393 SURVEY OP THE COAST 



rather be written in ink than in pencil, for greater distinct- 

 ness and better preservation, as it is proper to preserve them 

 at least till after all calculations are made, in oider to be 

 able to verify the fair copies by them, in case of any doubt. 



The method which I adopted in this respect is evident by 

 the exemplar given of it in these papers. I distinguished 

 the day book and journal evidently only to facilitate the or- 

 der of the work by sei)arate denominations. Every paa;e is 

 divided into six columns, which suit very well for all kinds 

 of observations and results, and the headings of which go 

 uniformly through the whole book. Not having my journals 

 of the actual work of the coast survey at my disposiiion, 

 the exemplars are taken from the similar operations made 

 for the determination of the boundary line between this coun- 

 try and Canada. 



The day book is kept by minute order of time. The re- 

 verse page of each leaf is destined for all the details of the 

 observations, and the direct page facing it for the immediate 

 results of them in all their details. The further particulars 

 may be seen in the exemplars themselves. 



The journals of results are two fold. One series of them 

 is destined for the vertical angles, with the heading, " Of 

 the repeating circle," though it contained vertical angles in 

 general. The other series contained the results of all ho- 

 rizontal angles, and was superscribed, " Of the great theodo- 

 lite," this being the instrument used. In these journals, the 

 order of the subject is the leading principle, and they subdi- 

 vide naturally, as seen in the exemplars at A and B. The 

 date in the first columns refers each result to its observation 

 in the day book. The next columns contain the resulting 

 lines and angles, ^'c. forming the element of the calculation, 

 of which all the particulars are introduced in separate co- 

 lumns, for the ease of the verifications. The final result 

 with the minute details may he seen in the exemplars. I 

 have not the opportunity of giving an exemplar for tlie ele- 

 vation of the terrestrial objects, signals, ^'c. over the sea, 



