M. DE Zach's j^Jlronom'ical Ohfervaiions. 



141 



True mid-day concluded by the fun's correfpon- 1 

 dent altitudes as the clock marked J 



Equation of the mid-day 



Retarding of the clock at the rate of i' 35" 1 

 per 24 hours - - - J 



True mid-day the pendulum clock fhould | 



have marked - - - J 



Mid-day concluded at the gnomon of the 1 



obfervatory . - - - J 



Difference, the error of the meridian line 

 or gnomon - - . 



the 

 i8th 

 Mar. 



II 48 42 

 - 18 



+ 13 



II 48 37 

 II 48 56 



19 



the 

 19th 

 Mar. 



// 



II 46 51 

 - 18 

 + II 



II 46 44 



II 47 3 



^9 



From thence I concluded. 



h. 



Mid-day at true folar time ii 5.9.60 

 Mid-day the clock flxould 1 ^ 



have marked on the 1 8th J ^ ^' 



Retarding upon true folar 

 time 



} 



T-l 23 



Mid-dayatequatedfolar time 12 8 15 

 Mrd-day the clock fhould \ o 



have marked on the i8thj ^ 3/ 



Retarding upon equated! 

 folar time *• J 



19 38 



Obfervstionj 



■v 



