Vol. II. 



.If 



BATHOMETER 



PL A N. 



A . /?//<( ci'iiiiumi Mercury 



B . CorUraftetL Orifice 



C . Diaphragm 



D . Springs 



. Adjustment scrars 



F . 6-ow piece 



PLAM. 



(Excerpt- ?kl "S-ant . 1816.) 



Ret' J.Cook * Htmond. 



