. Encyclopaedia; or, A dictionary of arts, sciences, and miscellaneous literature; constructed on a plan, by which the different sciences and arts are digested into the form of distinct treatises of . the fide aj or morning hours, you movethe fcale of latitudes and hours to the other fide c e,orafternoon fide, and place the to ji° 32asliefore, and pufli down the hours, quarters, &c. anddraw the lines through them for the afternoon hours,which is clearly reprtfcnted in the figure. In like manner is an erefl north or fouth dial drawn(fee fig 2.), the operation being juft 1
. Encyclopaedia; or, A dictionary of arts, sciences, and miscellaneous literature; constructed on a plan, by which the different sciences and arts are digested into the form of distinct treatises of . the fide aj or morning hours, you movethe fcale of latitudes and hours to the other fide c e,orafternoon fide, and place the to ji° 32asliefore, and pufli down the hours, quarters, &c. anddraw the lines through them for the afternoon hours,which is clearly reprtfcnted in the figure. In like manner is an erefl north or fouth dial drawn(fee fig 2.), the operation being juft 1 he fame, oidyreverting the hours as in the figure, andnurking ilieanglesof the fliles Iicight equal to the complement ofthe latitude. This trigon may be likewife iifcd for drawing verti-taldediniug dials (fig. 3.), as itis wiih the.(awefacilityapplied to thclines AQ__. G B, and tlie hours and quar-ters marked off as before directed. Mr Jones graduates on the fcale B D of the tri-gon a line of chords, which is found nfclul for layingoff the neceffary angles of the fliles height. Thefcales of this trigon, vvhennot inufe,lie very cloli: toge-ther, and pack up into a portable cafe for the poc-ket. DIA-. Pl:ii*- CLXI .
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Keywords: ., bookcentury1700, bookdecade1790, booksubjectencyclo, bookyear1798
