The American Journal of ScienceJ.D. & E.S. Dana, 1895 |
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Стр. 81
... force of gravity in the United States were made in the vicinity of the Atlantic Ocean , not more than one or two stations in the Mississippi Valley having been occupied previous to the year 1890. A determination had , however , been ...
... force of gravity in the United States were made in the vicinity of the Atlantic Ocean , not more than one or two stations in the Mississippi Valley having been occupied previous to the year 1890. A determination had , however , been ...
Стр. 82
... force of gravity along this great continental are to the various elevations above the sea of the stations at which the work was done . Below is a list of the stations occupied , arranged in the order of their longitude , beginning with ...
... force of gravity along this great continental are to the various elevations above the sea of the stations at which the work was done . Below is a list of the stations occupied , arranged in the order of their longitude , beginning with ...
Стр. 83
... force of grav- ity at each station . These values of the force of gravity must be accepted only tentatively , as it will appear that they are all made to depend upon the value at Washington . This value . was adopted after an ...
... force of grav- ity at each station . These values of the force of gravity must be accepted only tentatively , as it will appear that they are all made to depend upon the value at Washington . This value . was adopted after an ...
Стр. 84
... force of gravity when reduced to the sea level over that as computed for the theoretical spheroid , by the use of Helmert's formula , is obtained , and the difference between these two quantities will be found in one of the columns of ...
... force of gravity when reduced to the sea level over that as computed for the theoretical spheroid , by the use of Helmert's formula , is obtained , and the difference between these two quantities will be found in one of the columns of ...
Стр. 85
... force of gravity can be expected to result from any possible error in the representation of the geoid by this figure . These results are certainly of much interest and importance . to geologists , and it seems that they may , when the ...
... force of gravity can be expected to result from any possible error in the representation of the geoid by this figure . These results are certainly of much interest and importance . to geologists , and it seems that they may , when the ...
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Стр. 236 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
Стр. 508 - Index Kewensis: an enumeration of the genera and species of flowering plants from the time of Linnaeus to the year 1885 inclusive, together with their authors' names, the works in which they were first published, their native countries, and their synonyms.
Стр. 292 - It will be remembered that, from the velocity of sound in a gas, the ratio of specific heat at constant pressure to that at constant volume can be deduced by means of the equation when n is the frequency, A.
Стр. 237 - As a unit of quantity, the international coulomb, which is the quantity of electricity transferred by a current of one international ampere in one second. As a unit of capacity, the international farad, which is the capacity of a condenser charged to a potential of one international volt by one international coulomb of electricity.
Стр. 237 - ... As a unit of electromotive force, the international volt, which is the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere, and which is represented sufficiently well for practical use by \\\% of the electromotive force between the poles or electrodes of the voltaic cell known as Clark's cell, at a temperature of 15° C., and prepared in the manner described in the accompanying specification...
Стр. 318 - The crystals should be dissolved with the aid of gentle heat, but the temperature to which the solution is raised must not exceed 30° C.
Стр. 237 - The unit of induction shall be the Henry, which is the induction in a circuit when the electro-motive force induced in this circuit is one international volt while the inducing current varies at the rate of one Ampere per second.
Стр. 277 - We are in the case of Tarpeia, who opened the gates of the Roman citadel to the Sabines, and was crushed under the weight of the reward bestowed upon her.
Стр. 317 - The result will be the time-average of the current, if during the interval the current has varied. In determining by this method the constant of an instrument the current should be kept as nearly constant as possible, and the readings of the instrument observed at frequent intervals of time. These observations give a curve from which the reading corresponding to the mean current (time-average of the current) can be found. The current, as calculated by the voltameter, corresponds to this reading.
Стр. 316 - ... through a solution of nitrate of silver in water. The silver voltameter measures the total electrical quantity which has passed during the time of the experiment, and by noting this time the time average of the current, or, if the current has been kept constant, the current itself, can be deduced. In employing the silver voltameter to measure currents of about one ampere...