Scientific Papers of the Bureau of Standards
Scientific Papers of the Bureau of Standards
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666; 1895.
*N. S. Kurnakow, Zs. f. Anorg. Chemie, 42, p. 184; 1904.
'^'C. L. A. Schmidt, Chem. Eng., «, p. 80; 1907.
2o8 Bulletin of the Bureau of Standards. I voi. s, No. t.
In practice it has been found difficult to realize conveniently a sufficiently steady motion of the plate in the Roberts-Austen system of recording, and attempts have been made to devise methods in which the photographic plate remains fixed in posi- tion. This has been successfully accomplished by Saladin, whose apparatus ...(Fig. 8, p. 215) has been modified by Wologdine" to give the temperature-time curve by removing the prism M and substituting for the second galvanometer G, a plane mirror turn- ing about an horizontal axis. This mirror may be controlled by an hydraulic system as in Roberts-Austen's apparatus, or by clockwork as in the model constructed by Pellin, of Paris. The deflection of the galvanometer G^ gives to the beam of light an horizontal motion over the plate proportional to the temperature, while the vertical motion of the beam of light is given by the mir- ror turning at a uniform rate, and is therefore approximately proportional to the time as registered on a flat plate.
What to read after Scientific Papers of the Bureau of Standards?
You can find similar books in the "Read Also" column, or choose other free books by United States National Bureau of Standards to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
666; 1895.
*N. S. Kurnakow, Zs. f. Anorg. Chemie, 42, p. 184; 1904.
'^'C. L. A. Schmidt, Chem. Eng., «, p. 80; 1907.
2o8 Bulletin of the Bureau of Standards. I voi. s, No. t.
In practice it has been found difficult to realize conveniently a sufficiently steady motion of the plate in the Roberts-Austen system of recording, and attempts have been made to devise methods in which the photographic plate remains fixed in posi- tion. This has been successfully accomplished by Saladin, whose apparatus ...(Fig. 8, p. 215) has been modified by Wologdine" to give the temperature-time curve by removing the prism M and substituting for the second galvanometer G, a plane mirror turn- ing about an horizontal axis. This mirror may be controlled by an hydraulic system as in Roberts-Austen's apparatus, or by clockwork as in the model constructed by Pellin, of Paris. The deflection of the galvanometer G^ gives to the beam of light an horizontal motion over the plate proportional to the temperature, while the vertical motion of the beam of light is given by the mir- ror turning at a uniform rate, and is therefore approximately proportional to the time as registered on a flat plate.
What to read after Scientific Papers of the Bureau of Standards?
You can find similar books in the "Read Also" column, or choose other free books by United States National Bureau of Standards to read onlineMoreLess
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