CONTENTS. xv 
PAGE 
IV.—.THr Destructive INFLUENCE oF HEAT UPON 
Livinc Matter. 
(From the Contemporary Review of September, 1874, with many 
Additions and slight Alterations.) 
Effects of Boiling Water on Human Tissues—Its Action upon 
Eggs — Importance of Definite Information upon this 
Subject—Reluctance of the Modern Panspermatists to 
Seek it—Original Investigations by Spallanzani—Reasons 
for Referring to them—His Frank Announcement of the 
Points in Dispute— Method and Results of his New 
i-xperiments— His Conclusions and Reasoning thereon— 
His attempt at Reconciliation of Different Experimental 
Results—The Assumptions by which alone he could Stave 
off a Belief in ‘Spontaneous Generation’. . + 133-155 
His Assumptions regarded by the Light of Modern 
Science—Bacteria and their Germs not able to Survive 
Desiccation—Untenability of Another Assumption on 
which he Relied—Reasons for Belief in the Ascertained 
Death-Point of Bacteria (140° F.)—Harmonious Results 
atrived at by Max Schultze, Kiihne, and others—Evidence 
Concerning Organisms in Hot Springs—Unanimity of 
Different Observers as to Death-point of Living Matter— 
This in Accordance with known Unity of Protoplasm— 
Curious Attitude assumed by Opponents of ‘ Spontaneous 
Generation’ — Considerations under which they seek 
Refuge—The ‘Lump’ Theory and its Explosion—New 
Difficulties for Consideration of Opponents—Two Most 
Important Experiments—Impossibility of Explaining their 
Results except by Archebiosis . . . . 2. 2. 1. . . 155-180 
Some Misapprehensions Discussed — Heterogenesis and 
what it Means—The Evolutionist Must Distinguish it from 
Archebiosis—The Vitalist could not believe in Archebiosis 
—The Evolutionist must distinguish between Living and 
Dead Organic Matter—Archebiosis may occur amongst 
Dead Organic Materialsk—The Term therefore Applicable 
to the Process occurring in Ordinary Flask Experiments 
and also to the Primordial Origin of Life—The Actual 
Process of Growth is as inexplicable as the Process of 
Origination . 1. 6 6 6 ee ew ee ee ee 180-186 
