The first digit of the final element identified the department that prepared the drawing, and the last two digits gave the numerical order of preparation, by the same system as that used for preliminary drawings. Thus, an example 12B-204 tells that the drawing has to do with the airstrip on Parry, was prepared by the Civil Department, and was the fourth drawing prepared by that department. This system made for ease and clarity of reference to drawings and facilitated storage, classification, and use. EQUIPMENT AND MATERIAL SPECIFICATIONS Ordinarily, two methods of specification preparation could be followed, By the first method, a basic specification could be written covering the first work increment, and subsequent work increments added by amendment. By the second method, separate specifications could be written covering each successive work increment. By either method, the bulk of the specifications would be great and would be further augmented by addenda occasioned by changes in design or scope of the work, The resulting completed specifications in either case, it was estimated, would be unwieldy in size and confused by a maze of references and cross-references, An even more important objection to the preparation of specifications by either of the foregoing methods was the consideration that if procurement of materials awaited completed construction specifications, the delay in the construction schedules would be excessive because of the distance of haul from source to Jobsite. The procedure finally determined upon was based to a large extent upon the consideration that the services to be rendered by Holmes & Narver under the Contract were not those only of Architect-Engineer, but of Contractor-Manager as well. This type of contract permitted the preparation of the specifications to follow a plan calculated to achieve economies in time and money as well as to obtain clarity and reasonable brevity in the completed specification. This plan called for issuance of specifications at such times and in such increments as would best suit the construction schedules. At the same time, however, the specifications were to be in a form which would allow ready consolidation into one complete specification covering all phases of the work. The plan involved the preparation of two general types of specifications: Equipment and Materials Specifications and Construction Specifications, Equipment and Material Specifications (commonly called Purchase Specifications) were prepared for the purchase of certain materials and equipment. These specifications covered types and qualities of materials, standards of workmanship, methods of fabrication and assembly, and, for equipment, designs, sizes, and capacities, In the first place, use of these specifications made it possible for procurement procedures to be initiated at the earliest possible 5-17