DearSir,—ln conforming with tho wishes of many who, by unavoidable cireninstances, were de prived of the pleasure of listening to your admira ble lecture on the " ATOMIC PHENOMENA OF NATURE,'' recently delivered in the Rev. Dr. Duncan'■ Cburch, lor the benefit of the Richmond Humans Asylum, and in behalf of themselves, the undersigned would respectfully request that you repeat, for yonr own emolument, that address, at such time and place as you may desire and name,