£*rploration of the Amazon.—About $ a year since, (be U, S. Government deputed Lieut. Hkrxden, of the Q. S. Navy, to rnaKe an exploration of the Amazon. Lieut ft. hu3 returned, after descending the Amazon forover3,000 miles from its head waters* which rise in the mountains of Peru. The N. T. Times gives the * fallowing' brief but interesting* notice o{ r this famous exploration, which will soon y I be laid before Congress, in all its details: . j Lieut, H. left Lhna% on the PnciCc coast, with u small parly of exploration, in the month ol May of hat year. At Tuomut a small city of Peru, situated between the cast and west ranges of the Andos, Mr. 11. divided his party, and directed his com} anionr Lardner ttiblpon, with a guide and servant, to proceed to Cuzco, and, penotmtihg eastward from that city., endeavor to* striu'e the headwaters of the “Purus/’ which is supposed to be navigable to that point. Fuillng in this, he was to luin south, and,passing through La Paz and Coca tiamba, inBos livia, embm k upon Mom ore, which is u ^ tributary of the great river Madeira, and j descending that river, join Mr. H. in Bar-[ ro de Rio Negro. Mr. H. himself turned none, and passing through tho great mining district, of Cerro. Pasco, and crossing the second range of thu Andes, between that p ace and Huanaco.cmbarh' ed upon the hoad-viters of the Huallaga the first great southern tributary of the Amazon. Descending fiora the mouth of this river h« entered the Ucuvali, the second gie-H tributary,and ascended some three hundred miles to tho missionary settlement of Sarayacu.Mr. Herndon crossed ilie Gorclilleru at the pass of Aniararvra, which, is by bTCtncliic measurement, 10,210 feet above tho level of the sen. He chon navigated in comes a distance of about four thousand miles, and arrived in Para on the Illh of April of this year. L-eut. H dn'-crilics his voyage as highly iriter-csiiri£i. and speaks w/th enthusiasm of tin* surpassing fertility and valualle natural productions of the countries lie passed through; ho found a fiuo and salubrious Himuie, and describes the river as rjwigabn* hr a draught of twelve feet, for at least three thousand miles.I VnPotaloe Culture.After ail that has been written upon the disease v.-hich hns beon for the past eight years so f.ual to tin* potatoe crop, any new theories, through a publication of so recent establishment of our own, I would surely not be received on the part 1 of nn invest Jgat.rg public. We shall therefore at this limo not submit any theory upon the subject, showing the j cause of the malady, but shall ratheri % A I