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

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

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

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.