🚀 go-pugleaf

According to Thomas S. Zemanian <ts_zemanian@pnl.gov>:
> In article <20JUL199513002157@orion.cmc.uab.edu>, mann@orion.cmc.uab.edu wrote:
> 
> > What is a good way to transport liquid nitrogen (inexpensively) ,
> > about 20 miles.  It has to be taken from our laboratory to a 
> > High School classroom.  Remember it is very hot and humid in 
> > Alabama this time of year. 
> > 
> > Our goal is to do this without having to buy an expensive dewar flask.
> > 
> 
> A thermos _is_ a dewar flask.  See if you can round up enough for the trip.
> 
> Oh, and _don't_ screw the top onto the thermos to make a seal.  You'll
> need to allow boiloff, so you don't build up pressure in the thermos and
> cause it to explode.


In our lab we use cheap, hardware store thermoses as dewars, but we
file off the threads on the cap and bottle.  This guarantees that
no one will screw on the cap, and keeping the lid on keeps the 
N2 from boiling off a little longer.


Pete