number 6, twenty-four per cent; number 7, eight per cent; number 8, five per cent; number 9, three per cent; number 10, two per cent—in whole percentages.

6. The energizing types. Not all worlds are alike in the manner of taking in energy. Not all inhabited worlds have an atmospheric ocean suited to respiratory exchange of gases, such as is present on Urantia. During the earlier and the later stages of many planets, beings of your present order could not exist; and when the respiratory factors of a planet are very high or very low, but when all other prerequisites to intelligent life are adequate, the Life Carriers often establish on such worlds a modified form of mortal existence, beings who are competent to effect their life-process exchanges directly by means of light-energy and the firsthand power transmutations of the Master Physical Controllers.

There are six differing types of animal and mortal nutrition: The subbreathers employ the first type of nutrition, the marine dwellers the second, the mid-breathers the third, as on Urantia. The superbreathers employ the fourth type of energy intake, while the nonbreathers utilize the fifth order of nutrition and energy. The sixth technique of energizing is limited to the midway creatures.

7. The unnamed types. There are numerous additional physical variations in planetary life, but all of these differences are wholly matters of anatomical modification, physiologic differentiation, and electrochemical adjustment. Such distinctions do not concern the intellectual or the spiritual life.

The majority of inhabited planets are peopled with the breathing type of intelligent beings. But there are also orders of mortals who are able to live on worlds with little or no air. Of the Orvonton inhabited worlds this type amounts to less than seven per cent. In Nebadon this percentage is less than three. In all Satania there are only nine such worlds.

There are so very few of the nonbreather type of inhabited worlds in Satania because this more recently organized section of Norlatiadek still abounds in meteoric space bodies; and worlds without a protective friction atmosphere are subject to incessant bombardment by these wanderers. Even some of the comets consist of meteor swarms, but as a rule they are disrupted smaller bodies of matter.

Millions upon millions of meteorites enter the atmosphere of Urantia daily, coming in at the rate of almost two hundred miles a second. On the nonbreathing worlds the advanced races must do much to protect themselves from meteor damage by making electrical installations which operate to consume or shunt the meteors. Great danger confronts them when they venture beyond these protected zones. These worlds are also subject to disastrous electrical storms of a nature unknown on Urantia. During such times of tremendous energy fluctuation the inhabitants must take refuge in their special structures of protective insulation.

Life on the worlds of the nonbreathers is radically different from what it is on Urantia. The nonbreathers do not eat food or drink water as do the Urantia races. The reactions of the nervous system, the heat-regulating mechanism, and the metabolism of these specialized peoples are radically different from such