Journal of the Franklin Institute, Հատոր 188Franklin Institute, 1919 Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] |
From inside the book
Արդյունքներ 59–ի 1-ից 5-ը:
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... Circuits . " Phil . Mag . , Vol . 17 , p . 402 , Mar. , 1909 ; also Proc . Phys . Soc . , London , Vol . 21 , p . 561 , 1909 ; also The Electrician , Vol . 63 , p . 8 , April 16 , 1909 ; and Vol . 71 , pp . 687– 690 , Aug. 1 , 1913 ...
... Circuits . " Phil . Mag . , Vol . 17 , p . 402 , Mar. , 1909 ; also Proc . Phys . Soc . , London , Vol . 21 , p . 561 , 1909 ; also The Electrician , Vol . 63 , p . 8 , April 16 , 1909 ; and Vol . 71 , pp . 687– 690 , Aug. 1 , 1913 ...
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... circuit constant , while changing the resistance between the tapping points . The unknown p.d. is connected to the terminals pp ' . The vibration galvanometer , by means of which a balance is secured between the adjusted and unknown ...
... circuit constant , while changing the resistance between the tapping points . The unknown p.d. is connected to the terminals pp ' . The vibration galvanometer , by means of which a balance is secured between the adjusted and unknown ...
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... circuit W. values only are required , and thus it is the ratio of two measured voltages which is of immediate importance . Such ratios can be determined by the relative method , without the necessity of measuring the potentiometer ...
... circuit W. values only are required , and thus it is the ratio of two measured voltages which is of immediate importance . Such ratios can be determined by the relative method , without the necessity of measuring the potentiometer ...
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... circuits ; namely ( 1 ) the potentiometer circuit P , and ( 2 ) the tested or working circuit W. The P circuit contains the tuning condenser C ' , and the adjustable resistor R ' , as well as the potentiometer abc . The W circuit may ...
... circuits ; namely ( 1 ) the potentiometer circuit P , and ( 2 ) the tested or working circuit W. The P circuit contains the tuning condenser C ' , and the adjustable resistor R ' , as well as the potentiometer abc . The W circuit may ...
Էջ 12
... circuits ; then any variation of current in the primary coil , due to unsteadi- ness in the oscillator , will not affect the vector ratios of equation ( 5 ) , and will therefore not affect formula ( 3 ) . If , however , the frequency ...
... circuits ; then any variation of current in the primary coil , due to unsteadi- ness in the oscillator , will not affect the vector ratios of equation ( 5 ) , and will therefore not affect formula ( 3 ) . If , however , the frequency ...
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airplane angle antenna effect apparatus beams black body brightness Bulletin Bureau capsaicin carbon Catalogue cent centimetre circuit coil color difference condenser constant cooling determined direction displacement current distance effluent electric electrodes electrolytic Engineering equation feet field Franklin Institute galvanometer given gives glass heat Hence horizontal illumination inches increase inductance industry instrument iron laboratory lamp length light lime loop luminous efficiency luminous efficiency curve luminous flux machined Manufacturing Company maximum measured ment metal method molybdenite number of turns observed obtained pendulum Pennsylvania photometric pitch pockets plane plant potentiometer practical produced radiation radius of gyration rays reception factor reflection resistance saturation sewage shield shown in Fig Signal softening treatment solenoid solution spacing standard steel strength surface temperature tion transmission tube United visibility voltage wave wave-length winding wire wood York City
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Էջ 489 - It is impossible for a self-acting machine, unaided by any external agency, to convey heat from one body to another at a higher temperature ; or heat cannot of itself (that is, without compensation) pass from a colder to a warmer body.
Էջ 788 - Hence the surface was early frozen. Hence the first snows remained on it unmelted, and received continual additions. Hence perhaps the winter of 1783-4, was more severe than any that had happened for many years.
Էջ 805 - ... the dustiness of the earth's atmosphere, but also upon the dustiness, and, of course, the temperature, of the solar atmosphere. Obviously, dust in the sun's envelope must, more or less, shut in solar radiation just as, and in the same manner that, dust in the earth's 1C.
Էջ 464 - SABCE be the path of a ray in this plane, entering the drop at A and emerging at C. The changes in direction at A and C are each i — r, in which i is the angle of incidence and r the angle of refraction, and the change at B, as also at every other place of an internal reflection, when there are more than one, is «• — 2r.
Էջ 788 - ... summer fogs. Because, if found to be so, men might from such fogs conjecture the probability of a succeeding hard winter, and of the damage to be expected by the breaking up of frozen rivers in the spring; and take such measures as are possible and practicable to secure themselves and effects from the mischiefs that attend the...
Էջ 690 - However, it appears that the temperature at which Illinois coal should be handled for the production of the best coke is somewhat lower than the best operating temperatures for Eastern coals, and moreover, the speed of coking of the Illinois coal is somewhat less.
Էջ 366 - The coefficient of reflection or total reflecting power of a surface is defined as the ratio of the total reflected luminous flux to the total incident luminous flux. In most practical work this value is not of great importance, the value desired being that of the reflecting power of the surface measured under certain specified conditions, such as the angle of incidence of the flux and the position from which the surface is viewed. The term '* reflection factor...
Էջ 289 - OF THE FRANKLIN INSTITUTE OF THE STATE OF PENNSYLVANIA. FOR THE PROMOTION OF THE MECHANIC ARTS. VOL.