XXXV. Of the Echo; Line of Incidence and Re- XXXVI. The same Subject continued; Echoes at Glasgow, Brussels, Thornbury Cas. tle, Milan, &c. Echo applied to mea- suring inaccessible Distances; Whis- pering Gallery at St. Paul's; Musical XXXVII. Of the Winds; Smoke-jack, Trade Winds, &c. Experiments; Storms; Ve. locity of Wind; Table The same Subject, and Papin's Diges ter; Whitbread's Brewery; Accidents XLI. Of the Barometer; Fluctuation of the Mercury; the Vernier; Rules for predicting the changes of the Wea |