O> 
; TWELFTH YEAR, TARCH 9% 12( SINGLE Copizs, TEN CEN 
4 } V XXIII N MARCIE Lo S94, 
am OL. X2 ; oO. 581. ’ $3. 3.50 PER YEAR, IN Laoee 
¥ eee a Se SS SSS = 2 SS ==. ae — SSS SS = SSS 
; D ———— se 
3 S X 9) SSS. — 
ConreENgmSs. MSS) (D> 
‘ Ci Me, Standard Quality, and in great 
: C&S) verpr te ie ee: for Schools and Colleges. 
id Tise IMporRTANCE OF STRUCTURAL DETAILS IN THE a Laboratories Equipped. Estimates sub- 
Strupy of PLrants. W. W. Rowlee 4 155 GA mitted. Correspondence requested. 
Nationar Park Protection, Geo, Bird Grinnell 156 ) Ask for Abridged Catalogue, No. 219, 
} Tne SEMBLING oF A LarGcr Native Morn, TELEA \ and for Circular of our Sixteen Il- LO In 
i ~ a 
. / Poryrnemus. H, Garman a 5 3 lustrated: Catalogues, which aggregate UCC 1) C. 
r Ts GRANITE EVER Meramorpuic? C, Callaway 1600 pages PHILADELPHIA, U. S. A 
SE-CAusING MicRoBES 
Fietp Mice, Mores 
Tur Employment or DisE 
FOR THE DeEsTRUCTION 
iT DIPLOMAS AT THE WORLD'S FAIR 
F AND Simirar Vermin. Gerald McCarthy 158 4 + 
Th nN 
Sctentiric WASHINGTON é f o NSS CORNELL UNIVERSITY | 
eae SpNps OF THE PacrFic Co, asrT. Clarence SU VI VI E R S (G H O ) Ll 5 . 
ue : 5 5 23) 
oe Sete Breanmmenanay OF Rye, Charles Vv. JULY 6---AUGUST 16. | HYSICAL & CHEMICAL 
hapin : . : . . + 160 Courses are offered for Teachers aud Advanced 
Letters to tHe Eptror: Students in Greek, Sanskrit, Latin, German, French, APPARATUS 
ieee _ | Spanish, English, Philosophy, Experimental Psycholc y, 
PaLfouiruic Porrery. Henry W. Haynes - 161 | Pedagogy, Political Economy, Mathematics, Physics, | py- 722 USTRATION and LABORATORY use in 
Chemistry , Botany, Geolog Vy Drawing and ‘Art, Mechan- 
efical Drawing and Designing, Architectural Drawing, 
Experimental Engineering, Physical Training. 
Mr. Mac DouGat anv PoisoninG From Cypri- 
PEDIUM SPECTABILE. L, H. Pammel 
Jas. M. Macoun . 
SCHOOLS and COLLEGES. 
A Minitarure Water Lity. 162 es 5 
Tue Swastica Cross. G, Frederick Wright . x62] flee gre ee Tee eS Of Haze APPARATUS FOR HARVARD (COURSE IN 
aks SNe Se ew or circulars apply to HE REGISTRAR, 
NAgDNE STUDY IN THE SCHOOLS. Tey A. Os- fas CorneELL University, Ithaca, N. Y. PHYSECS and CHEMISTRY. 
A BRILLIANT AURORA, 25. Culver . 63| PEN BOOKS FOR PRICH OF ONE. | Seyp ror CaraLocur, 
THE DURABILITY OF THE een PROPERTY SEND FOR A CATALOGUE OF ~ : an EEL Ta 
oF Porsos Ivy, Ruvs Rapicass L, (R. Tox THE HUMBOLDT LIBRARY BR. S. RITCHIE & SONS, 
: CODENDRON Bog : i 
A New Dicory a Mammo es THE ean AS a ON SCM. AEG) BENE VN BEESON, BECW SUSE, Wiest, 
PRGOSNee Su We WalReuen) oe: ri x6 Containing the works of the foremost scientific writers (Within City limits of Boston). 
4 | of the age.—The Great Classics of Modern Thought.— aie) jon 3 
Book Reviews 164 Strong meat for them that are of full age. Single num- ESTABLISHED 1850. 
* bers 15 cents. Double numbers 30 cents 
Norrs anp News c é 5 5 9 a . 166 Address :—THeE Humsoitpr PupxisHineG Co., 
ig ASIC Place, New Woks, 
MACMILLAN eae COR Cole NEW BOOKS. 
Economic Geology of eology of the United States. 
With Briefer Mention of Foreign Mineral Products. 
By R. 5. Tarr, B.S., F.G.S.A., Assistant Professor of ‘Geology at Cornell University. $8vo, $4.00. 
Proressor J. Norman Lockyer’s NEw and Imporrant Work, 
The Dawn of Astronomy. 
A Srupy or THE TEMPLE WorsHIP AND MyTrHOLoGy OF THE ANCIENT EGYPTIANS. 
With numerous illustrations and full-page plates. By J. Norman Lockyer, F.R.S., Author of ‘‘The Meteoritic 
Hypothesis,” ‘‘ The Chemistry of the Sun,” etc. Royal 8vo, $5.00. 
2 
: Electric Waves: 
BrinG RESEARCHES ON THE PROPAGATION OF ELECTRIC 
ATION WITH FINITE VELOCITY THROUGH SPACE. 
By Dr. Hrmricu Herrz, Professor of Physics in the Uni- 
versity of Bonn. Authorized English Translation by 
D: E. Jones, B.Sc, With a pr eface by Lord Kevin, 
President of the Royal Society. Syo, Price, $2 
The Theory of Heat 
By Tuomas Preston, M.A. (Dub.), Fellow of the Royal 
University of Ireland, and Professor of Natural Philos- 
ophy, University College, Dublin. With Illustrations. 
8v0, Price, $5.50. 
An Elementary Treatise on Theoretical Mechanics. 
By Professor ALEXANDER Ziwet, of the University of 
Michigan. S8vo. Part J. Kinematics. Price, $2.25. 
Bartle Sia TICS) ReuiCe nase 
Inorganic Chemistry for Beginners. 
A Text-Book on Electro-Magnetism and the Construc- 
tion of Dynamos. 
By Professor DucaLp C. Jackson, of the University of 
Wisconsin. In two Volumes. 
Now Reapy. Vol. I., r2mo, $2.25. Vol. Il. In PreE- 
PARATION. 
The Study of the Biology of Ferns by the Collodion 
Method. 
For Advanced and Collegiate Students. By Grorce F. 
ATKINSON, Ph.B., Associate Professor of Cryptogamic 
Botany in Cornell University. 8vo, Price, $2.00. 
The Beauties of Nature and the Wonders of the World 
We Live In. 
By Right Hon. Sir Joun Luppock, M.P., F.R.S. With 
numerous illustrations and full-page plates. Third 
Adition. 3r2mo, cloth, gilt top. Price, $1.50. 
Romance of the Insect World. 
By Sir Henry Roscor, F.R:S. Assisted by JosepH By Miss L. N. BapENocH. With illustrations by Mar- 
Lunt, B.Se. (Victoria). With 108 illustrations. Garer J. D. Bapenocw and others. Crown 8vo, 
r6mo. Price, .75 cents. cloth, gilt top. Price, $1.2 
/ Now Reapy. Vor. I., No. 5. MARcH—APRIL. 
THE PHYSICAL REVIEW : 
A Journal of Experimental and Theoretical Mechanics. | Conducted by Epwarp L. Nicwors and Ernest MERRITT. 
Tasre or Contents.—Frontispiece: Portrait of Professor Hertz; Watigue in the Elasticity of Strete hing; The Electrical Conductivity of Copper, as affected by the 
Surrounding Medium; The Use of the Sectored Disc in Photometry; A Study of the Polarization upon a Vhin Metal Partition in a Voltameter II.; The Quantitative 
z Determination of Radiant Heat by the Method of Electrical Compensation, ete., ete. 
Sinete Ceptes, 50 cents. 
MACMILLAN & CO., 
Annual Subscription, $3. 
66 Fifth Avenue, New York. 
