Abstract

<p>On account of the relatively small amount of energy emitted from sources in the wave-length region beyond 15µ, stray energy of short wave-length from the source becomes a considerable proportion of the energy indicated by the detecting system. By use of a reflection filter of LiF, this stray radiation is greatly reduced.</p><p>The infra-red spectra of cyclopentane, methylcyclopentane, ethylcyclopentane, and isopropylcyclopentane have been measured and each has a characteristic spectrum, which can be used in analysis.</p><p>Also, the spectra of cyclohexane, methylcyclohexane, ethylcyclohexane, and secondary butylcyclohexane have been measured and a number of bands which are characteristic of these substances have been observed.</p>

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  1. C. Schaefer and F. Matossi, Das Ultrarote Spectrum (Julius Springer Verlag, Berlin, 1930).
  2. A. Borden and E. F. Barker, J. Chem. Phys. 6, 61 (1938).
  3. Sir Arthur Schuster, Astrophys. J. 21, 197 (1921).
  4. Earle K. Plyler, Ralph Stair, and Curtis J. Humphreys, J. Research Nat. Bur. Stand. 38, 211 (1947).

Barker, E. F.

A. Borden and E. F. Barker, J. Chem. Phys. 6, 61 (1938).

Borden, A.

A. Borden and E. F. Barker, J. Chem. Phys. 6, 61 (1938).

Humphreys, Curtis J.

Earle K. Plyler, Ralph Stair, and Curtis J. Humphreys, J. Research Nat. Bur. Stand. 38, 211 (1947).

Matossi, F.

C. Schaefer and F. Matossi, Das Ultrarote Spectrum (Julius Springer Verlag, Berlin, 1930).

Plyler, Earle K.

Earle K. Plyler, Ralph Stair, and Curtis J. Humphreys, J. Research Nat. Bur. Stand. 38, 211 (1947).

Schaefer, C.

C. Schaefer and F. Matossi, Das Ultrarote Spectrum (Julius Springer Verlag, Berlin, 1930).

Schuster, Arthur

Sir Arthur Schuster, Astrophys. J. 21, 197 (1921).

Stair, Ralph

Earle K. Plyler, Ralph Stair, and Curtis J. Humphreys, J. Research Nat. Bur. Stand. 38, 211 (1947).

Other (4)

C. Schaefer and F. Matossi, Das Ultrarote Spectrum (Julius Springer Verlag, Berlin, 1930).

A. Borden and E. F. Barker, J. Chem. Phys. 6, 61 (1938).

Sir Arthur Schuster, Astrophys. J. 21, 197 (1921).

Earle K. Plyler, Ralph Stair, and Curtis J. Humphreys, J. Research Nat. Bur. Stand. 38, 211 (1947).

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