17. 
iber 
19. 
THE LEMON 81 
you yourself move away until the light strikes it 
just right, you will see that the spray floats on the 
water in large, flat drops. 
Let us now test oi/ and see how that behaves. 
[The teacher performs the following experiments rapidly and asking 
no questions ; the pupils observing. ] 
(a) On several pieces of white paper drop one or 
more drops of oil. Hold these up to the light, 
then pass them around the class.’ 
(0) In several glasses of water drop a single drop of 
oil. Set these glasses in convenient places and 
let groups of pupils gather around and examine.! 
(c) Taking a drop of oil on a hat pin or wire, hold 
it in the flame of an alcohol lamp and burn it; 
then a second drop in the flame of a match and 
bury. 16; 
The lemon spray did two things the same as the 
oil—what were they? Will it do the same when 
it burns? 
[The teacher makes the test first; pupils watch, and as convenient, 
repeat. | 
Let the spray fly through the flame of the alcohol 
lamp. What happens? 
1 The teacher should at the same time say, “This is what oil does when dropped 
on paper”; or “when dropped on water’; or “ when placed in a flame.” 
NATURE STUDY —6 
