32 

 Head of the care f u ijy collect and review all the information obtainable, 



Department of * ' 



Je raf rt to'th C H t0 anc ^ rfc P ort to the hydrographer any discrepancies for his de- 

 mographer any cisiou. He will direct the labors of the draughtsmen, and 



descrepancies in 



information. will be responsible for the correctness of their work. 



The field-work of surveying vessels or the detail accom- 

 panying any chart sent from other vessels will be given to 

 the head of this department for his revision or for the replot- 

 tingof the work, if necessary, and he will see that allfinal cor- 

 rections (of the chronometers, errors, and rates, soundings, 

 bearings, angles, &c), have been applied, or apply them. 



The head of the department will revise, and if necessary 

 recompute the astronomical observations for position and 

 the magnetic observations for declination. He will super- 

 intend the replotting, aided by the advice of the surveyor, 

 if obtainable, and is responsible for its correctness. He will 

 bring to the notice of the Hydrographer any incompleteness 

 or discrepancy in the field-work. 

 aii engraving, All the engraving, lithographing, photo-lithographing, 



&c in charge of &c., done in the Office, and outside of it, is under the super- 



the head of De- tit 



partment of vision of the head of this department, who will see that 



Drafting and En- ... .. t t • ,• ,. , i-r t , 



graving. the intentions and directions of the Hydrographer are car- 



ried out. He will read and correct all the proofs, and will 

 be responsible for the final correctness of the plates. He 

 will see that the plates, stones, &c, from which the charts 

 are printed, are always corrected to date from the Hydro- 

 graphic Notices and Notices to Mariners, as well as from all 

 other information received at this Office. 



The draughtsmen and engravers are under the immediate 

 direction of the head of this department, who will report 

 to the Hydrographer any neglect of duty on the part of any 

 of them." 

 touthogrlphin ^ Within the year 1871 the method of reproducing charts 

 office iucedinthe ^ ) y * ne P rocess °f "pbotolithographiog" was introduced in 

 the Office. Papers were issued on the u Northern and East- 

 ern limits of the Gulf Stream," translated from the German 

 of Dr. Peterman ; on the '' General Navigation of the Oceans 

 and the Mediterranean Sea," and on " The Marshall Group " 

 of islands in the Pacific; also a " List of Eeported Dangers 

 in the Pacific, north of the Equator," was compiled and pub- 



itheOm i ce tion80f ^ snecl ' ^ tbe six ty-six charts published twenty-two were 

 republications from the corrected plates of the North Pacific 

 Surveying Expedition, forty-three republications of foreign 



