
shot gun, barrels London fine twist, or offers. J. B. Garri- 
son, Belton, Bell Co., Texas. 
What offers for "The Chefs D'Oeuvre D'Art, Paris Ex- 
hibition 1878," cost $16, good as new. bound; 1 l.irge 
photo camera, complete, cost $95 ; Scientific American from 
1859 to 1880, 4 vols, bound. D. Keesler, Stony Point, N. Y. 
Sea shells of Atlantic coast, scientifically marked, for 
books, old or new magazines, Indian relics, natural history 
specimens, apparatus; anything. Wilfred Leon Miller, 
P. O. Box 392, Cape May, N. J. 
A new 40 diameter microscope, corals, and minerals, for a 
stylographic pen, air gun, or offers. J. McBride, 54 Garley 
St., Chicago. 
A dulcimer that cost $20, books and fossils, for a tele- 
scope, microscope, fossils, Indian relics, or offers. E. J. 
Votaw, Salem, Iowa. 
A self-inking model press, 5 x 7%, cost $23 ; $90 worth of 
scroll-saw designs in lots to suit; Scientific American, 1880; 
Palliser's Useful Details, $3 ; for photo outfit or offers. 
C. H. Parker, Coldbrook Springs, Mass. 
Telegraph key and sounder, Frank Leslie's Illustrated 
Magazines, mounted microscopic objects, natural curiosities, 
for bull's-eye condenser, photograph camera, Unabridged 
Webster Dictionary, or offers. W. T. Alan, Greenville, 
Mercer Co., Pa. 
Large magic lantern, spectroscope, pantagraph, for en- 
larging drawings, rosewood writing desk, man's saddle, for 
microscope, photo outfit or offers. Thomas Walters, Bergen 
St., East of Brooklyn Ave., Brooklyn, N. Y. 
Model card press, chase 3K x 5 J^^, with 4 fonts type, cases, 
etc., for good foot lathe. Mills Day, 2 Farmington Av., 
Hartford, Ct. 
French microscope, inclines to any angle, delicate fine 
motion, neat upright case, cost $17.50, for scientific books; 
send list to W. Fitz, P.O. Box 2852, New York. 
Wanted, Quinby's New Bee Keeping, for Our Own Birds 
of the United States, by W. S. Baily ; new. Joseph 
Anthony, Jr., Coleta, Whiteside Co., Illinois. 
Printing type, small pica ; large and small capitals, and 
small letters ; 60 to 65 lbs., including two large cases; also 
gothic nonpariel, for trade. J. Siler, 1242 Broadway, St. 
Louis, Mo. 
One years' copy of Aldine, cost $5.50, and German 
accordion, with instructions how to use it, cost $5.00, for 
offers. Chas. Dempwolf, 86 Benson St., Paterson, N.J. 
A Novelty printing press, with type, prints a form 5x7 
inches, cost $40.00, for a microscope, photographic appa- 
ratus, or offers. T. W. Patterson, Warsaw, N. Y. 
$80 worth of (nearly new) printing material, minerals, 
fossils. Aboriginal relics, etc., for scientific books, good 
American watch, and offers. F, M. Farrell, Cobden, Union 
Co., Ills. 
Rocks, minerals, fossils and fresh water shells for micro- 
scope stand, $20 to $75, also for objectives, turning lathe 
type, and tools. D. D. Babcock, South Dansville, N. Y. 
Magic lantern, in good order, condensing lens, 2^ in. 
diameter, 8 slides. For small photographic camera or offers. 
H. A. Giddings, 4 Union Place, Classon Ave., Brooklyn. 
THE "ZERO" REFRIGERATOR. 
One of the most valuable adjuncts to modern 
life is the refrigerator, preserving our food as 
fresh in the hottest months of summer as in the 
cold season. Among the various styles in the 
market the "Zero" has long been prominent by 
reason of the many excellent merits it possesses, 
among which may be mentioned beauty of de- 
sign and excellent workmanship; the absence 
of all communication between the ice and pro- 
vision chamber; the absence of moisture on 
the inside lining; the impossibility of the con- 
tact of hot air with the ice ; the condensation 
of the moisture contained in the provision cham- 
ber on the cold surface of the ice-box, which, 
running off into a trough, is passed out at the 
bottom ; the economy of ice and uniformity of 
temperature; and the filling of the refrigerator 
with cork and charcoal, which are good non-con- 
ductors, cleanly and odorless. These refrigera- 
tors are being used in many hotels, flats and pri- 
vate houses throughout the country, and seem 
to give general satisfaction. The manufacturer 
is A M. Lesley, of 380 Sixth Avenue, this city. 
