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Common terms and phrases16 equations 24 part commutator 288 convolutions 312 convolutions acid alum alumina anemometer atomic weight centrum chloride constants crucible cups Current in webers denote determined Developed in outer diameter double theta-functions drying tubes Dumas Echidna Electro electro-dynamometer Electro-magnets error experiments formulae friction grms Helix hence horns Horse-power hydrate hydrochloric acid hydrogen inches indefinitely small integers linear function m.m. wire machine magnet MDCCCLXXX mean Megalania Megalania prisca Moloch horridus neural nitric acid notation obtained occipital odd functions outer circuit outer in circuit ovum oxygen pairs product-theorem quadric quantity quartic surface quotient-functions Resistance in S. U. S. U. resistance set of 16 silver skull sodium solution spine squared functions Stas Suffixes surface temperature tetrad theta-functions Total developed tube values vertebra weight of aluminum writing Popular passagesPage 1030 - ... arguments drawn from every field of natural inquiry. This idea of course was at the basis of the hypothesis of Prout, but which, even as modified by Dumas, was held to be refuted by the monumental work of Stas. But, as pointed out by Marignac and Dumas, anyone who will impartially look at the facts can hardly escape the feeling that there must be some reason for the frequent recurrence of atomic weights differing by so little from the numbers required by the law which the work of Stas was supposed... Page 1003 - He says that from experiments which he w made on the quantity of ammonia required to decompose saturated solutions of alumina in acids, it would appear that the number representing alumina is about 48, and supposing it to consist of one proportion of aluminum, and one of oxygen, 33 will be the number representing aluminum. Page 1066 - A very remarkable increase of all the effects, accompanied by a diminution in the resistance of the machine, is observed when a cross wire is placed so as to divert a great portion of the current from the electromagnet. Page 1068 - This construction of machine enables the author to effect an important simplification of the regulator to work eleytric lamps, enabling him to dispense with all wheel and clockwork in the arrangement. The two carbons being pushed onward by gravity or spring power are checked laterally by a pointed metallic abutment situated at such a distance from the arc itself, that the heat is only just sufficient to cause the gradual wasting away of the carbon in contact with atmospheric air. The carbon holders... Page 1068 - The weight of the core, which has i to be maintained in suspension by the attractive force produced by the current, determines the distance between the electrodes, and hence the electric resistance of the arc. The result is that the length of the arc is regulated automatically so as to maintain a uniform resistance, signifying a uniform development of light. APPENDIX. The measurements of the electric... Page 1065 - It consisted of two horseshoe electro magnets, between the poles of which a Siemens armature could be made to rotate, the machine being furnished with a handle or pulley for that purpose. A commutator was provided, by which the alternating currents set up in the rotating coil (after a first impulse had been given) were directed through the coils of the stationary electro magnets in a continuous manner, and proceeded thence outward to ignite a platinum wire of some 12" in length, or to perform other... Page 1031 - ... that not only is Prout's law not as yet absolutely overturned, but that a heavy and apparently increasing weight of probability in its favour, or in favour of some modification of it, exists, and demands consideration. Page 1067 - ... a resistance of .4014 SU* The four electro-magnet coils connected seriatim are composed of copper wire of 5.5 mm diameter, presenting a total resistance of 0.3065 SU If (as has frequently been done) the wires of this machine were to be connected as suggested in Sir Charles Wheatstone's original paper, thus making the outer circuit not continuous .with but parallel to the coil circuit, and if the outer circuit had a resistance of one unit, it would follow that the total resistance to the current... Page 1068 - The two carbons, being pushed onward by gravity or spring power, are checked laterally by a pointed metallic abutment, situated at such a distance from the arc itself that the heat is only just sufficient to cause the gradual wasting away of the carbon in contact with atmospheric air. The carbon holders are connected with the iron core of a solenoid coil, of a resistance equal to about fifty times that of the arc, the ends of which coil are connected with the two electrodes respectively. The weight... Page 1068 - On examining the curves it will be remarked : 1. That the electro-motive force instead of diminishing with increased resistance, increases at first rapidly, then more slowly towards an asymptote. 2. That the current in the outer circuit is actually greater for a unit and a-half resistance than for one unit. Bibliographic information
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