A method for the determination of the intensity of the solar light scattered by a unit volume of interplanetary space and thus the density and phase functions of interplanetary dust is presented. The method involves the calculation of the scattered light intensity as a function of sun-particle distance and elongation angle from a partly assumed

Procedures were developed for extracting low resolution spectra while correcting for halation effects and scattered light within the instrument. To correct for halation, the spectra were extracted from the line-by-line images. Perpendicular scans of the image were fitted using an iterative least squares procedure with a known form function. The

Observations are reported of the J = 2 → 1 transitions of CO and 12C18O at 230 and 219 GHz respectively from a number of galactic sources. A map of the central 1/2° × 1/2° of the Orion A molecular cloud is presented. The spectra are interpreted to derive molecular densities and abundance ratios in the molecular clouds observed.

Spectrograms of the variable star 48 Librae, taken near the last expected minimum, have been examined for irregularities of the shell line profiles. The asymmetries and the core-intensity of the strong shell lines suggest some kind of instability in the shell close to 1964. The harmonic spectral analyses of the acceleration and the radial velocity

Near infrared photometry is presented for the close eclipsing binaries R CMa, TX UMa, delta Lib, TV Cas, and AR Lac. The data are used to place limits on mass transfer rates.

The paper confirms the report of Kulkarni et al. (1979) who discovered IR bursts from the X-ray rapid burster, MXB1730-335. Two bursts at 2.2 microns, each of energy about 10 to the 31 J, and a new feature, several bright, brief flashes (delta t is less than 2s) superimposed on the burst continuum were observed. The brevity, luminosity and inferred