EIGHTEENTH YEAR OF PUBLICATION 
AND ANNALS OF 
ASTRONOMY, BIOLOGY, GEOLOGY, INDUSTRIAL ARTS, 
MANUFACTURES, AND TECHNOLOGY. 
(MONTHLY, FORMERLY “THE QUARTERLY JOURNAL OF SCIENCE.’) 
Vol. III. ©£) 
No. XCII. 
ATJG-TJ8T 
T8S1. 
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 44 i 
2. Geology as a Science and an 
Art. By C. Lloyd Morgan 449 
3. The Source of Eledtric Energy. 
By Charles Morris .. .. 461 
Sham Employers. 
Hepburn Davidson 
By J. 
469 
Sanitary Reform and its 
Vagaries : The Sanitary In- 
stitute of Great Britain . . 474 
Articles — continued. page 
6. On the Probable Extension of 
Solar Physics to Matters 
Affedting the Agriculturist, 
Merchant, and Man of 
Science. By A. H. SwinTon 481 
Analyses of Books. 
The Cat .. 485 
Education, Scientific and Tech- 
nical : or. How the Inductive 
Sciences are Taught, and How 
they Ought to be Taught . . 489 
The Occult World 493 
Songs and Sonnets of Spring-time 495 
Australian Aborigines. * .. .. 499 
Correspondence 499 
Notes 501 
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Where Communications for the Editor and Books for Review may he addressed. 
i 
PRICE ONE SHILLING AND SIXPENCE. 
IT he Articles and Reports in this journal are Copyright .1 
