Today I added web pages for the US instrument suppliers Dietzgen and Keuffel & Esser (K & E).  Though they were both primarily suppliers of drafting equipment and surveying instruments, they did supply a limited range of meteorological instruments which occasionally turn up for sale.  I posted a few extracts from some of their catalogs showing the meteorological instruments, the entire catalogs are about 500 pages long.  I will be adding more catalog extracts over the next few weeks.