SEVENTEENTH YEAR OF PUBLICATION. 
AND ANNALS OF 
ASTRONOMY, BIOLOGY, GEOLOGY, INDUSTRIAL ARTS, 
MANUFACTURES, AND TECHNOLOGY. 
(MONTHLY, FORMERLY “THE QUARTERLY JOURNAL OF SCIENCE.") 
Vol. II • (series) 
No. LXXIX. 
CONTENTS. 
vJTJXjIT 
1 . 880 . 
Articles. page i 
1. The Evolution of Scientific 
Knowledge. By C. Lloyd 
Morgan 415 
2. Habits and Anatomy of the 
Honey-bearing Ant. By C. 
Morris 43 ° 
3. The “Laws .of Emphasis and 
Symmetry.” By J. W. 
Slater 434 
4. Instind and Mind. By S. 
Billing • • 43 8 j 
5. Tuberculosis transmissible 
through the Meat and Milk 
of Animals affe&ed with it. . 441 
6. Natural Science and Morality. 
By S. Tolver Preston .. 443 
Analyses of Books. page 
Catalogue of Books and Papers 
relating to Ele&ricity, Magnet- 
ism, the Eledtric Telegraph, &c. 463 
Heat, a Mode of Motion . . . . 464 
Degeneration 465 
Letter of the Commissioner of 
Agriculture on Sorghum Sugar 467 
Alphabetical Manual of Blowpipe 
Analysis, showing all Known 
Methods, Old and New .. .. 468 
Journal of the Society of Tele- 
graph Engineers 469 
Astronomical Observations made 
at the Melbourne Observatory '4.70 
The American Naturalist .. .. 470 
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, 
r The Articles and Reports in this Journal are Copyright .] 
