92 THE YOUNG 
EXCHANGES. 
Only those who are yearly subscribers, and whose names 
are entered on our books have the privilege of inserting ex- 
changes. 
Exchanges must be on separate slips of paper or postal 
cards. If mixed with business letters or cards they cannot 
be used. 
Exchanges must not exceed thirty words. 
Buying and selling belong to the advertising department. 
We reserve the right to omit the exchange column, when 
we have not room for it, and the amount of space at our dis- 
posal will regulate the number of insertions given to each 
exchange, the preference being always given to those who 
have not previously used our columns. 
To exchange, for engine or offers, a pair of Bliss 
Telephones and 200 feet of copper wire. J, W. 
Grant, 402 Broad St., Newark, N. J. 
To exchange, a 2>2 octave chromatic xylophone 
for microscope, microscopical apparatus, scien- 
tific boolvs, or offers. J. E. Moore, Box 81, New- 
castle, Ind, 
I have McAllister's Naturalists' Microscope, with 
achromatic triplet objectives, used only 2 months, 
cost $12.00. I wish to exchange for an inch or 
2-3 inch objective. Address, with particulars, F. 
r. Colwell, Urbana, Champaign Co., O. 
To exchange for offei's ; a small lot of micro- 
scopic mounting apparatus. List on application 
to J. N. B„ Box 1168, N. Y. 
To exchange, books and Young Scientist, and 
trinkets, for other books, revolver, or stylo- 
graphic pen. Frank Bicknell, Humboldt, Iowa. 
Ancient petrified grain, Indian pottery, birds 
eggs, papers, magazines. Confederate money, 
fossils, minerals, to exchange for arrow-heads, 
Indian relics. Confederate, Continental, and 
other paper money. Fred T. Brinkerlioff, Box 
347, Neenah, Wis. 
Minerals, tricks, copper coins, book on pigeons 
and rabbits, Wilson School History, for book on 
experiments, or specimens, minerals, stamps or 
coins. P. E. Bradley, Box 305, Dunkirk, N. Y. 
Wanted, a second-hand screw cutting foot 
lathe, must be in good condition ; state what is 
wanted in exchange, also size and make of lathe. 
G. A. Clark, Castalia, Iowa. 
To exchange, minerals, shells, fossil shells, 
birds eggs, etc., for minerals, shells, fossils, 
stuffed birds, birds eggs, and books. U. S, Grant, 
Des Moines, Iowa. 
Wanted, botanical correspondents for the com- 
ing season, also amateur correspondents in 
chemistry. L, Box 70, East Templeton, Wov. Co., 
Mass. 
Wanted, to exchange a well-equipped job print- 
ing outfit, for books or ofi'ers. Frank A. Nib- 
lack, Rockport, Ind. 
Will exchange for Vol. 2 of the Young Scientist, 
instructive books bound in cloth to the value 
of $1.50. Chas. H. Williamson, 293 Eckford St., 
Greenpoint, Brooklyn, N. Y. 
I have a new Munsen's battery, large size, which 
I wish to exchange for a good revolver or offers. 
Eobt. T. Boyle, 351 West 83d St., New York. 
Hair of American deer to exchange for diatoms, 
foraminifera, or other material. W. H. Osborn, 
Chardon, Ohio. 
To exchange, full instruction in short-hand 
writing, and birds eggs, for birds eggs, postage 
stamps, or offers. M. F. E., 51 Spencer St., Albany, 
N. Y. 
Wanted, specimens in geology, entomology, 
oology, etc., for those in other localities, also 
coins and a charm microscope (magnifies 1,000 
times) for one having a different view. J. H. 
Jones, Frankfort, N. Y. 
SCIENTIST. 
" History of Our Country," by Lossing, in six 
parts, price $15, to exchange for printing press or 
offers. Frank Chandler, Waverley, Mass. 
Fine Devonian and Carb. fossils for others, 
especially cretaceous fossils, scientific books or 
papers ; Pitman's short-hand works for books or 
offers. A. Stapleton, East Point, Tioga Co., Penn. 
Wanted, scientific books and apparatus; send 
lists and say what is wanted in exchange. Ewing- 
McLean, Greeneastle, Ind. 
Send for exchange list of insects, especially 
Coleoptera and Lepidoptera. Philip Laurent, 
621 Marshall St., Philadelphia, Pa. 
For printing press or offers, achromatic tele- 
scope, $8.50; microscope, $5; set drawing instru- 
ments, $3; revolver, $3; Phrenological Journal,. 
$2.50 ; books, 12 plays, farces, dramas, burlesques, 
etc., $1.80. F. E. Payne, Alma, Mich. 
One pair 3 lb Indian clubs, one scroll saw, one 
pocket lantern, and a large number of books, for 
magic lantern, pair telephones, photographic 
camera, or offers. Thos. A. Black, Lock Box 678, 
Scranton, Pa. 
For exchange, pocket lantern and instruction 
books for cornet and clarionet; wanted History 
of the "Franco-Prussian War," and the "Lost 
Cause." C. W. Hughes, Shreve, Wayne Co., Ohio. 
I have Brown's heavy scroll saw attachment, 
worth $6, which I wish to exchange for a lathe 
cliuck or offers. C. B. Russell, Waterbury Centre, 
Will exchange magnets, electric battery, as good 
as new, cost £3 in England, for plating battery and 
materials, or offers. F. Whitehead, Box 55, St.. 
Augustine, Fla. 
American and foreign coins to exchange ; state- 
what you have. W. J. Allen, 126 Twenty-third 
Street, Brooklyn, N. Y. 
To exchange, fine imported game fowls of the 
best strain for Fleetwood scroll saw, compound 
microscope, telescope, magic lantern, shot gun, 
or offers. E. Alexander, Johnstown, Fulton Co., 
N. Y. Box 47. 
J. T. Bell, Franklin, Pa., has set of ivory chess- 
men, German fiute, six extra keys, value $12, 
books, etc., to exchange for magic lantern, musio 
box, guns, revolvers, or offers. 
Birds eggs and arrow-heads to exchange for 
fossils and minerals, and birds eggs ; send for my 
list. Clement G. Bui-ns, Salem, Col. Co., Ohio. 
Minerals (zeolites, etc.), to exchange for other 
minerals : state what specimens you have to ex- 
change. H. L. Clapp, 35 West Cottage St., Eox- 
bury, Mass. 
Type, in exchange for curiosities, fossils, etc. 
Geo. K. Fischer. 729 North 6th St.. Philadelphia, 
Pa. 
I have some stamps which I would like to trade 
for stuffed birds, birds eggs and nests ; I am also 
open to an offer; send for list of stamps. A. G„ 
G., Box 26, Summit, New Jersey. 
HORSFORD'S ACID PHOSPHATE. 
Forest, O., x^pril 13, 1881. 
I take pleasure in stating that I have used your 
Horsford's Acid Phosphate, in several cases of 
chronic gastritis, marked by peculiar red tongue, 
with gratifying results. I also find it an excellent 
menstruum for the administration of Comp. Tr., 
Cinchona, in recovery from malarial fevers where 
there is impaired digestion. By combining it 
with Scudder's Specific Tr, of Pulsatilla, I find it 
very satisfactory in controlling nervousness iit 
females, and quite pleasant to take. 
A. S. May. M.D. 
