This is a reprint of an important Negretti & Zambra instruction booklet about barometers and barographs.Originally published in the late 1930's this 20 page manual describes the intricate workings of these instruments, how they operate and with methods of adjustment and setting. Of particluar interest are graphics showing how to interpret various movements of barograph chart recordings. 90mm x 160mm.
Free postage to UK mainland.