Clearly, our agricultural I^bor system is j bow the chief concern ; and, while it must he j true th t time will have to contribute much to j the settlement of the questions arising out of j emancipation i it is also true that at ten ion cannot be too earnestly directed towards every scheme which seems to promise the deliver* cnee of our planters out of state of dependence, and the rescue of our lands from the encroaching jungle.The Picayune informs us that an enterprising firm in New Orleans, having abundant means and foreign connections, besides being familiar with the whole business of Coolie imperil on, recently addressed Mr. Seward on the subject. Their communication was referred to the Bureau of Immigration, which replied thut the Coolie trade was prohibited by an act of Congress of 1862, which makes it a severe penal off nee for our registered ships to engage in the deportation of Chinese to any foreign port, with a view of holding them to servitude, or as laborers for a term of years. But the same act provides that no obstacle shall be offered to the voluntary immigration of the Chinese, and as a proof of the* voluntary character of the deportation, it requires a t*‘*rtifieate of the United States Consuls in China,It is universally known that the introduction of Coolies alone saved some of the West India islands from destruction as a result of cxnauiiimticm; but It Is also known that their introduction among the blacks is attendedwith tioublesome and dangerous nuarrels and fights. Their value as laborers, intrinsically, is admitted; still, like the Picayune, we feel the need of more detailed information from the countries where they have been used, as well as of a discussion concerning the changes in our law- which their introduction would re--tpuire, and the probable effects upon our social 'welfare