For the Hert!d. i*Hlr of the Mterfcftn^e** Institute* l am surprised to find no notice taken by the periodica! press of our city of ihe interesting exhibition now in progress at the cetiht of Fourth and Walnut. In the hope that it may interest others* I propose to say how it has interested me.The articles for exhibition here which com prdteticf almost every variety of manufacture* useful and ornamental, are arranged in four rooms up stairs, and the great lecture room on the lower fl«»or of the Cincinnati College.I shall begin with the useful and close with the ornamental, in both of which classes, I include the ladies, whoso presence here at every where, is one of the greatest attractions, and, without which, neither the world at large, nor die Mechanics Institute Exhibition, which is an epitome of that world, could possibly get along fur five minutes*On entering one of the upper rooms, the first object which strikes the visitor is a pair of fancy hydrants, of superior construction, offered by Mr. Perry J. Moore, the frames of indestructible! locust, the metal work of polished brass— a handson e and serviceable article, and cheap at the labeled price.No. ‘I. A lot of yellow pottery, from N. Kendall, neat and substantial, and in every variety, frlim an immense lemonade bowl to the mug which serves to dip it out. Everything here to please the most fastidious, except the lemonade.No. 3. An ingenious and serviceable, move-able and fireproof Iron window shutter which rolls up on a cylinder by daylight, and forma when letdown, a barrier which defies the midnight incendiary and burglar. Mr. Johnson, the inventor, received the stiver medal of the American Institute at their exhibition af New York, in October last, as a testimony of its value.