By early 1986 there will be over 120 large optical telescopes in the world engaged in astronomical research with mirror or lens diameters of one meter (39-inches) and larger. This atlas gives information on these telescopes and shows their observatory sites on continent sized maps. Also shown are observatory locations considered suitable for the

Multifrequency observations are presented of three BL Lac objects, including the first UV measurements of 0912 + 297 and 1219 + 285. An eight day optical flare was measured from 0422 = 004 in which a doubling in visual flux density was noted; other sources displayed smaller daily fluctuations. The 5-15 GHz radio flux from these three objects

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Radial velocities of 14 H II regions were obtained using reticon spectroscopy at H-alpha for the barred spiral NGC 1566. The same spectra also yield N II/H and S II/H ratios, and give values of the electron densities in the range of 10/cu cm. Kinematic and dynamic arguments are used to show that nonradial gas velocities are present, especially

The faint nebulosity CM24=PP85 listed by Parsamian and Petrosian (1979) was observed at infrared (1-10 pm) and radio (6 cm and CO line) wavelengths in the vicinity of the CO "hot spot" reported by Torrelles et al. (1983). The radio continuum (6 cm) emission from a spherically symmetrical HIl region was detected with the Very Large Array. Its

The initial orientation of 74 active regions (ARs) as measured in high resolution pictures. As previous works by the author (Garcia de la Rosa, 1984) suggest a different behavior between large and small active regions, the sample has been divided into those two classes, whose dividing line is roughly set at 5 x 10 to the 21st Mx in the magnetic