I knew there was a way to do this. I forgot the \nbsp, {} by itself does not work. Thanks for the reminder.

John

-----------------------------------
Professor John Kitchin 
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803

On Mon, Feb 29, 2016 at 10:19 AM, Roger Mason <rmason@mun.ca> wrote:
童俊翔 <tongjunxiang@gmail.com> writes:

> How to add left superscripts without using additional packages in org-mode?

I use \nbsp{}^{1}.

Cheers,
Roger