TWENTY-FIRST YEAR PUBLICATION. 
AND ANNALS OF 
ASTRONOMY, BIOLOGY, GEOLOGY, INDUSTRIAL ARTS, 
MANUFACTURES, AND TECHNOLOGY. 
(MONTHLY, FORMERLY “THE QUARTERLY JOURNAL OF SCIENCE.’’) 
I 
Articles. 
1. Hylo- Idealism : a Defence. 
(Communicated by Robert 
Lewins, M.D.) 6g£ 
2. Wohler and Liebig. By Miss 
Kate Windscheid . . . . 706 
3. 3. On Thunderbolts. By Col. 
the Hon. Arthur Parnell, 
(late Royal Engineers) . . .. 719 
4. An Exegesis of Darwinism. 
By Oswald Dawson . . . . 725 
5. Our Measures and Our Stand- 
ards. By Louis D’A. Jack- 
son, C.E 739 
Analyses of Books. 
Hygiene ; its Properties as applied 
to Public Health 744 
Chemical and Physical Analysis 
of Milk, Condensed Milk, and 
Infants’ Milk- Foods, with spe- 
cial regard to Hygiene and 
Sanitary Milk Inspection .. 746 
Expository Thoughts on the Cre- 
ation 748 
British Fresh-Water Algte, exclu- 
sive of the Desmidiese and 
Diatomaceas 750 
&c., &c. 
Correspondence 756 
Notes 779 
LONDON 
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[The Articles and Reports i<\ this Journal are Copyright .] 
