spectro-comb. form

1885 tr. Behrens' Micros. in Bot. V. 139 The spectro-microscopical apparatus..has become an important instrument in the investigation of the coloring matter of plants.

1881 Nature 31 Mar. 524/1 The spectropyrometer is proved practically useful.

1880 Athenæum 25 Sept. 405/1 A spectro~telescope,..the purpose of which is to enable the observer to survey large portions of the sun's disc at once in homogeneous light.

1905 Astrophysical Jrnl. 21 354 Spectroheliograms were obtained showing detail in the centre of the disk.

1924 Glasgow Herald 13 June 5 Solar cyclonic motions have in recent years been clearly demonstrated by spectroheliograms obtained at the Mount Wilson Observatory.

1929 G. E. Hale in Encycl. Brit. XXI. 179/2 The long dark flocculi..shown on hydrogen spectroheliograms.

1932 G. E. Hale Signals from Stars 56 Objects familiar for years on hydrogen spectroheliograms.

1968 New Scientist 11 Jan. 97/1 (caption) X-ray spectro~heliograms of solar plages obtained with OSO-4.

1973 Sci. Amer. Oct. 73/1 The spectroheliograms were made by holding the diffraction grating at one angle, so that only a single wavelength fell on the photomultiplier. The solar image was then scanned in a raster pattern to build up a picture of the sun in that one wavelength.

1892 Athenæum 16 July 102/1 An instrument called the spectroheliograph.., by means of which..photographs are now made of all the prominences visible round the entire circumference of the sun with a single exposure.

1903 G. E. Hale in Publ. Yerkes Observ. III. i. 5 I now propose the name flocculi for the regions on the Sun's disk which are shown only on photographs made with the spectroheliograph.

1907 Athenæum 6 Apr. 415/3 Dr. Lockyer showed spectroheliographs of the sun.

1915 G. E. Hale Ten Years Wk. Mount. Observ. 20 The spectroheliograph..discloses extensive clouds of calcium, hydrogen, iron, and other vapors, which..are recorded (as flocculi).

1965 P. Wylie They both were Naked iv. 152 Big gadgets—telescopes, spectroheliographs, particle accelerators and the like.

1905 Athenæum 29 Apr. 535/2 Spectroheliographic Results explained by Anomalous Dispersion.

1905 Astrophysical Jrnl. 21 279 Our new explanation of the spectroheliographic results will be founded on the hypothesis that the sun is an unlimited mass of gas in which convection currents..are continually forming.

1973 Sci. Amer. Oct. 76/2 The major experiments of Skylab include a spectroheliometer from the Harvard College Observatory that is mapping the sun at wavelengths of from 300 to 1,350 angstroms with a resolution of five seconds of arc.

1976 New Yorker 6 Sept. 40 The spectroheliometer showed that they extended up from the chromosphere..into the transition region between the chromosphere and the corona.

1906 Astrophysical Jrnl. 24 42 This instrument..constitutes a spectrohelioscope, and was intended for the visual study of prominences.

1929 G. E. Hale in Encycl. Brit. XXI. 179/2 The spectrohelioscope renders visible to the eye many of the phenomena of the solar atmosphere photographed with the spectroheliograph and also permits their velocities in the line of sight to be measured.

1932 G. E. Hale Signals from Stars 48 The first spectrohelioscope (as I have named the instrument).

1955 Sci. Amer. Sept. 194/2 In 1890 George Ellery Hale and Henri Deslandres independently invented the spectrohelioscope. This instrument utilized the red light of hydrogen to produce an image of the entire disk of the sun.

1881 A. G. Bell Sound by Radiant Energy 41 These substances are put in communication with the ear by means of a hearing-tube, and thus the instrument is converted into a veritable spectro~phone.

1948 Chem. Abstr. 42 1467 An app. was constructed for the detn. of gases absorbing in either the infrared or the visible region, on the principle of Bell's spectrophone.

1965 New Scientist 21 Oct. 199/3 The collisional phenomenon has recently been investigated..using a device named the ‘spectrophone’, in which a sample of gas is subjected to a sequence of pulses of infrared (140 a second) during which the molecules acquire vibrational energy. If they lose that energy by collision, the increase in molecular velocities, and therefore in pressure, is detected by a microphone in the gas, which accordingly registers a 140 c/s note.

1881 A. G. Bell Sound by Radiant Energy 41 Suppose we smoke the interior of our spectrophonic receiver.

1961 Nature 8 Apr. 166/1 The measurements with our spectrophosphorimeter set an upper limit to the lifetime of the pyrene dimer.

1978 Nature 19 Jan. 236/1 The weak after~glow spectrum is also shown in Fig. 1a, at a gain factor of 20 for 100% solid crystalline carbazole at an identical setting of the spectrophosphorimeter.

1968 M. Zander Phosphorimetry iii. 136 The quantitative spectrophosphorimetric analysis of mixtures.

1968 M. Zander Phosphorimetry iii. 138 The qualitative and quantitative analysis of a mixture is possible by spectrophosphorimetry.

1974 Nature 30 Aug. 763/1 Analysis of the fluorescent material (by chromatography on the adsorbent in situ by spectrofluorimetry in situ, and by the latter technique and by spectrophosphorimetry after solvent extraction from the adsorbent).

1956 Rev. Sci. Instruments XXVII. 664/2 Spectrophotofluorometer. Continuous activation of compounds and measurement of the resulting fluorescence throughout the visible and ultraviolet regions is provided by this instrument.

1974 Nature 1 Feb. 291/1 The continuous formation of NADH:NADH was measured fluorometrically at 37°C with an Aminco Bowman spectrophotofluorometer using an excitation wavelength of 340 nm and an emission wavelength of 460 nm.

1964 Jrnl. Exper. Med. 120 509 The spectrophotofluorometric technique of Shore et al…was used with slight alterations.

1975 Nature 17 Apr. 636/1 Cells were centrifuged and the histamine released into the supernatant..was determined spectrophotofluorometrically.

1926 Sci. Abstr. A. 29 310 (heading) A spectro-polarimeter for the ultra-violet.

1971 Nature 16 July 192/1 Circular dichroism was measured at 25°C with a JASCO ORD/UV-5 spectropolarimeter equipped with a CD attachment.

1960 C. Djerassi Optical Rotatory Dispersion iii. 28 These refractive index gradients..account for the ‘blanking-out’ phenomenon noted in the spectropolarimetric examination of ketal formation.

1960 C. Djerassi Optical Rotatory Dispersion iii. 18 The single most important factor responsible for the renewed interest in rotatory dispersion has been recent advances in ultraviolet spectropolarimetry.

1923 Jrnl. Optical Soc. Amer. 7 439 The essential parts of a spectroradiometer consist of (1) a suitable spectrometer for dispersing thermal radiation into a spectrum, and (2) suitable radiometric instruments for measuring the spectral radiation intensities.

1975 Nature 10 Apr. 512/2 Measurements of the spectral energy distributions..of natural radiation between 400 and 800 nm were made using a spectroradiometer.

1922 Jrnl. Optical Soc. Amer. 6 1021 The transmission screen method should prove useful in supplementing the spectroradiometric measurements..on fainter stars.

1951 Electronics Jan. 81/3 This is a spectroradiometric curve of a particular color, obtained by measuring..the number of watts radiated by the source at each wavelength.

1921 Jrnl. Optical Soc. Amer. 5 133 The fiducial line in this Bureau's spectroradiometry is the yellow helium line.

1945 R. A. Sawyer Exper. Spectrosc. xi. 277 The methods used in the investigation of the infrared radiation..are essentially the methods of spectroradiometry.

1974 Nature 16 Aug. 532/2 The A5A idiotype has been found to be associated with a particular antibody spectrotype.

1981 Exper. Parasitol. LII. 216/2 When a clone of S1 spectrotype was allowed to establish a relapsing infection on two separate occasions, two variants of different spectrotypes were produced.