🚀 go-pugleaf

Chris W. asked about a Macintosh font with the type of double arrow
used for equilibria expressions.

Two fonts that have this are Chem Font and MacChemistry font.

MacChemistry is/was sold by a private company, along with many
pages of graphics that are time savers for chemists preparing
educational material. What company and is it still in business?

Chem Font is one of 2 fonts distributed by Project Seriphim, an 
NSF funded project, run by Dr. John W. Moore. There is much information
about Proect Seriphim in older issues of the Journal of Chemical
Education, through which much of their software was distributed.
Current availability, I don't know. This price was right, however.

Jerry M., Bemidji State University, Bemidji, MN  {Brrr-midji :-) }