. An Account of the Magnetical Machine Contrived by the Late Dr. Gowin Knight, F. R. S. and Presented to The Royal Society, by John Fothergill, M. D. F. R. S. . thick; the fcrews paflingthrough the plank entered the bottom parts of the bracesA A. Againft the middle of the whole length, two ftrongbrafs plates are well fixed to the fides of the plank; tothefe brafs plates are fixed two cylindrical gudgeons f,which projecSting from the fides, like the trunnions of acannon, lye in the fockets of the ftandard g, wherebythe magazine eafily turns, as on an axis; and is fo wellpoized as to ftand in an
. An Account of the Magnetical Machine Contrived by the Late Dr. Gowin Knight, F. R. S. and Presented to The Royal Society, by John Fothergill, M. D. F. R. S. . thick; the fcrews paflingthrough the plank entered the bottom parts of the bracesA A. Againft the middle of the whole length, two ftrongbrafs plates are well fixed to the fides of the plank; tothefe brafs plates are fixed two cylindrical gudgeons f,which projecSting from the fides, like the trunnions of acannon, lye in the fockets of the ftandard g, wherebythe magazine eafily turns, as on an axis; and is fo wellpoized as to ftand in any inclination of the line ns ; andin this the equilibrium is aflifted by the ftrong maho-gany femi-circularpiecesLL, fixed in a vertical pofition toa the Dr. knights Magnetkal Machine. 599 the middle of the under part of the plank dd, on whichthe magnetic apparatus refts. The ftandards g are fixedto the fquare frame hh^ and the whole fupported on thefour trucks 11, whereby the two magazines are ealilybrought end to end, or fet at a convenient diftance, fo asto admit a bar k, to be placed between the ends, to bemade iflagneticaL XLIII, Jl ■£• .- 4,;i.
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