25. Access to Work and Other Contractors. The Commission and its engineers, agents and employees may at any time and for any purpose enter upon the work and the premises used by the Contractor, and the Contractor shall provide proper and safe facilities therefor. Other contractors of the Commission may also when so authorized by the Engineer, enter upon the work and the premises used by the Contractor for all the purposes which may be required by their contracts. Any differences or conflicts which may arise between this Contractor and other contractors of the Commission in regard to their work shall be adjusted and determined by the Engineer. 26. The Contract. It is understood and agreed by the City and the Contractor that the terms of this contract are embodied and included in the Advertisement, Information and Instructions to Bidders, Proposal, Specifications of every nature, the Bond and the contract drawings hereto attached. These few articles have been given as examples of some of the essential subjects to be treated in general specifications. It is to be understood that these examples do not represent a complete set of general specifications and items have been omitted the absence of which in a complete contract might be injurious to the successful completion of the work. =114. Technical Specifications.=—These ordinarily follow the general specifications and have to do with the quality of materials, the manner of putting them together, and the method of doing the work. The subject headings in the Technical Specifications on the Baltimore Sewerage Commission are: Excavation Tunneling Rock Excavation Sheeting Sheet Piling Sheeting and Bracing Piles Blasting Pumping and Drainage Foundations Refilling Repaving Underdrains Buildings Inlets and Catch-Basins Cement Mortar Concrete Brick Masonry Reinforced Concrete Vitrified Pipe Concrete and Brick Sewers Vitrified Pipe Sewers and Drains Manholes Iron Castings House Connections Obstructions Fences Flush-Tanks Each of these subjects is treated in the appropriate section of this book. An important part of each section of the technical specifications is the clause providing for the method of payment for the work specified. This is usually the last clause in the section. For example, the last clause in the Baltimore Specifications relating to Rock Excavation, is: “Payment will be made for the number of cubic yards of rock measured and allowed as above specified at the price of four dollars and fifty cents ($4.50) per cu. yd., measured in place. Payment for rock excavation will be made in addition to the prices bid for excavation.”