▁Johann ▁Wilhelm ▁L ür sen ius ▁( d ied ▁around ▁ 1 7 7 0 ), ▁both ▁of ▁whom ▁were ▁part ▁of ▁the ▁academic ▁component , ▁got ▁special ▁instructions . ▁The ▁a cademy ▁directed ▁all ▁the ▁research ers ▁to ▁prepare ▁reports ▁about ▁the ▁state ▁and ▁the ▁results ▁of ▁the ▁expedition ▁in ▁Russian ▁and ▁Latin . ▁The ▁academic ▁component ▁of ▁the ▁expedition ▁was ▁provided ▁with ▁many ▁astronom ical , ▁ge odes ic , ▁and ▁physical ▁meas uring ▁instruments ▁to ▁purs ue ▁its ▁research . ▁ ▁The ▁governor ▁of ▁Si ber ia ▁and ▁the ▁various ▁local ▁authorities ▁were ▁ordered ▁to ▁provide ▁the ▁research ers ▁all ▁the ▁aid ▁they ▁required . ▁ ▁The ▁voy ages ▁of ▁the ▁three ▁groups ▁( 1 7 3 3 – 1 7 4 3 ) ▁ ▁The ▁academic ▁group ▁ ▁The ▁two ▁Pacific ▁divisions ▁of ▁the ▁expedition , ▁led ▁by ▁Martin ▁Sp ang berg ▁and ▁Vit us ▁Ber ing , ▁left ▁St . ▁Petersburg ▁in ▁February ▁and ▁April ▁ 1 7 3 3 , ▁while ▁the ▁academic ▁group ▁depart ed ▁on ▁August ▁ 8 , ▁ 1 7 3 3 . ▁In ▁addition ▁to ▁the ▁Academy ▁members ▁G mel in , ▁Müller ▁and ▁C roy ère , ▁the ▁group ▁also ▁included ▁the ▁Russian ▁students ▁Ste pan ▁Kr ash en inn ik ov , ▁Alex ei ▁G rol an ov , ▁Lu ka ▁Ivan ov , ▁Wass ili ▁T ret jak ov ▁and ▁F y odor ▁Pop ov , ▁the ▁transl ator ▁( also ▁a ▁student ) ▁I ly a ▁Ja onto