LEADER 02024nam 2200337 n 450 001 996390464303316 005 20200824120613.0 035 $a(CKB)4940000000099902 035 $a(EEBO)2248498502 035 $a(UnM)99830786e 035 $a(UnM)99830786 035 $a(EXLCZ)994940000000099902 100 $a19950908d1681 uy | 101 0 $aeng 135 $aurbn||||a|bb| 200 03$aAn appendix to my essay to gunnery$b[electronic resource] $eOr, distances and heights may be found accessable or inaccessable one mile two or three without the help of geometrical protraction. Arithmetical or trghonometrical calculation. By a small instrument in the form of a two foot joynt rule, with a slider and sights, fitted to any mean capacity, that knoweth little of either writing or reading. And for those that are more learned, there is a secter line of cords to 180 degrees, by which all angles may be taken, either for distances of surveying, and a tangent line for altitudes, shewing more at large the multiplying of fractions and the rules of practise in decimals, with the way of extracting the square root. Invented, published, and the use thereof taught by William Walgrave dwelling at the two White Posts in Newton street near little Queen street in St. Giles's in the Fields. The instrument is made and sold, and the book shewing the use thereof, by Mr. Walter Hayes near the Popes Head Tavern in Morefields, London 210 $aLondon $cprinted by H. Brugis for the author and R. Pyne$d1681 215 $a55, [1] p., [1] leaf of folding plate $cill 300 $aReproduction of the original in the British Library. 330 $aeebo-0018 606 $aMathematical instruments$vEarly works to 1800 615 0$aMathematical instruments 700 $aWalgrave$b William$01012313 801 0$bCu-RivES 801 1$bCu-RivES 801 2$bCStRLIN 801 2$bWaOLN 906 $aBOOK 912 $a996390464303316 996 $aAn appendix to my essay to gunnery$92349757 997 $aUNISA