SEEDS 51 



size of the seeds? Why? Pjnch the seed. Does any water 

 come out ? If so, where ? 



Conclusion. State what is the effect of soaking seeds ; 

 also what changes take place and where the water probably 

 gets into the seed. 



35. EFFECT OF SOAKING 

 Object. To study the effect of water on dry seeds. 

 Apparatus. Seeds as in the preceding Experiments. 



Method. Weigh a given number of the seeds dry. 

 Then place them in a beaker and cover them with water. 

 Let them stand over night. Then remove them, dry them 

 with blotting paper to remove superfluous water, and weigh 

 them again. Have they increased in weight as well as in 

 size? How much? 



Conclusion. State what is the effect of soaking on the 

 weight of seeds. 



36. SEEDS EXERT PRESSURE 



Object. To show that seeds in absorbing water exert 

 pressure. 



Apparatus. Bottles of any sort (the square or flat-faced bottles 

 of thin glass are very good for the purpose), beans or peas. 



Method. Fill the bottles with dry seeds. Add water 

 enough to fill up the spaces around the seeds in one bottle. 

 Leave the other as control. Cork the bottles and allow them 

 to stand. After three hours note the result. If the cork has 

 been pushed out or if the bottle has been broken, what does 

 the experiment show? If the bottle remains intact, remove 

 the cork and try to shake out the seeds by inverting it. 



Conclusion. Inference from this experiment. 



