50 



Observations Regarding Pettenkofer s Theory. 



[part l 



It contained, however, in most places more organic matter, and the specific 

 gravity of its solution was higher. 



Several specimens of soil were examined microscopically, but nothing could be 

 detected in the moistened soil for the first two or three days, presenting unmis- 

 takable evidence of vitality. Infusorial animalcules of many kinds gradually appeared, 

 but I could not state that any marked differences existed in the various specimens 

 observed. A figure of those which revived in some soil, from No. 2 married 

 quarters of the 5th Lancers, will serve to illustrate what these were (Fig, xcii). 



In one sample, however, some very interesting low forms of life appeared, 

 about which Mr. Huxley and Hackel have lately written so much. The test tube 

 in which this particular sample (from a depth of six feet in No. 2 barrack 

 occupied by Royal Artillery) was seen was fortunately a very thin one, and per- 

 mitted the use of a high power when placed on the stage of the microscope. 

 The bodies observed consisted of minute masses of translucent, colourless jelly, 

 without nucleus or contractile vesicle j in short, not the slightest evidence of 



