52 



EYE SPY 



Various other blossoms respond in their own 

 particular virescent hues to the vapors of ammo- 

 nia, as the reader will discover upon experiment. 



The fumes of sulphur confined beneath a glass, 

 as from a few common, old-fashioned matches, will 

 play all sorts of similar pranks with the colors of 

 petals. A little experimenting in this direction 

 will afford many surprises. 



