THE YOUNG SCIENTIST. 
27 
Exchanges. 
WE would again call the special atten- 
tion of our subscribers to the very 
reasonable rules which we have laid 
down in the matter of exchanges. Some 
of our friends think that we ought occa- 
sionally to relax the rigor of these rules 
for their especial benefit. To such we 
can only say that if we change the rule 
for one we must do it for all. We would 
much rather give a subscriber free space 
in our advertising columns than break 
through our rules in regard to exchanges. 
So if your exchange has not appeared, 
just sit down again with the rules before 
you and write it out in conformity with 
them. 
BOOK NOTICES. 
Easy Experiments in Cliemistry and Natural 
Philosophy. For Educational Institutions of 
all Grades and for Private Students. By G. 
Dallas Lind, author of "Methods of Teaching 
in Country Schools," etc. Price, 40 cents. New 
York: Industrial Publication Co. 
The author of this work tells us in his preface 
that he "has spent much time in studying the 
art of illustrating the subjects of Chemistry and 
Natural Philosophy by means of simple and 
cheap apparatus." After a careful examination 
we feel no hesitation in saying that the result is 
very satisfactory. By the use of such simple 
things as ordinary bottles and preserve jars, the 
use at least of which may be obtained at almost 
any time for little or nothing; of corks, wires, 
and similar odds and ends, he shows how to per- 
form a great many very instructive, interesting, 
and beautiful experiments. In many cases he 
uses very common and simple things for articles 
which are more elegant and convenient, if not 
more efficient. Thus for tubes he suggests the 
use of elder-stems ; old cans, such as are used for 
preserving meats, oysters, etc., are frequently 
brought into play. It is really astonishing to see 
how much may be accomplished by means of 
such simple materials and a little ingenuity. An 
important feature of the book is the fact that the 
explanations are all scientifically accurate. To 
the teacher it will prove a means of enlivening 
many an otherwise dull recitation, while to the 
self-taught student it will be a source of endless 
amusement and pleasure. 
The Phrenological Journal. S. R. Wells & 
Co., 753, Broadway, New York. 
"Whatever may be said about the special prin- 
ciples or theories advocated by this journal, it is 
an unquestionable fact that aside from such 
matters the subscribers get a full equivalent in 
the sprightly biographies and general articles 
which the journal contains. The tendency of the 
Phrenological Journal has always been towards 
purity and correct morality, and it should be a 
welcome visitor to every home. 
Ward's Natural Science Bulletin. 
This is a new candidate for favor, and one for 
which we predict a very great success. Prof. 
Ward is well known as the possessor of th© 
largest commercial collection of really good min- 
erals, fossils, and objects of natural history in 
general on this continent, and it therefore fol- 
lows that material and means are at hand to 
make a good journal. Numbers 1 and 2 are before 
us, and they certainly promise well. Filled with 
able and interesting original articles, they are of 
great value to young people who are fond of col- 
lecting, and who wish to understand the scienti- 
fic relations of the things they collect. The prac- 
tical character of the contributions to this journal 
will be appreciated by those who read the article 
on Bird Skins, which we have transferred to an- 
other column. 
The Bulletin is issued quarterly at the rate of 
fifty cents per year. It is printed in fine clear 
type on excellent paper, and we hope to make 
favorable arrangements for clubbing it with the 
Young Scientist. 
Astronomy for Amateurs. 
BY BEKIilN H. WEIGHT. 
(All calculations are for the Latitude of New 
York City.) 
THE PLANETS FOR MAECH, 1882. 
MEECUEY. 
This month Mercury maybe seen in theeast^ 
before sunrise, as a morning- star. He attains 
his greatest angular distance west of the Sua 
on the 21st, and accordingly is brightest from 
the 20th to 25th. This will not be as favorable 
an opportunity to see him as last month, but 
still he can be seen as he rises about one hour 
before the Sun. 
VENUS. 
During the latter portion of the month Venus 
may be seen in the Avest, just after sunset, set- 
ting, on the 10th, at 6.16 even. ; 20th, 6.40 even.,, 
and 30th at 7.4 even. 
MAES. 
The flattened appearance, or rather gibbous 
phase of Mars will be more noticeable this 
month than again this year. He arrives at 
eastern quadrature April 1st, and the Moon 
passes 3° south of him on the 26th. Mars never 
has the horned or crescent phase, but appears 
slightly gibbous at quadrature. He passes the 
mei-idian on the 10th at 7.2 even. ; 20th, 6.39 
even., and 30th at 6.18 even. As Mars is two 
months in passing over one sign he will not be 
far from the place given last month, 
t 
