xii CONTENTS. 
PART IT. 
(From the Contemporary Review of April, 1874, with Re- 
arrangements and Additions.) 
PAGE 
Inconsistency of Limiting Archebiosis to the Past—Professor 
Huxley’s Inaugural Address—Its Partial Consideration 
of the Facts—Refutation of its Principal Positions—Air 
does not Swarm with Bacteria Germs—Bacteria will 
Appear in Fluids Previously Heated to 212° F.—Yet 
Bacteria and other low Organisms are Killed in Fluids 
Heated to 140° F.—Professor Huxley’s Action in Face 
of New Facts—Behaviour of Other Opponents of Spon- 
taneous Generation—Sir John Herschel’s Precepts. . . 43-50 
Necessity of Examining the New and the Old Doctrine as 
mere Hypotheses—Each Hypothesis Supported by an 
Analogical Argument—That in favour of Archebiosis 
—Foundations of the Counter Hypothesis—Insufficient 
Warrant for the Formula ‘Omne Vivum ex Vivo’—It 
affords a Notable Instance of Faulty Induction—Weighty 
Considerations in Support of Archebiosis—Heterogenesis 
a Necessary Consequence of Archebiosis—Its Occurrence 
harmonious with Physical Doctrines of Life—Evidence of 
its Occurrence more Varied than for that of Archebiosis— 
Detailed Enumeration of Evidence—Panspermism Weak 
even as an Hypothesis—Mr. Justice Grove’s Dictum— 
Panspermism can be Overthrown by a ‘ Crucial Instance’ 
—Vacillations and Evasions of some Evolutionists in 
Connection with this Part of the Subject—Concurrence 
of Testimony as to the Temperature at which Living 
Matter is Killed— Establishment of Archebiosis as a Law 
of Nature. 2. 6 6 1 ee eee ee eek. 50-69 
New Views — Characteristics of Living Matter — Its 
Tendency to Organization—Conditions which Faveur it— 
Cause of Reproduction — Meaning of Heterogenesis— 
Ephemeromorphs — ‘ Alternate Generation’—Origin of 
Species—Limitation of Sphere of ‘ Natural Selection ’— 
