Gravity Determinations in Australia, 

 Table I. 



9S 



Observer. 



Baracchi-Love 

 V. Elblein 

 Guberth 

 Hecker 

 Alessio 



Type of 

 apparatus. 



cm. 



'sec. -2 



Weight. 



Diff. froni. 



wei<;hted 



iiieiiii 



Kater 



979 



•977 



- 0:5 - 



- -010 



V. Sterneck - 





•991 



- !• 



+ -004 



,, 





•997 



- 1- 



-+ -010 



Potsdam 





•985 



- 2- 



- -002 



„ 





•985 



- 1-5 - 



- -002 



Weighted mean: 979-987 

 Mean error: ±^0027 



Bernacchi's determination is omitted; Borrass also omits it. 

 Wright's determination is, apparently, not yet published. 



The data for the evaluation of g for the Sydney observatory are 

 given in Table II. 



Table II. 



Observer, 



Type of 

 apparatus. 



9 

 cm. sec. -2 





Weight. 



Diflf. from 



weighted 



mean. 



Smith 



- Kater 



979:687 



- 



1- 



+ -007 



V. Elblein 



V. Sterneck - 



•678 



- 



1 



- -002 



Guberth 



- 



•698 



- 



05 - 



+ •ois 



Budik 



- ,, 



•686 



- 



1^ 



+ •ooe 



ft 



~ >> 



•674 



- 



1- 



+ • 006 



Hecker 



Potsdam 



•681 



- 



2' 



+ -001 



Alessio 



- 



•675 



- 



1- 



- -005 





- 



Weighted 



mean: 979- 



680 





- 



Mean error 



+•0018 





Duperrey's determination (included by Borrass) is omitted, as it 

 was not made at the observatory. 



From Tables I. and II. we obtain the definite values: — 



For Melbourne Observatory: g = 979 987 ± OO27 cm. sec.-^ 

 For Sydney ,, 979680 iOOIg 



For difference: g (Mel b.) g (Syd.) =0 307 ± 003, 



Both stations are obviously well established, the mean errors 

 being quite small for results based on so many observations, and so 

 large a range of methods; Sydney observatory, indeed, takes rank 

 among the best established stations. Either would §erve the purpose 

 of a primary station for gravity survey. 



§ 4 Gravitational Anomalies. 



The additional figures required to obtain these anomalies are 

 given (except those for Perth) by Borrass {I.e.). Taking first those 



