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Purification of the Washington Water Supply (Classic Reprint)
Попередній перегляд недоступний - 2015
acre additional adopted allowed alum American amount appear average bacteria bacterial efficiency cement cent cleaning clear coagulant Colonel MILLER committee completion concrete connection consideration considered construction contained contract contractor cost covered cubic death determined difference District effect effluent engineer officer English estimate expense experiments fact feet figures filter beds filtered water filtration FULLER furnish gallons give given HAZEN inches increase layer less limit lines material matter means mechanical filter method MOORE necessary number of bacteria obtained officer in charge operation opinion passed period pipe placed plans plant possible Potomac practice present proper purification quantity question reason reduce reference regard removed reservoir River sand filter sand filtration satisfactory Senator shown slow sand filter sufficient surface tion turbidity typhoid fever United washing Washington water supply WESTON WOODWARD
Сторінка 196 - A proposal by a person who affixes to his signature the word '' president," "secretary," "agent," or other designation, without disclosing his principal, is the proposal of the individual. That by a corporation should be signed with the name of the corporation, followed by the signature of the president, secretary or other person authorized to bind it in the matter, who should file evidence of his authority to do so.
Сторінка 109 - California, and of the 12th section of the Act of Congress approved on the 31st of August, 1852, entitled An Act making appropriations for the Civil and Diplomatic expenses of the Government for the year ending the thirtieth of June, eighteen hundred and fifty-three and for other purposes...
Сторінка 197 - Bidders or their authorized agents are expected to examine the maps and drawings in this office, which are open to their inspection, to visit the locality of the work, and to make their own estimates of the facilities and difficulties attending the execution of the proposed contract, including local conditions, uncertainty of weather, and all other contingencies.
Сторінка 227 - The plans and specifications are intended to be explanatory of each other, but should any discrepancy appear, or any misunderstanding arise as to the import of anything contained in either, the explanation of the Engineer shall be final and binding on the Contractor...
Сторінка 231 - ... per cent of water by weight. After being thoroughly mixed and worked for five minutes, the cement or mortar will be placed in the briquette mold in four equal layers...
Сторінка 231 - A cement may be rejected in case it fails to meet any of the above requirements. An agent of the contractor may be present at the making of the tests, or, in case of the failure of any of them, they may be repeated in his presence.
Сторінка 196 - If a bidder wishes to withdraw his proposal he may do so before the time fixed for the opening without prejudice to himself by communicating his purpose in writing to the officer who holds it, and, when reached, it shall be handed to him or his authorized agent unread.
Сторінка 230 - The cement shall be considered to have acquired its initial set when the pat will bear, without appreciable indentation, the Gillmore Mm I needle ^ in.
Сторінка 234 - ... so accepted and the amount for which the proper officer of the united States may contract with another party to furnish said articles and services, if the latter amount be in excess of the former.
Сторінка 231 - ... presence. If the contractor so desires, the engineer officer in charge may, if he deem it to the interest of the United States, have any or all of the tests made or repeated at some recognized standard testing laboratory in the manner herein specified.