In 1976, Willis (63) suggested that the sensitization potential of PABA was minimal.

The mother, Ekaterina Pavlovna, who at one time had been handsome, but now, asthmatic, depressed, vague, and over-feeble for her years, tried to entertain me with conversation about painting. Having heard from her daughter that I might come to Shelkovka, she had hurriedly recalled two or three of my landscapes which she had seen in exhibitions in Moscow, and now asked what I meant to express by them.

The Gibbs phenomenon is characteristic of Fourier series at a discontinuity, its size being proportional to the magnitude of the discontinuity.

This magazine is really rare. Only 20 copies are believed to be in existence.