A miniature Barograph by Richard Freres, in a hinged mahogany case, with glazed front window, nickel plated handle and catches and a lever to remove
A mahogany cased barograph with bevelled glass all round with a hinged lid. It has the usual stack of 8 evacuated bellows with altitude adjustment
A Barograph in a mahogany case with bevelled glass all round and drawer for new and used recording charts. Made circa 1910 probably by the
Antique Barographs, like antique barometers are scientific instruments. The purpose of both is to register the changes in atmospheric pressure. Antique Barographs record these changes on a paper chart, which is wrapped around a clockwork drum that rotates for one week. The charts are changed each week, and can be kept to compare weather from one year to the next.
Read more about Barometers and Barographs Weather Forecasting and Recording here.