114 



THE FLOATINO-MATTER OF THE AIR. 



than others. They had been all at first alike in colour. 

 Out of the thirty tubes four only were free from mould. 

 Three of these were adjacent to each other, the fourth 

 at a distant portion of the tray. 



The Penicillium was exquisitely beautiful. Its 

 prevalent form was a circular patch made up of alternate 

 zones of light and deep green. In some cases the liquid 



Fig. 9. 27th Oct., 6.30 P.M. 



QC)QQ «QOOOO 

 |00 





o 

 o 





Muddy. 



Slime. 



Cloudy. 



© 



SUme and mould. 



Green. 



o 



Clear. 



was covered by a single large patch ; in others there 

 were three or four patches, each made up of its dif- 

 ferently coloured zones. Reticulated patterns also 

 occurred. Three kinds of Penicillium seemed strug- 

 gling for existence, namely : — that just described ; a 

 second kind, of the same consistency and colour, but 



