Wilbert Smith Archives Files Box 1130 16 1130-16-p071

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eee ais ts aaa aamaina eS balis ined. own this very ice- sible was oids. rwed ould vhere Ges that peed miles intal. vater ever, rvive pre- is in ‘ia in toid. 5 ice C8 wing ' H { i | | volatile materials will leave the porous shell of less volatile will begin where the more le matter slowly leaves the interior. The time required for the highly volatile matter to depart may be comparable to the time of descent, of the order of a fow minutes. 3. At lower altitudes the outer shell will be subject...