The Owner, through the Architect, may from time to time, by written instructions or drawings issued to the Contractor, make changes in the above-named Drawings and Specifications, issue additional instructions, require additional work or direct the omission of work previously ordered, and the provisions of this contract shall apply to all such changes, modifications and additions with the same effect as if they were embodied in the original Drawings and Specifications. Since the cost of all such changes is to merge in the final cost of the work, Articles 24 and 25 of the General Conditions of the Contract are annulled, unless elsewhere especially made applicable.