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aperture appear Astronomical Society binary stars Board of Directors bright brightest Burckhalter Burnham California Street color comet Committee Corona cosh curve dark determined diameter disc distance Double Stars drawings E. E. Barnard Eclipse elected equation errors exposure faint give Harvard College Observatory Holden inches instruments J. E. Keeler J. M. Schaeberle January July Jupiter latitude Library Lick Observatory light limb magnitude Mars mass means measures meeting micrometer minutes Molera moon motion Mount Hamilton nebula nebular line negatives Oakland object observations obtained orbit P1erson Pacific paper photographic planet plate Polaris position present printed Prof Professor Publications Red Spot refractor rotation Royal Observatory S. W. Burnham San Francisco satellite Saturn Secretaries seen Sept solar spectroscope spectrum square Struve surface telescope thirty-six-inch tion transit University Observatory visible visual magnitudes White Spot yellow yellowish
Page 201 - URIAH A. BOYDEN, ESQ., of Boston, Mass., has deposited with THE FRANKLIN INSTITUTE the sum of one thousand dollars, to be awarded as a premium to "Any resident of North America who shall determine by experiment whether all rays of light,* and other physical rays, are or are not transmitted with the same velocity.
Page 74 - He stated that his investigations seemed to prove conclusively that the solar corona is caused by light emitted and reflected from streams of matter ejected from the sun, by forces which, in general, act along lines normal to the surface of the sun ; these forces are most active near the centre of each sun-spot zone.
Page 136 - BACHE FUND OF THE NATIONAL ACADEMY OF SCIENCES DR. HEBER D. CURTIS has been elected a member of the board of directors of the Bache Fund of the National Academy of Sciences in place of Dr. EB Frost, resigned. The board is at present constituted as follows: Professor AG Webster, Clark University, Worcester, Massachusetts; Dr.
Page 317 - ... superior to and more powerful than any telescope ever yet made, with all the machinery appertaining thereto, and appropriately connected therewith...
Page 314 - The association of observers, especially the possessors of small telescopes, for mutual help, and their organization in the work of astronomical observation. (2) The circulation of current astronomical information. (3) The encouragement of a popular interest in astronomy.
Page 205 - Forty-six presents were announced as having been received since the last Meeting, and the thanks of the Society were returned to the donors.
Page 131 - The only remedy is a most serene and quiet Air, such as may perhaps be found on the tops of the highest Mountains above the grosser Clouds.
Page 309 - On a fine night the amount of work which can be accomplished, with an entire exemption from the trouble, vexation and fatigue which seldom fail •to attend upon ordinary observations, is astonishing. The plates once secured, can be laid by for future study by daylight and at leisure. The record is there, with no room for doubt or mistakes as to its fidelity.
Page 310 - It is reasonable to suppose that on some lofty mountain and in a purer atmosphere we might, with the same telescope, include the eighth magnitude. To increase the size of the telescope threefold in aperture is a practicable thing if the money can be found. This would increase the brightness of the stellar images, say eightfold, and we should be able then to photograph all the stars to the tenth and eleventh magnitude, inclusive. There is nothing then so extravagant in predicting a future application...