G’day; Someone was asking about magnetic stirrers. In the '60s
it was almost impossible to get anything slightly unusual in NZ
(including money) - we were very isolated. But the Stage 1
Chemistry lab in the University where I worked needed a dozen
small, slow speed stirrers, urgently. So we managed to get a
dozen little electric clock motors, epoxied small, powerful
alnico magnets to the shaft, and fastened them into small
airtight plastic boxes. Next we found in a toyshop some 1"x1/8"
bar magnets which we sealed into Pyrex glass tube. So, put the
beaker/flask etc on the box, connect to the mains, put the
magnetic follower into the liquid in the vessel - and voila! - a
dozen magnetic stirrers in two days! But we didn’t get thanked;
it was part of the job.
/\ / / John Burgess, / / / //\ @John_Burgess2 / / \ \