. Glasgow mechanics' magazine; and annals of philosophy . out its defects. NOTICES TO CORRESPONDENTS. We can hardly give T. L. an answer without seeing the papers he alludes to. If he will favour uswith a sight of some of them, with his name, if found to suit we may treat with him. We are sorrythe insertion of Mr. W. Ballintynes communication has been delayed, but we beg to assure him it wasunavoidable. It will appear immediately after the New-Year. We must also apologize to ,Hanover Street, for delaying him likewise until another time. Published every Saturday, by W. R. MPhun, 155, Tronga


. Glasgow mechanics' magazine; and annals of philosophy . out its defects. NOTICES TO CORRESPONDENTS. We can hardly give T. L. an answer without seeing the papers he alludes to. If he will favour uswith a sight of some of them, with his name, if found to suit we may treat with him. We are sorrythe insertion of Mr. W. Ballintynes communication has been delayed, but we beg to assure him it wasunavoidable. It will appear immediately after the New-Year. We must also apologize to ,Hanover Street, for delaying him likewise until another time. Published every Saturday, by W. R. MPhun, 155, Trongate, Glasgow, to whomCommunications (post paid) must be addressed. CURLL, PRINTER. THE MECHANICS MAGAZINE, CONDUCTED BY A Committee of Civil Engineers and Practical Mechanics, For, lo! with modest, yet majestic grace,I curb imaginations lawless rage;And from within the cherished heart to trace,Philosophy appears. No. CVI. Saturday, ^Ist December, 1825. Price 3</. ^^ JHYbROMETROGRAPH: OR, MACHINE FOR MEASURINGWATER OR ANY OTHER FLUID. Fiq^. Vol. IV. ? a 306 THE GLASGOW DESCRIPTION OF A HYDROMETROGRAPH, OR A MACHINEFOR MEASURING AND RECORDING THE QUANTITY OFWATER, OR ANY OTHER FLUID, DISCHARGED WITHIN AGIVEN TIME FROM CONDUIT PIPES. Invented by the Chevalier Joseph be Baader, of Munich, in the Kingdom of Bavaria. [From Gills Technical Repository.]The first idea of the Hydrometro- fluid be perfectly uniform and con- graph was conceived by the ChevaHer, and communicated by him tovarious persons in Bavaria, manyyears since. It arose from thegenerally acknowledged want of anexact measure for the quantities ofsalt water delivered and employedin different parts of the extensiveRoyal Salt-works at Reichenhalland Traunstein, with the manage-ment of which he was entrusted,and where the quantities of brinecould only be computed, by theordinary means, in such an imper-fect manner, that errors of one-halfthe quantity passed could neither beavoided nor detected. The means forme


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