Barographs (2nd Edition) - Philip R. Collins Antique Barometer Book for sale the musician can turn the

the musician can turn the page by pulling down on a string attached to the front lever on the main case

To one side is a smaller wooden strut which supports two removable leather padded shoes which are sprung at the back to create a small amount of tension to the plate when it is put in motion

Other points on the brass conductor have dome type brass mounts on which brass chains can be hung to transmit the electrostatic charge to a Leyden jar or other experimental apparatus

a cased George IV altazimuth theodolite by Alexander Adie of Edinburgh

given the subject

Barographs (2nd Edition) - Philip R. Collins Antique Barometer Book for sale the musician can turn theIt was my aim to portray that most fascinating of instruments the barograph using illustrations as examples of the many different types still available. It became almost a detective hunt to trace their development, by inspecting existing instruments and consulting catalogues and patents. In the second edition of this invaluable reference guide, the author traces the development of the barograph from the earliest recording devices through their heyday