--- a/slides/slides08.tex	Thu Nov 20 18:11:36 2014 +0000
+++ b/slides/slides08.tex	Fri Nov 21 01:20:51 2014 +0000
@@ -404,9 +404,9 @@
 \includegraphics[scale=0.37]{../pics/blockchainsolving.png}
 \end{center}
 
-\begin{textblock}{7}(7,10)
-10 mins
-\end{textblock}
+%\begin{textblock}{7}(7,10)
+%10 mins
+%\end{textblock}
 
 \end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
@@ -622,8 +622,8 @@
 
 \begin{itemize}
 \item the genesis block (a transaction without input of
-50 bitcoins)
-\item coinbase transaction (this is the reward of the
+50 bitcoins), or
+\item a coinbase transaction (this is the reward of the
 miner who validated a block of transactions in the blockchain)
 
 \end{itemize}