Another type of soil for bacteria gardens

Boil some rice or potatoes in a dish unless well cooked. Drain and save the water. Use the bouillon cube to the gelatin. Use the similar type of dish and cover as was used above. Pour sufficient of the hot gelatine mixture into every dish to cover the bottom to a depth of 3 or 4 mm. quickly change the covers and let the dishes stand unless the gelatin has hardened. Tie the covers on and sterilize in an oven. Permit the dishes to cool and the gelatin to reharden before removing from the oven.