diff --git a/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 3.md b/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 3.md
index a66843251..541aa6d18 100644
--- a/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 3.md	
+++ b/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 3.md	
@@ -43,4 +43,7 @@ Left half only 1 minute count at 925 voltes 1cm R2
 15257 counts
 Question 3.1 we may not really have to do
 Exercise 3.4
+238.9 microseconds between pulses observed
+calculated was 236.2
 
+Now with the blank disk