diff --git a/daily-notes/day20.md b/daily-notes/day20.md
index 10628dd..16211ab 100644
--- a/daily-notes/day20.md
+++ b/daily-notes/day20.md
@@ -523,7 +523,7 @@ Defense Crosses
  * No.
 * You can't answer the largest size of rocket one might use?
  * No.
-* Tne thousand feet?
+* Ten thousand feet?
  * A large one, maybe.
 * In terms amount of the energy, you'd need a lot of material.
  * I don't think so.
@@ -533,7 +533,7 @@ Defense Crosses
  * Yes. I'd note that an explosion is different from detonation. It a deflaration.
  * With explosives, you have a detonation.
  * Classic pipe bomb with black powder. It burns at less than supersonic speeds, but it still explodes.
-* Faster than teh speeds of sound?
+* Faster than the speeds of sound?
  * In that material.
 * There's a shock wave because it goes across the substance faster...
  * Yes.
@@ -647,7 +647,7 @@ Defense Crosses
 * How many batches would one have to do, given that lab equipment.
  * Quite a few... Could we got back to the pictures?
  * We have one liter beakers it seems on the left side. 
- * If you were courageous enough to make 200 grams at a time, that would be fifteen batches... A small batch would be fine grams.
+ * If you were courageous enough to make 200 grams at a time, that would be fifteen batches... A small batch would be five grams.
 * 200 grams is getting to a level that would be dangerous, for making it by hand... Where does it become more dangerous?
  * It depends on your experience, and your comfort.
 * What about you.
diff --git a/daily-notes/day21.md b/daily-notes/day21.md
index 9c94d0f..8330e67 100644
--- a/daily-notes/day21.md
+++ b/daily-notes/day21.md
@@ -34,7 +34,7 @@ Byron Trial Notes, Day 21 (Week 5)
   * Yes. I just use cold water.
 * To neutralize the acid?
   * Yes.
-* And in fact, any time you're working with an acid, it is a good safety precaution fo have a sodium bicarbonate solution on hand?
+* And in fact, any time you're working with an acid, it is a good safety precaution of have a sodium bicarbonate solution on hand?
  * Some people just use water...
 * Then you would purify it with methyl hydrate
 * And you wouldn't put it in type with a heating element?
@@ -598,13 +598,14 @@ Byron Trial Notes, Day 21 (Week 5)
 * You said you'd have to test them in designing efficient fuels...
  * Yes.
 * How would you do that?
- * I'd make it and take it to a 
+ * I'd make it and take it to a remote region to rest.
 * Would 500 grams be enough TATP to make a bomb?
  * Yes.
 * How much TATP do you need to be a bomb?
  * You'd need about 10 grams for a detonator.
  * ... If you were making a booster as well, 50 grams.
-* Can TATP go off if you 
+* Can TATP go off if you drop it?
+ * If it is in a container?
 * You said they could make three quarters kilograms of Amonium Nitrate... Is that a big explosion?
  * It could hurt people in a small space.
 * An explosive doesn't have to be for hurting people. It could be for blowing up a safe?