Ivar Fredholms parents were Ludvig Oscar Fredholm and Catharina Paulina Stenberg Ludvig Fredholm was a merchant who made his fortune replacing gas lamps with electric lamps

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Ivar Fredholm's parents were Ludvig Oscar Fredholm and Catharina Paulina Stenberg. Ludvig Fredholm was a merchant who made his fortune replacing gas lamps with electric lamps.
Always consult a medical doctor or dermatologist

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Always consult a medical doctor or dermatologist.
The rhythm is created by a rotating plate with holes through which a number of small bulbs illuminates activates photoelectric cells These cells are part of the oscillator circuit of the tubes and thus determines the speed of the rhythm

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The rhythm is created by a rotating plate with holes through which a number of small bulbs illuminates (= activates) photo-electric cells. These cells are part of the oscillator circuit of the tubes - and thus determines the speed of the rhythm.