6 A. TANAKADATE. 



The selection of station was done by what was called the 

 forerunner " Senpatu-in '' who came to the place a day or half 

 before the rest of the party and made necessary examination 

 and arrangements. Stations were taken with the usual precau- 

 tion against disturbances from buildings, railways, iron bridges, 

 electric plants, factories &c.; care was also taken with regard to 

 the permanency of its surroundings in order that observations 

 may be repeated in future at the same place, although there 

 must be allowed a large margin of uncertainty in this respect. 

 PI. LX to PI. LXXXVII are topographs of stations. The 

 objects to be represented for the identification of places are so 

 various that the uniformity of scale and orientation could not 

 be followed ; in most cases they are sketches taken by the 

 observers and are to be looked upon as mere substitutes for 

 verbal description. 



No member of the party was specialized to take any par- 

 ticular kind of work, on the contrary each had to do all the 

 operations by regular turn including even the business part of 

 acting as the forerunner above spoken of. This was insisted on, 

 not on account of equal sharing of labour but for the object of 

 eliminating personal errors of observations and peculiarities of 

 manipulation which were likely to be thus discovered. This 

 gave also the party the power of continuing its prescribed work 

 even if it be reduced to one person through accidental failure 

 of the rest, which unfortunately happened more than once during 

 the survey. 



In the last two years of the survey, besides making regular 

 sets of observations in the tent, observations of dip and horizontal 

 intensity by vibration only were made at two or three points in 

 the neighbourhood, under the protection of a parasol from 



