Show i Odd Instrument I Is Used Ue I f f r 1 as Roof Pitch Finder Fand I A folding instrument which mess meal me I SINS res the angle anle from tram the horizontal I j and the tho Inches of pitch to the horizon horizon- L i j tRl to foot Is 18 s now In us use UI The Th device when open consists of radial arms anDI and an arc the whole frame ci a cut of ot pie Pivoted at the center or point of the pie U II a pointer arm bearing a spirit level When the user of the Instrument de de- sires to ascertain the pitch of a roof roOt or an any sloping eloping surface he b. rests ruts one edge ede oC ot the pie on 00 the surface moves moul the pointer up until ha he centers the spirit level bubbles and under the pointer r ron on the circular edge willbe will willbe the tade b be the pitch ST M and ud the number of Inches m. m measured meal meas sired aloo along the surface that would b set st off oil b by perpendiculars rilla rising riling from either ither extremity of ot a line a foot long lone longset longst st set beneath the surface When not r In me use the tie Instrument Is folded up Into compact form In such uch a w way that J the spirit level I Is surrounded surround b by th the I I different metal parts pam and aad thus thu completely com mm- protected PI |