One hundred patients were questioned after metrizamide myelography about the side effects of the examination. The number and type of side effects were tabulated and correlated with investigated region (e.g., cervical , lumbar) and with use of medication (e.g., analgesics, diuretics). The number of side effects, particularly neuropsychologic, were higher than previously reported. The most common side effects were minor meningeal irritations (headache, nausea, dizziness, and vomiting) and were regarded by the patients as inconsequential. All side effects became apparent during the first 24 hr after myelography and all were transitory. The side effects, being minor, should not limit the use of metrizamide for myelography. However, those caring for patients who have undergone the study should be aware of the possible side effects.

The solar Hf abundance is determined using nine Hf II lines in the photospheric spectrum. The transition probabilities were obtained from lifetime measurements performed by the beam-foil technique. The abundance derived from synthetic spectrum calculations is A(Hf)= 0.884-0.08 in the logarithmic A(H) = 12.00 scale.

No abstract

Some energy levels of Sr 87 shows hyperfine splitting which broadens strontium lines in the solar spectrum. By analysis of two faint photospheric Sr i lines of Multiplet No. 3 an upper limit of the relative Sr 87 content (Sr 87/Sr) of -} has been found. The terrestrial value is 0.07-0.075.The solar abundance of strontium found from the two lines is log esr = 2.90 in the log e~ = 12.00 scale. Using the solar rubidium abundance recently determined by the author (Hauge, 1972), one obtains e~b/esr = o.5 • This value is larger than found even in chondrites showing high rubidium content.

16 lines of Pr II possibly present in the solar photospheric spectrum have been studied. When including hyperfine structure in synthetic calculations, investigations of 9 lines result in an abundance Avr = 0.71 • in the log AH = 12.00 scale.