part 2, pp. 503-564.

[84] W. H. BURGER, "The Measurement of the Flexure of Pendulum Supports with the Interferometer," _Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1909-10_ (Washington, 1911), app. no. 6.

[85] E. J. BROWN, _A Determination of the Relative Values of Gravity at Potsdam and Washington_ (Special Publication No. 204, U.S. Coast and Geodetic Survey; Washington, 1936).

[86] M. HAID, "Neues Pendelstativ," _Zeitschrift fuer Instrumentenkunde_ (July 1896), vol. 16, p. 193.

[87] DR. R. SCHUMANN, "Ueber eine Methode, das Mitschwingen bei relativen Schweremessungen zu bestimmen," _Zeitschrift fuer Instrumentenkunde_ (January 1897), vol. 17, p. 7. The design for the stand is similar to that of Peirce's of 1879.

[88] DR. R. SCHUMANN, "Ueber die Verwendung zweier Pendel auf gemeinsamer Unterlage zur Bestimmung der Mitschwingung," _Zeitschrift fuer Mathematik und Physik_ (1899), vol. 44, p. 44.

[89] P. FURTWAENGLER, "Ueber die Schwingungen zweier Pendel mit annaehernd gleicher Schwingungsdauer auf gemeinsamer Unterlage," _Sitzungsberichte der Koeniglicher Preussischen Akademie der Wissenschaften zu Berlin_ (Berlin, 1902) pp. 245-253. Peirce investigated the plan of swinging two pendulums on the same stand (_Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1880-81_, Washington, 1883, p. 26; also in CHARLES SANDERS PEIRCE, _Collected Papers_, 6.273). At a conference on gravity held in Washington during May 1882, Peirce again advanced the method of eliminating flexure by hanging two pendulums on one support and oscillating them in antiphase ("Report of a conference on gravity determinations held in Washington, D.C., in May, 1882," _Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1881-82_, Washington, 1883, app. no. 22, pp. 503-516).

[90] F. A. VENING MEINESZ, _Observations de pendule dans les Pays-Bas_ (Delft, 1923).

[91] A. BERROTH, "Schweremessungen mit zwei und vier gleichzeitig auf demselben Stativ schwingenden Pendeln," _Zeitschrift fuer Geophysik_, vol. 1 (1924-25), no. 3, p. 93.

[92] "Pendulum Apparatus for Gravity Determinations," _Engineering_ (1926), vol. 122, pp. 271-272.

[93] MALCOLM W. GAY, "Relative Gravity Measurements Using Precision Pendulum Equipment," _Geophysics_ (1940), vol. 5, pp. 176-191.

[94] L. G. D. THOMPSON, "An Improved Bronze Pendulum Apparatus for Relative Gravity Determinations," [published by] _Dominion Observatory_ (Ottawa, 1959), vol. 21, no. 3, pp. 145-176.

[95] W. A. HEISKANEN and F. A. VENING MEINESZ, _The Earth and its Gravity Field_ (McGraw: New York, 1958).

[96] F. KUEHNEN and P. FURTWAENGLER, _Bestimmung der Absoluten Groesze der Schwerkraft zu Potsdam mit Reversionspendeln_ (Berlin: Veroeffentlichungen des Koeniglichen Preussischen Geodaetischen Instituts, 1906), new ser., no. 27.

[97] Reported by Dr. F. Kuehnen to the fifth session, October 9, 1895, of the Eleventh General Conference, _Die Internationale Erdmessung_, held in Berlin from September 25 to October 12, 1895. A footnote states that Assistant O. H. Tittmann, who represented the United States, subsequently reported Peirce's prior discovery of the influence of the flexure of the pendulum itself upon the period (_Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1883-84_, Washington, 1885, app. 16, pp. 483-485).

[98] _Assistants' Reports, U.S. Coast and Geodetic Survey, 1883-84_ (MS, National Archives, Washington).

[99] C. S. PEIRCE, "Effect of the Flexure of a Pendulum Upon its Period of Oscillation," _Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1883-84_ (Washington, 1885), app. no. 16.

[100] F. R. HELMERT, _Beitraege zur Theorie des Reversionspendels_ (Potsdam: Veroeffentlichungen des Koeniglichen Preussischen Geodaetischen Instituts, 1898).

[101] J. A. DUERKSEN, _Pendulum Gravity Data in the United States_ (Special Publication No. 244, U.S. Coast and Geodetic Survey; Washington, 1949).

[102] Ibid., p. 2. See also, E. J. BROWN, loc. cit. (footnote 85).

[103] PAUL R. HEYL and GUY S. COOK, "The Value of Gravity at Washington," _Journal of Research, National Bureau of Standards_ (1936), vol. 17, p. 805.

[104] SIR HAROLD JEFFREYS, "The Absolute Value of Gravity," _Monthly Notices of the Royal Astronomical Society, Geophysical Supplement_ (London, 1949), vol. 5, p. 398.

[105] J. S. CLARK, "The Acceleration Due to Gravity," _Phil. Trans._ (1939), vol. 238, p. 65.

[106] HUGH L. DRYDEN, "A Reexamination of the Potsdam Absolute Determination of Gravity," _Journal of Research, National Bureau of Standards_ (1942), vol. 29, p. 303; and A. BERROTH, "Das Fundamentalsystem der Schwere im Lichte neuer Reversionspendelmessungen," _Bulletin Geodesique_ (1949), no. 12, pp. 183-204.

[107] T. C. MENDENHALL, op. cit. (footnote 83), p. 522.

[108] A. H. COOK, "Recent Developments in the Absolute Measurement of Gravity," _Bulletin Geodesique_ (June 1, 1957), no. 44, pp. 34-59.

[109] See footnote 89.

[110] C. S. PEIRCE, "On the Deduction of the Ellipticity of the Earth, from Pendulum Experiments," _Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1880-81_ (Washington, 1883), app. no. 15, pp. 442-456.

[111] HEISKANEN and VENING MEINESZ, op. cit. (footnote 95), p. 74.

[112] Ibid., p. 76.

[113] Ibid., p. 309.

[114] Ibid., p. 310.

[115] K. REICHENEDER, "Method of the New Measurements at Potsdam by Means of the Reversible Pendulum," _Bulletin Geodesique_ (March 1, 1959), no. 51, p.72.

* * * * *

Paper 44 - Transcriber's Note

Formatting of equations has been altered from the original: variables are shown without italics; to display them 'in line'; and brackets have been added to clarify expressions where necessary.

Typographical errors and inconsistencies have been corrected as follows:

Page 320: 'difference T_{1} - T_{2} is sufficiently' had 'sufficlently.'

Page 321: 'faites à Genève avec le pendule à réversion' had 'reversion.'

Page 326: 'Schwere mit Hilfe verschiedener Apparate' had 'verschiedene.'

Page 328: 'between the yard and the meter.' closing quote mark deleted.

Page 334: 'Mendenhall apparatus were part of' 'was' changed to 'were.'

Page 342: 'of the Geodetic Institute at Potsdam' had 'Postdam.'

Page 345: 'The gravimetric methods of physical' had 'mtehods.'

Footnote 1 'Société française de Physique' had 'Française.'

Footnote 3 'Cogitata physico-mathematica' had 'physica.'

Footnote 10 'mathématiques et de physique par MM. de l'Académie Royale' had 'mathematiques,' 'Royal.'

Footnote 12 'par ordre du Roy au Pérou, pour observer' had 'Perou, pour observir.'

Footnote 19 'Opticam et Astronomiam' had 'Astronomian.'

Footnote 20 'connaître la longueur du pendule qui' had 'connaitre la longuer.'

Footnote 21 'Abhandlungen der Königlichen Akademie' had 'Königliche.'

Footnote 25 'pour déterminer la longueur du pendule' had 'longeur.'

Footnote 41 'Survey of India (Calcutta, 1879)' had 'Surey.'

Footnotes 45 and 47 'Société de Physique et d'histoire' had 'd'historire.'

Footnote 49 'Über die Grösse und Figur der Erde' had 'Grosse.'

Footnote 53 'Bestimmung der Länge' had 'Lange'; 'Astronomisch-Geodätische Arbeiten' had 'Astronomische'; 'Veröffentlichungen des Königlichen' had 'Königliche.'

Footnote 55 '(1768), vol. 58, pPage 3$1:-335.' had '329-235.'

Footnote 66 'Comptes-rendus de l'Académie' had 'L'Académie.'

Footnote 81 'Sur l'Intensité absolue' had 'l'Intensite.'

Footnote 89 'Sitzungsberichte der Königlicher' had 'Königliche.'

Footnote 100 'Veröffentlichungen des Königlichen' had 'Veröffentlichungen Königliche.'

Capitalisation of 'Von'/'von' has been regulaized to 'von' for all personal names, except at the beginning of a sentence, and when referring to the Von Sterneck pendulum.

* * * * *

_Index_

A

Adams, W. B., 252 Agricola, Georgius, 215, 216 Airy, G. B., 319, 324, 332 Albrecht, Karl Theodore, 322, 338 Aldini, Giovanni, 124 Al-Mamun, seventh calif of Bagdad, 306 Almansi, Emilio, 339 Ames Manufacturing Company, 5, 7 Ampère, André Marie, 127, 129 Anckerswärd, Col. Michael, 157 Angle, Edward H., 295 Arago, Dominique François Jean, 129 Aristarchus of Samos, 54 Aristotle, 179, 306 Astor, John Jacob, 141

B

Baeyer, Adolf, 193 Baeyer, J. J., 321, 322, 324-327, 338, 346 Baily, Francis, 317 Baldwin, Matthias William, 264 Baltimore, Lord. _See_ Calvert. Barlow, Peter W., 221, 227 Bartlett, Charles A., 8 Basevi, James Palladio, 345 Battison, E. A., 18 Beach, Alfred Ely, 224, 227-229, 231, 237 Bechil, Achild, 179 Bemis, Will, 20-22, 27 Bennet, Abraham, 124 Bennett, Frank M., 139, 150, 165 Benz, Carl, 6, 7 Bergh, Christian, 145 Berroth, A., 342 Berthelot, Marcellin, 189 Bertolla, Alessandro, 65 Bertolla, Bartolomeo Antonio, 31, 34, 36-41, 47, 51, 52, 57-59, 62, 63 Berzelius, Jöns Jakob, 133, 182 Bessel, Friedrich Wilhelm, 313, 314, 319, 320, 324, 325, 338, 346 Besson, Jacques, 107 Bettany, G. T., 136 Beyer, Dr. Henry Gustav, 275, 276 Biddle, James, 141 Biot, Jean Baptiste, 135, 325, 329 Black, G. V., 295 Black and Bell, plant at Stratford, 182 Blake, John B., 290, 291 Bohnenberger, Johann Gottlieb Friedrich, 315 Bollman, W., and Company, 91, 92 Bollman, Wendel, 79, 80-83, 85, 88-92, 94-97 Borda, J. C., 311, 312, 315, 325, 329, 346 Borghesi, Father Francesco, 31-59, 70, 71 Boscovitch, Père R. J., 310, 311 Boston Locomotive Works, 260 Bouguer, Pierre, 307, 309-311, 327, 343, 345 Boussingault, Jean Baptiste, 185 Boyd, John C., 276 Boyle, Robert, 178, 179 Brackenridge, S. M., 145 Brahe, Tycho, 54, 306 Brand, H., 178, 179 Brewington, M. V., 155 Brown, Adam and Noah, 141, 142, 145 Brown, Alexander Crosby, 165 Brown, E. J., 334, 339 Brown, Noah, 141, 150, 151 Browne, Charles, 157 Browne, Henry, 304, 314 Browns' yard, 142, 144 Bruhns, C., 322, 324, 338 Brunel, I. K., 217, 218 Brunel, Marc Isambard (the elder), 204, 205, 217, 218, 221, 224, 229, 231, 236 Brunner Brothers (Paris), 329 Buchner, Hans, 197, 200 Burleigh, Charles, 212, 213 Burleigh Rock Drill Company, 212 Burr, S. D. V., 236 Butzjäger, Johann Georg, 36, 37

C

Calvert, George, Lord Baltimore, 156 Calvin, Melvin, 200 Canning, Stratford, 139 Carlisle, Anthony, 124 Carrel, Alexis, 291 Casciarolo, Vicenzo, 179 Cassini, Giovanni-Domenico, 306, 307 Cassini, Jacques, 306 Cassini de Thury, J. D., 311, 312, 315, 325, 329, 346 Cavallo, Tiberio, 124 Cavendish, Henry, 123 Cellérier, Charles, 320, 321, 325, 326, 329, 336 Chapman, Fredrik Henrik af, 156, 166 Charles II of England, 152, 153 Charles VI, Emperor of Austria, 32 Chevreul, Michel, 189 Clairaut, Alexis Claude, 308, 309, 343, 345 Clark, J. S., 342 Clark, John, 91 Clarke, A. R., 345 Cles, Baron of, 57, 59 Coast and Harbor Defense Company, 141 Coast Defense Society, 141, 142 Cochrane, Sir Thomas, 231, 232 Colbert, Jean Baptiste, 306 Colburn, Zerah, 259 Colden, C. D., 149 Coleman, Laurence V., 290 Colgan, P., 10 Colton, Arthur, and Company, 278 Cook, A. H., 342 Cook, Guy S., 339, 342 Copernicus, 54 Copperthwaite, William Charles, 224 Cori, Carl F., 200 Cori, Gerti T., 200 Crookes, William, 192 Cummings, James, 125, 127-129, 133-136

D

Dagger, Benjamin M., 290 Danforth Cooke & Co., 252 Danish Greenland Company, 150 Danish Royal Archives, 139, 150 Davy, Sir Humphry, 185 Dearborn, Henry, 141, 142 Deats, William, 9 Decatur, Stephen, 141 Defforges, C., 314, 329, 346 De Freycinet, Louis Claude de Saulses, 317 De Hevesy, George, 198, 200 De la Hire, Gabriel Philippe, 306 De la Vega, Garcilaso, 185 De Prony, M. G., 314 Deptford Yard (England), 165 De Saussure, Théodore, 185 Di Noris, Cristoforo Sizzo, 59 Dixon, William S., 276 Doane, Thomas, 210, 212, 213, 215 Dodrill, Forest D., 290 Donner, Joseph, 277 Douglas, W. & B., Company, 113 Drake, Edwin L., 213 Drinker, Henry S., 224, 237 Drury, Gardner P., 260 Dryden, Hugh L., 342 Du Buat, L. G., 314 Duperry, Capt. Louis Isidore, 317 Duryea, Charles, 3-13, 15, 16, 19-21, 26, 27 Duryea, J. Frank, 3-7, 9-13, 15-23, 26, 27 Duryea Motor Corporation, 5 Duryea Motor Wagon Company, 3, 27 Duryea Power Company, 5

E

Eastwick, Andrew M., 259 Eckford, Henry, 142 Einthoven, Willem, 290 Emerson, John Haven, 285 Emmet, ----, 144 Eratosthenes, 306, 308, 342 Erman, Paul, 128, 129, 132, 133 Eudoxus of Cnidus, 306 Euler-Chelpin, Hans von, 197, 200 Evans, Samuel, 141, 145 Evelyn, John, 32

F

Faraday, Michael, 125 Faye, Hervé, 325-327, 336-338, 346, 347 Ferchl, Fritz, 285 Fernel, Jean, 306 Fernelius, Jean, 179 Feulgen, Robert, 193 Fink, Albert, 79, 91 Fischelis, Robert P., 287 Fischer, Emil, 193 Fleming, Sir Alexander, 290, 295 Flint, James Milton, 273-278 Fox, Josiah, 157 Francis I, Emperor of the Holy Roman Empire, 42, 44, 52, 58 Fulton, Robert, 139, 141, 142, 144, 147, 149, 150, 157, 159, 165 Furtwängler, P., 337-339

G

Gahn, Johann Gottlieb, 182 Galilei, Galileo, 304, 305, 346 Galvani, Luigi, 124 Garfield, James A., 272 Garrison, Fielding H., 277 Gauss, C. F., 320 Gautier, P., 339 Gay-Lussac, Joseph Louis, 125, 182 Gilbert, L. W., 127-129, 132 Gobley, Nicolas Théodore, 191 Godin, Louis, 307 Goldingham, John, 316, 345 Goode, G. Brown, 273 Graham, Thomas, 182, 183, 185 Gravatt, C. U., 276 Greathead, James Henry, 204, 218, 221, 224, 229, 231, 235-237 Greely, A. W., 329 Griffenhagen, George B., 290, 291 Grubenmann, Hans, 85 Grubenmann, Johann Ulrich, 85 Gulf Oil and Development Company, 338 Gurley, Ralph R. (USN), 150, 151 Gustav III of Sweden, 156, 157 Gwynn, Stuart, 210

H

Hahn, Father Philipp Matthäus, 33 Haid, M., 335 Hall, Basil, 316 Hammond, William Alexander, 273 Hankwitz, Gottfried, 180 Harden, Arthur, 197, 200 Harrington, Frank, 7 Harrison, Joseph, Jr., 259 Hartford Machine Screw Company, 6 Hartmann, Immanuel Peter, 181 Haskin, DeWitt C., 204, 232, 234-236 Haupt, Herman, 96, 204, 209, 210 Hawley, C. E., 6, 11 Hawthorn, Leslie, and Company (Scotland), 166 Heaviside, W. J., 321, 345 Heiskanen, W. A., 338, 345, 346 Hellot, Jean, 180 Helmert, F. R., 338, 339 Helmholtz, Hermann von, 326 Henderson, Alfred R., 291 Henkel, Silon, 290 Henry II, King of France, 179 Herschel, John, 319, 328, 345 Heyl, Paul R., 339, 342 Hindle, Charles F., 290 Hinkley, Holmes, 252, 260, 263 Hirsch, Adolph, 322, 324-326 Hittorf, Wilhelm, 181 Hobson, Joseph, 237 Hoefer, Ferdinand, 179 Holmberg, Wilhelm, 178 Holt, L. Emmett, 276 Hoppe-Seyler, Felix, 193 Howard, George W., & Company, 8 Hull, A. S., 251, 268 Humboldt, Alexander von, 185 Huygens, Christiaan, 179, 304, 305, 307, 314, 342, 346

I

Ibañez, Carlos, 325 Incas, 185

J

Jefferson, Thomas, 145 Jeffreys, Sir Harold, 342 Jones, Jacob, 141 Jones, Thomas, 318 Jones, William, 147

K

Kater, Henry, 304, 314-320, 325, 327, 329, 345, 346 Kells, Charles E., 295 Klein, Father ----, 33 Kletwich, Johann Christopher, 179 Knight, ----, 83 Koett, Albert B., 287 Koppe, Émile, 181 Kornberg, Arthur, 200 Kossel, Albrecht, 200 Kraft, Johann Daniel, 179 Kramer, Dr. ----, 181 Kühnen, F., 338, 339 Kunckel, Johann, 179

L

La Condamine, Charles Marie de, 307, 310, 311, 343 Lange, W., 199 Laplace, Marquis Pierre Simon de, 309, 313, 320 Latrobe, Benjamin H., 82, 83, 85, 87-91, 208, 209 Laurie, J., 157 Lavoisier, Antoine Laurent, 181, 185 Law, Henry, 218 LaWall, Charles H., 285 Laws, John Bennet, 186 Lederle Laboratories, 290 Leibnitz, Gottfried Wilhelm von, 179 Lennox, Charles, third Duke of Richmond, 185 Leonhardi, Johann Gottfried, 179 Levine, Phoebus Aaron Theodor, 193 Lewis, Jacob, 141 Lewis, Morgan, 141 Lewton, Frederick L., 277 Liebig, Justus, 183, 185, 186 Liebreich, Oscar, 191 Lilly, Eli, and Company, 283 Lindbergh, Charles A., 291 Lipmann, Fritz, 200 Lippi, Fra Lippo, 42 London, E. S., 193 Long, Crawford W., 294 Long, Stephen H., 85 Longomontanus, Christian Severin, 54 Lorenzoni, Giuseppe, 336, 339 Lütke, Count Feodor Petrovich, 316, 345

M

Macquer, Peter Joseph, 180 Marestier, Jean Baptiste, 147, 149, 159, 162 Marggraf, Andreas Sigismund, 180 Maria Theresa, Empress of Austria, 31, 41, 42, 44, 57, 58 Mariners' Museum, 165 Markham, Erwin F., 8, 9, 15, 16, 19-22, 27 Marmion, R. A., 276 Marsh, James, 145 Marshall, Charles, 11, 16 Maudslay, Henry, 106, 113 Maupertius, P. L. Moreau de, 308, 343 Maxwell, James Clerk, 324 May, Arthur J., 139 Mayer, Jo, 285 McMurtrie, Daniel, 276 Medi, Enrico, 342 Meigs, M. C., 96 Meineke, ----, 128 Mendenhall, Thomas Corwin, 319, 331, 332, 334, 347 Merrick, C. E., 10 Mersenne, P. Marin, 305 Meton, 48 Meyerhof, Otto, 194, 200 Miescher, Johann Friedrich, 192 Miller, Patrick, 156, 157 Mitchill, Samuel L., 141, 142 Monauni, Giovanni Battista, 40, 52 Monroe, James, 145 Montgéry, M., 147, 149-152, 159 Morgan, "Mr.", 144 Morris, Tasker and Company, 94 Morris, Thomas, 141, 142 Morton, Arthur O., 290 Morton, William, 294 Mount Clair shops, 83, 89, 92 Mowbray, George W., 213, 215 Muspratt, James, 186

N

Nagel, Oscar P., 295 Nason, Joseph, 114 National Maritime Museum (England), 147, 156, 165 Nelson, Robert J., 295 Nesbitt, Mr. and Mrs. D. H., 13 Newton, Sir Isaac, 303-305, 307, 308, 342, 343 Nicholson, William, 124 Nietzsche, Friedrich, 186, 187, 189 Nobel, Alfred B., 213 North, Simeon, arms factory, 114 Norwood, Richard, 306

O

Ochoa, Severo, 200 Oersted, Hans Christian, 125-130, 132-136 Ohm, Georg Simon, 123, 135 Oken, Lorenz, 132 Olson, Carl G., 118 Oppolzer, Theodor von, 322, 324-327 Owen, H. S., 5

P

Page, Irving, 4 Parke, Davis & Company, 273 Parmelee, L. J., 10 Patapsco Bridge and Iron Works, 92, 95 Patrick, Mr. and Mrs. ----, 13 Patterson, Carlile Pollock, 325, 326 Peirce, Charles Sanders, 314, 322-329, 332, 336-339, 342, 345-347 Pelouze, Théophile Juste, 189 Pepys, Samuel, 155 Perry, Oliver, 141 Peters, C. A. F., 322, 324 Petty, Sir William, 152, 153, 155, 166 Pfaff, Christian Heinrich, 132 Philolaus, 54 Phoenix Iron Works, 92 Physick, Philip Syng, 294 Picard, Abbé Jean, 306, 308-311, 342 Plantamour, E., 319-321, 324-326 Poggendorf, Johann Christian, 127-129, 132-134, 136 Poissant, A. A., 10 Pope Manufacturing Company, 6, 12 Porter, David, 144 Posidonius, 306 Pratt, Thomas W., 91 Preston, E. D., 328, 329 Ptolemy, 54 Purcell, William, 147 Putnam, G. R., 339 Putnam Machine Works, 212 Pythagoras, 54, 306

Q

Quare, Daniel, 32

R

Raschig, Christoph Eusebius, 129 Rasmussen, Kjeld, 150 Reed, D. A., 27 Reeves, Samuel J., 92, 95 Repsold, A., and Sons (Hamburg), 320, 322, 338, 339, 346 Richer, Jean, 307, 342 Richmond, Duke of. _See_ Lennox. Riciolus, 54 Rigsarkivet (Denmark), 147 Ritter, Johann Wilhelm, 129 Roebling, John A., 83, 90 Roentgen, Wilhelm Konrad, 290, 294 Rouelle, Guillaume François, 181 Royal Society of London, 152 Russell, John W., & Sons Company, 9, 10, 18, 20 Russell, William J., 9, 10, 15, 18 Rutgers, Henry, 141, 142

S

Sabine, Capt. Edward, 315, 325, 329, 345 San Cajetano, Brother David à, 33 San Daniele, Father Aurelianus à, 33 Savage Factory, 88 Savart, Felix, 135 Sawitsch, A., 321, 322 Scheele, Karl W., 182 Schieffelin and Company, 273 Schmiedeberg, Oswald, 193 Schrader, Gerhard, 199 Schrötter, Anton, 181 Schumacher, H. C., 320 Schumann, R., 335, 336 Schweigger, Johann Salomo Christoph, 127-130, 132-134, 136 Seebeck, T., 128, 135 Shanley, Walter, 212 Shanley Bros., 215 Shea, T., 10 Smith, ---- (Captain, USN), 144 Smith, Alba F., 244, 246, 247, 259 Smith, Sir Sidney (RN), 155 Smith Carriage Company, 8 Snell, Willebrord, 306 Snow, ----, 8 Soemmering, S. T., 125 Sommeiller, Germain, 210 Sonnedecker, Glenn, 296 Speter, M., 127, 128 Squibb, E. R., and Sons, 285, 286 Statens Sjöhistoriska Museum (Sweden), 147 Stephenson, Robert, 90 Stephenson, Robert, & Hawthorns, Ltd., 253 Sterneck, Robert von, 331, 332, 335, 338, 346 Stevens, J., Arms and Tool Company, 4 Stevens-Duryea Company, 4 Stewart, Charles, 145 Stiles, George, 144 Stokes, George Gabriel, 324, 328, 329, 345, 346 Stoklasa, Julius, 186 Storrow, Charles S., 210 Stoudinger, Charles, 144 Strecker, Adolf Friedrich, 191 Stuart, Charles B., 139, 150 Stuart, J. E. B., 249 Sully, Henry, 32 Swaine, Jack, 26 Symington, William, 157

T

Tanner, Paul H., 295 Taunton Locomotive Works, 247 Taylor, Frank A., 292 Tegmeyer, John H., 91 Thames Iron-works Company (England), 165 Thenard, Louis Jacques, 125 Thomas, George S., 287 Thudichum, Ludwig, 192 Todd, Lord Alexander, 200 Tompion, Thomas, 32 Toner, Joseph Meredith, 271 Tovazzi, Giangrisostomo, 57, 58 Town, Ithiel, 85 Tromsdorff, Johann Bartholomacus, 125 Tweed, William Marcy (Boss), 229 Tyler, Daniel, 244, 253 Tyler, David B., 139

U

Ulloa, Antonio de, 308 Union Works, 260 Uppercu, Inglis M., 27

V

Vander Woerd, Charles, 116, 117 Van Marum, Martin, 123 Vening Meinesz, F. A., 337, 338, 345-347 Volet, Charles, 342 Volta, Alessandro, 123, 124, 127 Vulcan Foundry, 252

W

Wallace Brothers, 273 Ward, Frederick A., 120 Warrington, Samuel, 141 Warwick, George, 18 Watts, Frederick, 249 Weale, John, 218 Wernwag, Lewis, 89 Westhaeffer, Paul, 251 Wetmore, Dr. Alexander, 287 Wetschgi, Emanuel, 108 Wetschgi, Manuel, 108, 111 Whipple, Squire, 79, 83, 87, 91, 95 Whistler, George W., 83 White, C. H., 276 Whitebread, Charles, 277, 278, 281, 283, 285, 287 Whitney arms factory, 114 Wilkes, Charles, 317, 318 Wilkinson, David, 113 Williamson, Dowe, 32 Williamson, Joseph, 32 Willm, Edmond, 182 Willstätter, Richard, 191 Wilmarth, Seth, 244, 246, 247, 249, 260 Wilson, Frank E., 290 Wilstack, Paul, 155 Winans, Ross, 83 Winters, Joseph, 244 Winters, Father S. X., S. J., 42 Winz, Johann Christian, 36, 37 Wisshofer, Peter, 36, 37 Wolcott, Oliver, 141, 142 Wollaston, W. H., 125 Wright, Benjamin, 83 Wurtz, Adolphe, 185, 191

Y

Youle, John, foundry, 142

Z

Zamboni, Giuseppe, 132

* * * * *

Transcriber's Notes (Index)

"Emmet, ----, 144" (was Emmett).

* * * * *