In the past few years I have built up a collection of old books and technical instruments from the 15th to 18th Century.
It's now time to sell my collection.
Scintific instruments are now for sale by this web site during 2014.
Dividers, Drawing Instruments, Surveying Instruments and others
Practical Geometry, Surveying, Tables
Very nice J.Kern Theodolit, mid 19th century currently on sale.