Henry C. Adams

Capitolo 25

you/he/she would be taken, but to make more in clear way the diagram,
these have not been shown. The lines of sight are marked 1A,
1B, etc. The points marked A1, A2, etc. they point out the first one,
according to, etc. and subsequent positions of observer A;  the
stings B1, B2, etc. what it refers to observer B. Point-and-treats her
show of line the course taken by the craft that you/he/she has verified
after having drawn the various recorded observations.

It is very desirable to have on call a horse and trap to
you transport the observatories and their place tools to put as
in demand, and to every observer you/he/she should be furnished the small flags
approximately 2 fts square, a white and one blue, to signal
purposes.

The tools first has put on respectively to A1 and B1, and
repaired to read above to the point 1 predetermined where the
craft will have put Then in as soon as the boatmen have arrived
the neighborhood of this point, the observatories are able, from he/she wants to say of the
flags, direct them what way of rowing as to bring the boat to
the exact position required, and when this is made the anchor it is
allowed to fall until it is for starting now that you/he/she is signalled from the observatories
holding the flags right above of their heads. This is also the
signals used to point out to the men that the job of the day is
ended, and they can pick up the craft and you/they can start for house.

[The illustration: the Fig tree. 9.--PLAIN OF REENTERED COAST-LINE LLUSTRATING
METHOD TO TAKE CURRENT OBSERVATIONS WITH TWO THEODOLITESS.]

Directly the craft has put in the water, and to every peer
quarter of a, hour later every observer takes a reading of
his/her exact position and notes the time. Hardly the readings
the craft is taken to in position 2, the observer An owes
takes on his/her tool and you drive to A2, where he has to put on
ready to take reading 3 a quarter of a hour later to have read 2.
You will notice that it is probable that he would possibly have been able to
takes the reading 3 from the position A1, but the angle did from