March 2, 1894. 
is no need of extended notice of the separate essays, 
which are so well known to scientists, but their publica- 
tion together, assisted by the preface, tells us that as a 
unit they still represent Mr. Huxley’s views upon evolu- 
tion and that he has in later years not swerved to any 
great extent from the position adopted even in the first 
essay. This collection of essays of Darwinian hypothesis 
certainly forms a valuable addition to one’s library on 
evolutionary topics. The title is unfortunate, for Pro- 
fessor Huxley has chosen the same title which has been . 
earlier used by Professor Gray for a similar book, and two 
books with the same title are sure to produce confusion. 
Guide to the Study of Common Plants. An Introduction to 
Botany. By Voitnry M. Spatpinc, Professor of 
Botany in the University of Michigan. Boston, D. C. 
Heath and Co., 246 p., 1884, 85 cts. 
Tuis little book will doubtless prove of great assistance 
to many teachers of botany in the elementary classes. 
The author has given an admirable series of exercises, 
developing a natural and practicable method in the ele- 
mentary study of plants and plant life. The publication 
has been suggested by the frequent inquiries of teachers 
regarding the preparation in botany required for admission 
“to the University of Michigan. 
Summer Birds of Green County, Pa. By WARREN JACOBS. 
Waynesburg, Pat, Republican Book and Job Office. 
Bird Life in Labrador. By WINFRED A. STEARNS. Am- 
herst, Mass. $1. 
Tue first of these is a brief pamphlet giving a list of 
the summer birds of Green County, wea a note or two as 
to their habits. 
The second is a somewhat more extended account of 
the birds of Labrador and takes pantly ¢ the form of a 
SCIENCE: 
125 
narrative of Mr. Stearns’s journey in that country. It 
contains no descriptions of the birds but more in regard 
to their habits and abundance. 
—S. C. Griggs and Company of Chicago have pub- 
lished a book by John P. Davis on ‘‘’The Union Pacific 
Railway,” which gives a history of the railway in question 
from its origin to the present time, with special reference 
to its relations with the United States Government. It 
tells how the idea of a trans-continental railway originated 
and how for many years its realization was prevented by 
the difficulties of the work and the influence of sectional 
jealousies. The successive attempts that were made to 
obtain a charter are recounted, with an analysis of the 
charter under which the road was actually built. A 
chapter is also devoted to the operations of the Credit 
Mobilier and the legislative scandal that arose in conse- 
quences, siihe author i is inclined to excuse the operations 
in question on the ground that they were no worse than 
occurred in the building of other railroads in those days; 
and yet in his preface he says, speaking of the Union 
Pacific: ‘‘The agencies through which this particular 
instrument was obtained and applied to use will be 
found seriously out of harmony with settled political and 
moral principles.”’ In conclusion, Mr. Davis considers 
briefly what steps the government ought to take to recover 
the sum due it from the railway company, which will 
amount at the maturity of the bonds in 1899 to 
$125,000,000. He notices several plans that have. been 
suggested, but comes to no definite conclusion as to 
which is the most advisable; so that on the practical 
aspect of the subject he does not shed much light. As 
a history of the railway, however, the book will doubtless 
be of use. 
EXCHANGES. 
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where the system has become 
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as a general tonic and vitalizer, 
affording sustenance to both 
brain and body. 
Dr. E. Cornell Esten, Philadel- 
phia, Pa., says: ‘‘I have met with the 
greatest and most satisfactory results 
in dyspepsia and general derangement 
of the cerebral and nervous systems, 
causing debility and exhaustion.” 
Descriptive pamphlet free. 
Rumford Chemical Works, 
Providence, R.I. 
Beware of Substitutes and Imitations, 
[Free of charge to all, if of satisfactory character. 
Address, N. D. C. Hodges, 874 Broadway, New York.] 
pes SALE OR EXCHANGE.—Safe, nearly new, 
1,150 pounds. Will sell cheap, or exchange for a 
Safety Bicycle, Gasoline Engine, Music Instruments, or 
anything that may suit. Safe has been used but little 
and is as good as when bought. Address, A, Lagerstrom, 
St. Peter, Minn. 
IVING near the famous ‘‘ Serpent Mound,” Adams 
County, Ohio, I have had opportunity to make a 
collection of pre-historic relics. I willsellsame to any one 
interested in archeology. Writeme, Warren Cowen, 
Elmville, Highland County, Ohio. 
O EXCHANGE.—Herbarium specimens. 
H. P. Chandler, Beaver Dam, Wisc. 
Address, 
ARYOKINETIC FIGURES IN MAMMALIAN 
TISSUES.—Since the publication of my Prelim- 
inary Notice in Sczezce for Dec. 1, 1893, many parties 
have written me asking for permanent preparations show- 
ing mitosis. To these parties I -have sent slides, and I 
now offer to all who desire them slides showing mitotic 
figures in nuclei of embryo kitten. A good immers 
objective is necessary to make out the figures s 
factorily. Send 60 centsinstamps. If the slide is not 
satisfactory, return it, and [ will return the money. I do 
not care to exchange slides... Frank S. Aby, State Uni- 
versity, Iowa City, Iowa. 
OR SALE.—A small collection of bird skins, con- 
sisting of specimens of New England species, 
most of which are in good condition and all have full | 
data. Nearly all were collected in the Connecticut valley 
in Massachusetts. Price, $10. Address, H. L. Clark, 
3922 Fifth Avenue, Pittsburgh, Penna. 
OR SALE.—Price $150, cost originally between $300 
and $400, a microscope and following accessories: 
Acme (No. 2), stand and c lost, 2975 j Crouch, one-fifth 
collar adjustment ana objectiv: e, Tolles, four-tenths 
ditto, $45; Tolles amplifier, $12 ; lush and L: amb, half 
solid eye piece, $8; Baush and 1, amb, acromatic con- 
denser, $18; Hartnock Polarizer, $30; turn-table, $6; 
Hartnock, camera lucida, $20. D. T. Mz arshall, Metuchen, 
N. J. 
O EXCHANGE.—Works on entomology, botany | 
and palaeontology for works on Indians and ar- 
| Tortoises or 
ee 
chexology, H, Justin Roddy, Millersville, Pa. 
V ANTED.—A young man to. canvass for adyertise- 
ments for Sczexzce. The usual commission of thirty 
per cent will be paid. Apply in person at Sczence Office, 
874 Broadway, New York. 
wey BLE honor graduate in Scienceand Philosophy 
desires any suitable work in science, of the nature 
of teaching preferred. Address, E. A. Beckett, Trinity 
College, Toronto, Ontario. 
WV ESNet eel of the Earth, by Hutton. Prin- 
ciples of Geology, by Lyell. Manual of Geology, 
by Phillips. Lehrbuch der Geolgie und Petrefacenkunde, 
by Carl Vogt. Etudes sur le Métamorphisme, by Daubrée 
books on osteology, em 
Send list, 
Can offer a few good 
C. McGregor, Palo 
W- ANTED.—Second-hand 
bryology, and comparative anatomy. 
stating condition a 
sets of birds 
Alto, California. 
We 
nd cash price. 
s if desired. R. 
are engaged in a study of the geographical distri- 
bution and osteology of our North American Box 
Terrapene (Cistudo). Specimens from 
a, Tennessee, Alabama and the Dakotas are es- 
ly desired. Material from other localities would be 
welcomed. Would gladly pay expressage and return 
spec imens if desirable. Specimens should be enclosed in 
all box with but little paper (without alcohol) and ad- 
Taylor, Walker Museum, University of 
», Tl. 
Gec 
pe 
Wwe ANTED.—Addres of persons interested in ar- 
logy. C opies ¢ of the new archzologic journal in 
exchanse for lists of collectors. A collection of 10,000 
valuable objects, the results of my nine years’ exploration 
in the Mississippi Valley, for sale. Price, $ . Warren 
K. Moorehead, Waterloo, Indiana. 
tracts made from departmental l’- 
archives, and He om the Congressional 
Library at the Ni itional Capital ; languages translated by 
an experienced linguist. Addre ss, *‘ Translator,” 
Vifteenth Street, NW. Washington, D, C. 
2020 
\\VEStEo (1) Data of Cases of Contagious Mental 
Disorders ; (2) ‘* Anatomy of Suicide,”’ by Forbes 
Winslow; ‘* English Suicide Fields,’ Radcliffe. State 
date and price of (2) and (3). Address, James Wood 
M.D., 162 St. John’s Place, Brooklyn, N, Y, ! 
