Why in the 1930s did American flour manufacturers sell flour in colorfully patterned sacks? Detailed answer

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Why in the 1930s did American flour manufacturers sell flour in colorfully patterned sacks? Detailed answer

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Why in the 1930s did American flour manufacturers sell flour in colorfully patterned sacks?

During the Great Depression, housewives in many American families had to make clothes from empty flour sacks. Flour manufacturers specifically produced patterned sacks to give themselves a competitive edge, and some of them even printed patterns in newspapers.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

What is the redshift of galaxies?

That the spectral lines of distant galaxies always appear redshifted was discovered by Milton Humason and Edwin Hubble in the first half of the 1920s. The observations that Hubble then made in 1928 were used by him to formulate the law that bears his name, which reflects the dependence of the speed of the removal of the galaxy on the distance to it.

The indicated redshift is interpreted as the Doppler effect caused by the expansion of the Universe, and this hypothesis has the most supporters.

However, a small group of scientists led by Helton Arp believes that the reason for this phenomenon is still not entirely clear. Their reasoning is based on observations of some distant binary objects that appear to be related but have quite different redshifts.

In nature, there is another type of redshift - the so-called gravitational redshift, which was foreseen by Albert Einstein in the general theory of relativity.

The gravitational redshift manifests itself, as usual, in the shift of the light spectrum towards the red part. But it occurs for a different reason: when light enters a very strong gravitational field, it loses energy, which leads to a decrease in the frequency of light waves and a change in color - reddening.

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