BaxeweLL.—1s Life a Distinct Force ? 418 
*8 p.m. Innumerable monads developed in water surrounding tails; 
began to smell offensively.” [Thrown away.] 
Now, contrast this picture of decomposition following somatic death 
with what took place when the portions of tails were supplied with nutri- 
ment. The note is that they ** showed no Bacteria either at 10 a.m. or 
9 p.m., and, of course, no monads; quantities of young cells, particularly 
upon and near the cut surface. Circulation slowly continuing in large vessels. 
In the fluid floating about were quantities of young cells exactly resembling 
leucocytes.” Even at 10 p.m., although the day was excessively ‘hot, the 
portion kept under the microscope showed no sign of decomposition. 
It is evident that this motion of the blood in the smaller vessels cannot be 
from capillary attraction, for, after the first few moments, the blood in the 
capillaries must have attained its equilibrium. Place a coloured fluid con- 
taining solid non-living particles in a capillary glass tube under the micro- 
scope, and you will find that, in a few moments, the particles will be at 
rest. 
The following experiment shows the length of time the capillary circula- 
tion will continue without nutriment—* 10th March, 1878, end of tadpole's 
tail, circulation continued for thirty-five minutes after separation ; not 
much slower than natural; block at bifurcation of artery; went against 
gravity.” This note refers to a rough drawing made in my note book of the 
appearances presented at two periods after the separation of the tail. 
I have other notes of this phenomenon, but not many, as it was of such 
invariable occurrence that I soon ceased to note it. It may be seen by 
anyone who will take a microscope to a slaughterhouse, and obtain a portion 
of peritoneum or other transparent tissue from animals just slaughtered. 
In the lower animals the ciliary motion is-a very marked and frequent 
phenomenon. [It is chiefly by this that they procure food. It seems to con- 
tinue without cessation during the whole lifetime of the animal, and to be 
quite independent of anything like what we recognize as muscular tissue in 
the higher animals. So also is the curious pulsation in some of the 
Radiata, the extremely rapid contraction of the stalk of the Vorticella, and 
the protrusion of the pseudopodia of many other Radiata. All these, and 
many more that might be mentioned if time permitted, are manifestations 
of the power of life to produce motion in living protoplasm. 
The higher animals not only move about by means of their locomotory 
organs, but in every part of their bodies. there is a continual circulation of 
nutritive fluids, of secretions or of excretions, and there is continual motion 
of the organs of circulation, respiration, and digestion. In addition to these 
there is the motion produced by the rapid waste and renewal of tissue that 
is constantly going on in their bodies. í 
