The Inspector of Grain at Detroit las wiitten a letter to the Tribune, n vljic-.h he says: Frorn appearances, thoro is danger that the advantnga attcnding the supe■ior yie'd of wheat ;n the State, will bo rittered away be carolessncss in c!eanrig. Oat of six car loada inspected sy me yesterJay, all of beautiful berry. five cara inspected No. 2, owing to he chew, coc-.kle, and other fon! stuff with whioh it wa? rtirxed. This differenco' in grarle iöVolved a differenoa of at least ten cents por bushei in tba valuo oi tho wheat - a los.s of on e h nlnd and fifijj dollars on tho lot ; yet thu labor required to clean it all would aot have co.it More than twelvë or fitteen dolliirs, while tha refuse stuff wouM have been worth $1 n bifndred for foed. In another case, w here the berry was as fine as I have ever seen, the ISot was found to bo nearly one third ohess, and I wps compellud to rejoct it eniirely. Tiiis species of negleot, should it generally prevail, will tnnko, in the Sggregate, nn immense diffürencf! in the ntiïount realized by tho Suite for this great staple, besides sacrifioing th'o reputation we vrere rapidly 2;airiing f r tho superior character of our whent.