A. Altitudes measured with the Altazimuths. 



Observer: Lieutenant Scott-Hamen, when not otherwise stated. 



The small instrument, which was but seldom used on board, is indicated by the 

 circle-reading only to tenths of a minute. 



The date here given is astronomical, the hours being counted from Noon of a meridian 

 not very different from that of Greenwich (the chronometer Hohwv, being about 40 minutes 

 in advance of Gr. M. T.). Owing to the great eastern longitude of the ship during the 

 most part of the voyage the civil date on board was very often greater by 1 than that 

 here given. 



The position of the observer before the ocular is as a rule not stated in the original, 

 but may be inferred from other considerations and is added here in the column "Oc." in 

 order to facilitate the application of the level-correction. The level-reading is reproduced 

 here as given in the original; the correction to the circle-reading is in the direction 

 Right Left, the sign of which may be concluded from the above remark. 



As to the approximate bearing of the star it may be remarked that when the circle- 

 reading is between 270 and 360, the object glass was to the right of the observer, 

 standing before the ocular; when between O 9 and 90 to the left. (In the case of the 

 small instrument, whose zenith-point is about 180, the corresponding limits are 90 9 180' 

 for the right, and 180 270 for the left). 



The two columns of circle-reading correspond to the two microscopes (or verniers for 

 the small instrument). For the great instrument each number of seconds is the mean of 

 two or sometimes three readings, corresponding to adjacent divisions of the circle. 



The two last columns before "Remarks" give the comparisons between the chrono- 

 meter Hw and the observer's watch, in some cases supplemented from the Journal of daily 

 comparisons. 



See also explanation to List B (sextant-observations). 



