— i — 



tho fickleness of the weather, pociiliiir to the metenrolopy of the snuthorn 

 summer of tliia country, much iucouveniciico was folt in milking tho oslru- 

 nomical observations. 



'I'lio heipht of tho knife-C(l>^o of tho penduhim iilxtvo (ho level of tho sea 

 was found to ho about 0.(5 metres and tho latitude of iho pliico was determined 

 by Mr. Tauakadutc to bo about 



31" 35'i north. 



Accoriling however to tho map published by tho Naval Department, the same 

 placo is situated at 



31° 31' 2"-8 north latitude. 



This difference of about I'l is far too great to bo tolerated in such deter- 

 minations. Tho data from which tho Navy map had been compiled seems lo 

 have been furnished by tho oflicers of "His Majesty's Ship, Teil)<)kan". IJut 

 in spite of the determination having been mndo bj' professional men, wo ar» 

 inclined to think that their result is not very trustworthy. At any rate it is 

 quite irreconcilable with our determination as obtained with tho aid of the 

 IJerlin Jahrbuch. 



AVo arrived at Kagosliima on the 27th of July and after a successful 

 series of observations proceeded to Naha which we reached on August 18. 



At Naha, through the kindness uf tho Director of tho Normal School, 

 wo obtained a room in every wa}' well fitted for our perpose, except that it 

 was freely traversed by currents of air and sensitive to atmospheric changes of 

 temperature. Tiio former evil was easily remedied ; and tho latter was of little 

 account as tho temperature change for a whole day even was only a few degrees. 



The pendulum, the chronograph and the chronometer were all set up in 

 this room. 



Several rectangular blocks of stone of nearly one metro in length and 

 somo 30 centimetres in breadth and thickness were piled up (irmly, to tho 

 height of about 1 \ metres. On this rough but solid pillar tho iron bar was 

 placed, and tho experiments were made in tho usual manner. 



'i'lie astronomical observations were taken in the yard in front of tho rwim, 

 where a similar but smaller pillar had been erected. The weather was showery 

 and uusettled and rendered the operations very difficult. 



'J'he latitude of the placo was determined by Mr. 'J'anakadate to bu 

 2G° 12' G' north. The height of the position of the j>endulum from tho sea 

 level was not accurately determined, although it was certainly nf)t more than 

 Ü metres. Any correction duo to such a small height is far within the errors 

 of experiment and may be neglected. 



Every thing went on as well as could bo expected, and after completing 

 tho experiment, wo left Naha on tho 23rd of August. 



