314 



HYDROGRAPHICAL SURVEYING [chap. xiii. 



Before P. M. Observations. 



h. m. sec. 

 Hardy .. . . 8 06 22-5 



Mercer .. . . 2 01 28-0 



After P.M. Observations. 



li. in. 8ec. 

 Hardy .. . . 9 50 09-5 



Mercer .. . . 3 44 58-0 



04 54-5 



Retardation for side- 

 real interval since 

 first comparison 



Mercer slow on Hardy, 

 allowing for accel- 

 eration of sidereal 

 time 



54-721 



6 03 59-779 



Retardation for side- 

 real interval since 

 first comparison 



Mercer slow on 

 Hardy, allowing for 

 acceleration of 

 sidereal time 



05 11-5 



1 11-722 



G 03 59-778 



Solar interval between first and second a.m. com- 

 parisons 



Solar interval between first a.m. comparison and 

 time of middle sight of a.m. series 



Mercer slow on Hardy at first a.m. comparison 

 second „ » 



•064 X 1-333 



1-616 



Acceleration for solar interval between first a.m 

 comparison and time of middle sight of a.m. series 

 Ih. 19m. 57s. 



Worked -up comparison at time of middle sight o 

 a.m. series 



Solar interval between first and second p.m. com 



parisons 

 Solar interval between first p.m. comparison and 



time of middle sight of p.m. series 



Mercer slow on Hardy at first p.m. comparison 



second ,, ,, 



li. m. sec. li. 



1 .36 59-5 =1-616 



1 19 57 =1-333 



6 03 59-5 

 6 C 3 59-564 



0-06J 



: 00-052 



6_03_59;500 

 6 03 59-552 



13-138 



6 04 12-690 [a) 



h. 

 1 43 30 =1-725 



12 32 =0-209 



6 03 59-779 

 6 03 59-778 



0-001 



0-001 X 0-209 

 1-725 



Acceleration for solar interval between first p.m. 



comparison and time of middle sight of p.m. 



series. 5h. 45m. 37.s. . . 

 Worked - up comparison at time of middle sight 



of p.m. series 



(a) 



{b) 



Mercer slow on Hardy at approximate noon 



00 00-000 



6 03 59-779 

 6 03 59-779 



56-770 



6 04 56-549 {h) 



6 04 12-69 



6 04 56 - .55 



6 04 34-62 



