Xil 
9 
? 
IV. 
VE 
WAT. 
Vif. 
4 
XII, 
THE EVOLUTION OF LIFE 
FACING PAGE 
Organisms taken from previously closed Tubes 
which had been heated to 100° C. for ten 
minutes (Figs. 11, 12, 13) 
. Other Organisms taken from previously Anees 
Tubes which had been heated to 100° C. for 
ten minutes (Figs. 14, 15, 16) 
Organisms taken from previously closed Tubes 
which had been heated to 115° C. for ten 
minutes (Figs. 17, 18, 19) ; 
Organisms taken from previously closed Tubes 
which had been heated to 120° C. for ten 
minutes (Figs. 20, 21, 22) : 
Organisms taken from previously closed Tubes 
which had been heated to 125° C. for ten 
minutes (Figs. 23, 24, 25) 
. Organisms taken from previously closed Tubes 
which had been heated to 130° C. for twenty 
minutes (Figs. 26, 27, 28) 
. Other Organisms taken from ee Parts eased 
Tubes which had been heated to 130° C. for 
twenty minutes (Figs. 29, 30, 31, 32) 
Other Organisms taken from previously closed 
Tubes which had been heated to 130° C. for 
twenty minutes (Figs. 33, 34, 35) : 
Showing some Effects of High Temperatures 
upon the Saline Media themselves (Figs. 36, 
256 
258 
263 
273 
tQ 
SJ 
Ww 
*,* For permission to reproduce the woodcuts shown in Figs. 2, 3, 4, 5, 
6, 7, 9, and Io, my thanks are due to the Council of the Linnean Society ; 
while for permission to reproduce Fig. 
Council of the Royal Society. 
Ir I have similarly to thank the 
