0170 Measurement of Force 



Seismograph, micro-. Del Lungo, C. Bv. Sc. 



[Ind.] 30 (1898) 73-. 

 , , to record 2 components. Landi, U. 



Ev. Sc. [Ind.] 30 (1898) 92-. 

 , new. Baratta, M. Ev. Sc.-Ind. 23 (1891) 



205-. 

 , . Cancani, A. Em. E. Ac. Line. Ed. 



8 (1899) (Sem. 1) 46-. 

 , . Agamennone, G. Em. E. Ac. Line. 



Ed. 9 (1900) (Sem. 2) 31-. 

 , pendulum, inventor. Terrenzi, G. Ev. 



Sc.-Ind. 19 (1887) 52-. 

 , photographic. Tacchini, P. Em. E. Ac. 



Line. Ed. 6 (1890) (Sem. 1) 432-. 



with vertical pendulum. Viola, C. Em. 

 E. Ac. Line. Ed. 9 (1900) (Sem. 1) 317-. 



Seismographs: Perry tromometer. Perry, J. 



B. A. Ep. (1896) 218-. 



Seismometric instruments used in Italy. 



Davison, C. B. A. Ep. (1896) 220-. 

 Seismoscope, electric. Grablowitz, G. Ev. 



Sc.-Ind. 25 (1893) 198-. 

 , . Agamennone, G. Em. E. Ac. Line. 



Ed. 9 (1900) (Sem. 1) 204-. 

 , new. Agamennone, G. Em. E. Ac. Line. 



Ed. 8 (1899) (Sem. 1) 41-. 

 Seismoscopes, 2 new, description. Anon. Ev. 



Sc.-Ind. 21 (1889) 221-. 

 Spring balance. Oeri, . Sch. Gs. Vh. 



(1841) 212-. 

 for accurate weighing. Jolly, P. Munch. 



Sb. (1864) (1) 162-. 

 , improved, for Prony brakes. Wettler, 



A. Elekttech. Z. 19 (1898) 658-. 



, new. Steinheil, C. A. von. Munch. 

 Gelehrte Az. 8 (1839) 817-. 



, form. Linebarger, C. E. Ps. Ev. 

 11 (1900) 110-. 



Springs, use in apparatus of delicate measure- 

 ment. Witz, . Brux. S. Sc. A. 21 (1.897) 

 (Pt. 1) 19-. 



Steam-engine, measurement of useful force in, 

 without brake. Mahistre, . C. E. 46 

 (1858) 39-. 



Suspension, bifilar, measurement by. Stahelin, 



C. Sch. Gs. N. D. 13 (1853) vi + 204 pp. 



, , mechanical temperature compensation. 



Liznar, J. Z. Instk. 8 (1888) 13-, 76. 

 , trifilar, use in physical apparatus. Thomp- 

 son, S. P. B. A. Ep. (1897) 588. 

 , unifilar, value of torsional couple. Limb, 



C. C. E. 114 (1892) 1057-. 

 Thermodynamometer, description and theory. 



Berruti, G. Tor. At. Ac. Sc. 7 (1871-72) 485-. 

 Torsion balance, American. Dittmar, W. Z. 



Instk. 10 (1890) 433-. 

 , Coulomb's. Muncke, G. W. Pogg. A. 



17 (1829) 159- ; 18 (1830) 239-; 29 (1833) 



381. 



, , modification. Gieseler, . Bonn 

 Niedr. Gs. Sb. (1891) 83. 



, counteracting change of level in. Kent, 



W. Am. As. P. (1886) 116. 

 , effect of bodies at various temperatures 



near arm. Lenz, E. Pogg. A. 25 (1832) 



241-. 

 , mirror for use with. Kent, W. Am. As. 



P. (1886) 116-. 



The Constant of Gravitation 0180 



Torsion balance, new. Springer, A. Am. I. 



Mn. E. T. 12 (1884) 569-. 

 , experiments. Reich, F. Leip. Ab. 



Mth. Ps. 1 (1852) 383-. 

 , oscillations, theory. Brandes, H. W. 



Voigt Mg. 12 (1806) 300-. 



, resistance of air. Bailie, J. B., & 

 Cornu, A. C. E. 86 (1878) 571-. 



, terms proportional to square of displace- 

 ment in. Bailie, J. B.,& Cornu, A. C. E. 

 86 (1878) 1001-. 



, unifilar. Tammen, H. G. Carl Epm. 



18 (1882) 348-. 



balances. Springer, A. B. A. Ep. (1887) 

 636. 



, and elasticity of glass threads. Ritchie, 



W. Phil. Trans. (1830) 215-. 

 , . Goode, W. H. Franklin 



I. J. 24 (1839) 367-. 



of fine threads. Bouasse, H. A. C. 11 

 (1897) 433-. 



method of determining small weights. 

 Loewenherz, L. (xn) Z. Instk. 1 (1881) 

 184-. 



Torsional moments, method of determining. 



Negbaur, W. A. Ps. C. 41 (1890) 631-. 

 Trains, energy stored in, at different velocities. 



Dudley, P. H. Am. Eng. & Eailroad J. 73 



(1899) 366. 

 , tractive force, resistance, and acceleration. 



Mallock, A. B. A. Ep. (1900) 877-. 

 Watt and the measurement of power. Preece, 



W. H. Elect. 38 (1897) 511-. 

 Work done by men. Field, Jos. CE. I. T. 2 



(1838) 211-. 

 under various conditions. Coulomb, 



C. A. Par. Mm. de I'l. 2 (1799) 380-. 



of man using crank. Hecht, D. F. N. 

 Bergm. J. 4 (1804) 185-. 



0180 The constant of gravitation. 



(See also 1220 ; Astronomy 1050, 

 5100; Geography 02.) 



Anomalies of gravity. Schiaparelli, G. Mil. 



S. It. At. 36 (1896) 61-. 

 , Bouguer's formula. Sloudsky, T. 



Mosc. S. Nt. Bll. 8 (1895) 271-. 

 Attraction, universal, experiment verifying. 



Laborde, . Les Mondes 55 (1881) 356-. 

 Balance, application." Jolly, P. von. [1878-811 



Munch. Ak. Ab. 13 (1880) (Ab. 1) 155- ; 14 



(1883) (Ab. 2) 1-. 

 Earth, attraction. Holler, M. Met. Z. 11 



(1894) 396-. 



, on bodies far from the surface. Bidone, 

 G. Gergonne A. Mth. 10 (1819-20) 357-. 



, for different substances. Bessel, F. W. 

 Berl. Ab. (1830) 41-. 



, methods of weighing. Konig, . Magdeb. 

 Nt. Vr. Jbr. u. Ab. (1890) 41-. 



, . Boys, C. V. Leic. S. T. 3 



(1895) 407-. 



_, . Konig, W. Frkf. a. M. Ps. Vr. 



Jbr. (1895-96) 38-. 



59 



