Topic	Experiment	Principal Investigator	Objective	Remarks
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Stellar and galactic astronomy	S019-Ultraviolet stellar astronomy	K. S. Henize Northwestern University, Johnson Space Flight Center	Obtain stellar spectra down to 1400 Å	Also used in studies of Comet Kohoutek
	S020-Grazing- incidence camera	R. Tousey Naval Research Laboratory	Solar imaging in EUV-soft X-ray	Also yielded data used in contamination studies
	S150-Galactic X-ray mapping	William Kraushaar University of Wisconsin	Investigate origin of diffuse X-ray background	.
	S183-Ultraviolet panorama	Georges Courtes Laboratoire d'Astronomie Spatiale France	Measure ultraviolet brightness of star fields	Also used in studies of Comet Kohoutek
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Interplanetary dust	S073-Gegenschein- zodiacal light	J. L. Weinberg Dudley Observatory	Measure the brightness and polarization of the visible background of the sky	.
	S149-Micrometeoroid collection	L. C. Hemenway Dudley Observatory	Determine the mass distribution of micrometeoroids in near-Earth space	.
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Comet Kohoutek	S201-Far-ultraviolet electrographic camera	Thornton Page Naval Research Laboratory and Johnson Space Flight Center	Study halo of Comet Kohoutek in far ultraviolet	Also used for stellar and galactic astronomy
	S233-Photometric studies	C. A. Lundquist Marshall Space Flight Center	Deduce changes in comet's coma from a brightness history	.
	S052-White-light coronagraph	Robert MacQueen High Altitude Observatory Boulder, Colorado	Observe comet during perihelion passage	Solar instrument also used in studies of Comet Kohoutek
	S055-Ultraviolet scanning polychromator spectroheliometer	Edmond Reeves Harvard College Observatory	Detect hydrogen emissions in comet's coma in the 296- to 1350-Å spectral range	Solar instrument also used in studies of Comet Kohoutek and the Earth's atmosphere
	S082A-Extreme- ultraviolet spectrograph	Richard Tousey Naval Research Laboratory	Measure comet's spectral emission in the 970- to 3040-Å range	Solar instrument also used in studies of Comet Kohoutek and the Earth's atmosphere
	S082B-Extreme- ultraviolet spectroheliograph	Richard Tousey Naval Research Laboratory	Search for comet helium halo in 304- and 584-Å wavelengths	Solar instrument also used in studies of Comet Kohoutek
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Energetic Particles	S009-Nuclear emulsion	M. M. Shapiro Naval Research Laboratory	Study charge spectrum of primary cosmic rays with emphasis on heavy nuclei	.
	S228-Transuranic	P. B. Price University of California Berkeley	Determine relative abundance cosmic rays, of cosmic ray nuclei with atomic mass greater than 65	.
	S230-Magnetospheric particle composition	Don Lind Johnson Space Center   Johannes Geiss Physics Institute, University of Bern, Switzerland	Measure isotopic abundance of atomic species in magnetosphere	.
	ED-76-Neutron	Terry Quist San Antonio, Texas	Measure ambient neutron flux analysis in orbital workshop	.
	TV-108-Neutron	Gerald Fishman Marshall Space Flight Center	Measure neutron flux aboard environment Skylab	.
	Visual light-flash observations	R. A. Hoffman Johnson Space Center	Investigate frequency and character of visual light flashes in near-Earth orbit	.
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Earth's atmosphere	S063-Ultraviolet airglow horizon photography	Donald Packer Naval Research Laboratory	Photograph the twilight airglow and Earth's ozone layer simultaneously in the visible and ultraviolet wave-lengths	Also used in Comet Kohoutek investigations
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Orbital environment	D008-Radiation in space	A. D. Grimm J. F. Janni G. Ainsworth Johnson Space Center- Kirtland Air Force Base	Provide experimental correlation of radiation levels with theoretical data and identify radiation-induced biological effects on man	.
	D024-Thermal control	W. L. Lehn Wright Patterson Air Force Base	Determine effects of near-coatings Earth space environment on selected thermal control coatings	.
	T003-In-flight aerosol analysis	W. Z. Leavitt Department of Transportation	Measure and analyze aerosol particle concentration and size distribution inside Skylab	.
	T025-Coronagraph	M. Greenberg Dudley Observatory	Determine presence of contamination particulate matter surrounding measurements orbital workshop	Also used for study of particulate matter in the Earth's atmosphere
	T027-Contamination measurements	J. A. Muscari Martin Marietta Corp.	Determine change in properties of optical samples due to deposition of contaminants and measure sky brightness background due to solar illumination of contaminants	.

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