THE SEED AND ITS GERMINATION. T 
of a tumbler, and add just water enough thoroughly to soak the paper. 
Pour out any excess. Place on the paper a few seeds (peas, barley, 
wheat, oats) that have been soaked for 24 hours; cover to prevent 
evaporation and put the tumbler in a light_place. 
Put the same number of other seeds of the same sort in a cup or box 
which will not admit light. 
Add a few drops of water from time to time, if the seeds or paper 
seem to be drying. Place the cup and tumbler side by side, so that they 
will have the same temperature, and watch for results. 
Tabulate your results something like this: 
No. of seeds sprouted in 24hrs. 48hrs. 72 hrs. 96 hrs. 
In dark, wae 
In light, ey ee ew eee 
N. B. — Take special pains to have the conditions of moisture and heat 
the same in the cup and in the tumbler. 
'9. Experiment 2. Relation of Temperature to Germination. — 
Arrange several vessels asin Exp. 1. Put in each vessel the same number 
of soaked peas.! Stand the vessels with their contents in places where 
they will be exposed to different, but fairly constant, temperatures and 
observe the several temperatures carefully with a thermometer. The 
following series is merely suggested, — other values may be found more 
convenient. Note the rate of germination in each place and record in 
tabular form as follows: 
No. of seeds sprouted in 24hrs. 48hrs. 72hrs. 96hrs._ ete. 
At 52 degrees, ee sa a —_- —s- ——— 
At 50 degrees, —— —-- — —$> ss ——— 
At 70 degrees, — — — —_—> Ss ———— 
At 90 degrees,? a a aa —_-—- —— 
° 10. Experiment 3. Relation of Water to Germination. — 
Arrange seeds in several vessels as follows : 
In the first put blotting-paper that is barely moistened: on this put 
some dry seeds. 
*1Tf peas are used one year, Indian corn another year, squash-seeds another, and 
so on, a series of data will be obtained which may be quoted to the class after the 
experiment as above given has been completed. 
» 2 Here and elsewhere throughout the book temperatures are expressed in Fahren- | 
heit degrees, since with us, unfortunately, the Centigrade scale is not the familiar 
one, outside of physical and chemical laboratorfes. 
* 8 May be a home experiment. 
