Annual of the National Academy of SciencesThe Academy, 1866 - Science |
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Page 99
... opening . He directed that the throat should be no larger than necessary to receive the muzzle of the gun and to ... openings of the lower embrasures are 4 ' 8 " by 6 feet , giving an area of 28 square feet ; and of the second tier , 3 ...
... opening . He directed that the throat should be no larger than necessary to receive the muzzle of the gun and to ... openings of the lower embrasures are 4 ' 8 " by 6 feet , giving an area of 28 square feet ; and of the second tier , 3 ...
Page 100
... opening might be a little less than three feet . " The plan of this embrasure shows that the interior opening is 5 ' 6 " wide , and that the plane of the throat is within 2 feet of the outside of the wall , which just at the embrasure ...
... opening might be a little less than three feet . " The plan of this embrasure shows that the interior opening is 5 ' 6 " wide , and that the plane of the throat is within 2 feet of the outside of the wall , which just at the embrasure ...
Page 101
... openings from eighteen , twenty - two , and twenty - eight , down to about ten square feet , while he in- creased the sector of fire of the gun from forty - five to sixty degrees ; thus adding one third to its field of fire , and conse ...
... openings from eighteen , twenty - two , and twenty - eight , down to about ten square feet , while he in- creased the sector of fire of the gun from forty - five to sixty degrees ; thus adding one third to its field of fire , and conse ...
Page 103
... opening reduced to an absolute minimum . Nothing but experiment could lead to sound conclusions , and the experiments re- ferred to on a former page were instituted , the princi- pal objects of which were ( in General Totten's own lan ...
... opening reduced to an absolute minimum . Nothing but experiment could lead to sound conclusions , and the experiments re- ferred to on a former page were instituted , the princi- pal objects of which were ( in General Totten's own lan ...
Page 106
... opening of one of the · 6 balls . 58 balls . 351 balls . " embrasures of our second target , of which the area is 8.9 square feet , there would fall " Within the European embrasure above men- tioned , having fifty - four square feet of ...
... opening of one of the · 6 balls . 58 balls . 351 balls . " embrasures of our second target , of which the area is 8.9 square feet , there would fall " Within the European embrasure above men- tioned , having fifty - four square feet of ...
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Common terms and phrases
A. D. Bache Academy of Sciences Annual appointed army ARNOLD GUYOT attack B. A. Gould Benjamin Peirce Board of Engineers Cadets casemate casemated battery Chairman Chief Engineer Class Colonel Totten Committee Congress Constitution construction Corps of Engineers Council designed duties election embrasure enemy enemy's engineer officer eral Totten experiments exterior opening F. A. P. Barnard FAIRMAN ROGERS feet fire fleet force Fort Adams fortifications forts Girard College guns Home Secretary honored J. D. Whitney J. E. Hilgard J. H. ALEXANDER J. L. Le Conte J. S. Newberry JOHN TORREY JOSEPH GILBERT TOTTEN JOSEPH SAXTON labors Louis Agassiz masonry meeting memoirs ment Military Academy Montalembert National Academy naval navy Newport object period ports present President Rutherfurd scientific sea-coast seaboard seaports SECT Section shells ships SILLIMAN species Stephen Alexander Theodore Strong thickness tion Treasury United vessels vote Washington West Point WILLIAM CHAUVENET WOLCOTT GIBBS York
Popular passages
Page 6 - States as may be designated, and the Academy shall, whenever called upon by any department of the Government, investigate, examine, experiment, and report upon any subject of science or art, the actual expense of such investigations, examinations, experiments, and reports to be paid from appropriations which may be made for the purpose, but the Academy shall receive no compensation whatever for any services to the Government of the United States.
Page 56 - Heaped with long toil the earth, while yet the Greek Was hewing the Pentelicus to forms Of symmetry, and rearing on its rock The glittering Parthenon.
Page 6 - That the National Academy of Sciences shall consist of not more than fifty ordinary members, and the said corporation hereby constituted shall have power to make its own organization, including its constitution, bylaws, and rules and regulations...
Page 72 - ... the foe, unless we can control the chances of finding the enemy's fleet within his- port, and the still more uncertain chance of keeping him there ; the escape of a single vessel being sufficient to cause the loss of our harbor.
Page 123 - ... as the phrase is, though retaining all its thickness, the ice will at last scarcely support a small weight, though bearing upon a large surface : the foot of man easily breaking through, and very slight resistance being made to the point of a cone." The points of contact of the particles being destroyed, each will...
Page 76 - ... 3d. How far vessels of war," steam batteries, ordinary merchant ships and steamers, and other temporary expedients, can be relied upon as a substitute for permanent fortifications for the defence of our seaports? " 4th. How far the increase of population on the northern frontier and of the mercantile marine on the northern lakes obviates or diminishes the necessity of continuing the system of fortifications on these...
Page 79 - Or twelve or fifteen such steamers could have carried the whole army up in half a day, without the delay of transports. Will it be contended that the attack in that form would have been repulsed with the means then in General Jackson's hands ? Would the landing, or even the presence on board these steamships, of the British troops have been necessary to burn the city or put it under contribution? Is there anything now, but the existence of forts on the river, to prevent the success of such an attack...
Page 97 - He did not fail, however, to take the opportunity to examine, as far as he was able, the fortifications of Europe, of the character and peculiarities of which, however, he had little to learn. On his return he was sent by Floyd to the Pacific coast, with directions to inspect the fortifications in construction, and to report on the defensive requirements of that region. This duty and the report thereon he executed in his usual thorough and exhaustive manner. It furnished him with the opportunity...
Page 113 - ... President, consisted of Commander "WB Shubrick, General JG Totten, Colonel James Kearney, Captain SF Dupont, United States navy, Professor A. Dallas Bache, superintendent United States coast survey, and Thornton A. Jenkins, United States navy, as secretary. Its labors were directed first to demonstrating the evils, irregularities, and abuses which had crept into the light-house service under the management of the Fifth Auditor of the treasury, (the late venerable and highly respected Stephen...
Page 65 - The means of defense for the seaboard of the United States, constituting a system, may be classed as follows: First, a navy; second, fortifications; third, interior communications by land and water; and fourth, a regular army and wellorganized militia.