EIGHTEENTH YEAR OF PUBLICATION 
f 
THE 
OF SCDE1I 
AND ANNALS OF 
ASTRONOMY, BIOLOGY, GEOLOGY, INDUSTRIAL ARTS, 
MANUFACTURES, AND TECHNOLOGY. 
(MONTHLY, FORMERLY “THE QUARTERLY JOURNAL OF SCIENCE.’) 
Vol. III. GS£) 
No. XCIII. 
SEPTEMB SB 
L 881 . 
CONTENTS 
Articles. 
page 
1. The Centre of Gravity of the 
Earth, and its Effedt on As- 
tronomical Observations. By 
Col. A. W. Drayson, R.A., 
F.R.A.S 505 
2. The Source of Eledtric Energy. 
By Charles Morris .. .. 514 
3. Hylozoism versus Animism. 
By C. N. Communicated by 
Dr. R. Lewins 521 
4. A Geological Idea of Lord 
Bacon’s. By Dr. O. Reich- 
ENBACH . . 526 
5. On Diptera as Spreaders of 
Disease. By J. W. Slater 533 
6. The Transfer of Sensation . . 540 
PAGE 
Analyses of Books. 
Butterflies, their Strudture, 
Changes, and Life-Histories, 
with Special Reference to Ame- 
rican Forms 547 
Annual Report of the Board of 
Regents of the Smithsonian 
Institution for the Year 1879. . 550 
Light and Heat 551 
The Boundaries of Religious Li- 
berty and the Science-Dodtrine 
of Modern Exploration of 
Nature . . 552 
Conic Sedtions treated Geome- 
trically .. 553 
&c., &c. 
Correspondence. Notes. 
LONDON : 
3, HORSE-SHOE COURT, LUDGATE HILL. 
Where Communications for the Editor and Books for Review may be addressed. 
£ 
PRICE ONE SHILLING AND SIXPENCE. 
[The Articles and Reports in this Journal are Copyrights 
-S' 
I 
