then one at once; Or with their superficies. But these cases
are rare.

3 In all reflections of any bodies w^th | w^t | ever this rule is true
that y^e co ^m on center of t [i] |w|o or more bodies changeth
not its state of motion or rest by y^e reflection of those
bodies one amongst another.

4 Motion may be lost by reflection. As
if two equall [bodies] Globes A & α w^th equall
motions from D & δ done in the perpen-
dicular lines DA & δα, hit one another
when the center of y^e body α is |in| y^e line DA.
Then y^e body A shall loose all its motion &
yet y^e motion of α is not doubled. For com-
pleting y^e square Bβ, y^e body α shall move in y^e Diagonall
αC, & arrive at C but at y^e same time it would haue ar-
rived at β w^th out reflection. see y^e third section.

5 Motion may be gained by reflection. for if y^e body
For if the body α return w^th y^e same motion back again from
C to α. The two bodyes A & α after reflection shall regain y^e
same equall motions in y^e lines AD & αδ (though backwards) w^ch
they had at first.