951
SEXTANTS ET AUTRES ARCS A REFLEXION.
952
Adie. On the advantages to be derived/rom theuse ofmetallic reflectorsfor sextants... and on methodsof directly determining the errors in mirrors used inrcflecting instruments.
Edimbourg, Tra, XVI, 1849, 61.
Laurent. Modification apportée aux instrumentsà réflexion permettant de mesurer avec précision leshauteurs d'étoiles à la mer.
Mnd, VIII, i 865 , 612.
§ 23 .
SECTEURS ZÉNITHAUX.
Pond. Some suggestions relative to the best me-thod of employing the new \enith telescope latelyerected at the Royal Observatory.
Londres, PTr, 1834, 209.
Pond. Continuation of a former paper on the25 feet zénith telescope lately erected at the RoyalObservatory.
Londres, PTr, i 835 , 145.
Svanberg, J. Ueber einige neue astronomischeErflndungen Steinheil’s.
ANn, XII, 1 835 , 65 .
Faye. Sur un collimateur zénithal et sur unelunette zénithale, deux instruments nouveaux.
Paris, Crh, XXIII, 1846,872.
Airy. On instruments adapted to the measure ofsmall méridional zénith distance.
Londres, MNt, IX, 1849, 175.
Faye. Note sur les observations zénithales.
Paris, Crh, XXIX, 1849, 289, ^ 49 -
Porro. Sur la lunette zénithale de M. Faye.Paris, Crh, XXXVI, i 853 , 482.
Hall, L. Critical remarks on astronomical observ-ations made with Airy s zénith sector, from 1842-i 85 o, in the détermination of the latitudes of varioustrigonometrical stations.
EnJ„ LIV, i 853 , 35 o.
Dean. Description of the zénith telescope madeby Mr. W. IVilrdemann, and used at the astronomicalstation, Dixmont, Maine.
Washington, CSy, 1 855 , 276.
Bâche. On a supposed personal équation in theuse of the zénith telescope.
AJS,, XXVI, iS 58 , 343. — American Assoc, Pro,iS 58 , 14.
Abbadie, d’. [Remarques sur la lunette zénithalede G. B. Airy.]
ANn, XLIX, i 85 g, 75.
Robert. Nouvel anneau astronomique ou cercleZénithal.
Mnd, V, 1864, 102.
Abbadie, d'. Sur une nouvelle lunette zénithale.
Paris, Crh, LX, i 865 , 1170.
Servier. Sur la rectification de la lunette zéni-thale.
Paris, Crh, LXII, 1866, 991.
Strange. On a transit-instrument and a zenithesector, to be used on the great trigonometrical surveyof India for the détermination, respectively of longi-tude and latitude.
Londres, Pro, XV, 1867, 385 .
Simons. Description of a zénith telescope.
Londres, MNt, XXVIII, 1868, 161.
Davidson. Description of a zénith telescope ofU. S. Coast Survey.
Londres, MNt, XXVIII, 1868, 181; XXIX, 1%
3 1 7 ■
Strange. On the performance of a jenith-sectorconstructed for the great trigonometrical survey ofIndia.
Londres, MNt, XXXI, 1871, 10.
Strange. ...A short note on the performance of aZenith-sector employed on the great trigonometricalsurvey of India.
Londres, Pro, XX, 1872, 317, 372.
Stone, O. On the use of zénith télescopes duringthe coming transit of Venus.
ANn, LXXVIII, 1872,75.
Herschel, J,. Performance of a zénith sector.
ARr, IX, 1872, 82.
*** The indian zénith sector.
ARr, IX, 1872,113.
§ 24 .
HÉLIOSTATS ET SIDÉROSTATS.
Hachette. De Ihéliostat.
Paris, SPh„ I, 180S, 3 9 o ; III, l8l Mf.'x
II, i»i 3 , 101! - Paris, JEP, IX, i 8 i 3 , 263 , X,
— CEP,i8i5,
632 .
Hachette. Description d’un héliostat de nouvelltconstruction inventé par M. Gantbey .
Paris, BSE, XXV, 1826, io 5 , 169. = APC,, XVII1829, 70.
Silbermann. Beschreibung eûtes neuen Hehostaten.
APC,, LVIII, 1843, 574.
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