1836 The siege of the Alamo began. Attribution: On This Day.
1847 U.S. troops under Gen. Zachary Taylor defeated Mexican general Santa Anna at the Battle of Buena Vista in Mexico.
1905 A creamery in Cheyenne began selling pasteurized milk.
The benefits of pasteurization, and the feature of a local creamery, are things that are almost wholly forgotten today. Today, most milk is transported quite some distance before it is sold in a local store, but as recently as the 1950s, most significantly sized towns in Wyoming had a creamery, that being a local business that bought raw milk, pasteurized it, and sold it. Here's an example of such a (former) facility in Casper.
Pasteurization, a process by which a liquid is heated and then rapidly cooled, was a major innovation in food safety, and is commonly used today for most dairy products and some beer. The ability of a local facility to sell pasteurized milk was no doubt a major boon for local consumers in Cheyenne. Now, however, there's a movement to sell certain products directly from farms and outside the food safety system. Raw milk isn't something that a person usually encounters in Wyoming (unless a person lives on a farm or ranch that actually has a dairy cow, which few do) but it's a growing movement nationwide. Not too surprisingly, there have been some health issues associated with it.
1917 The National Vocational Act (Smith Hughes Act) signed into law.
February 23, 1921. Ridiculing customs.
We always reform or ridicule, not the customs of the remote past, but the new customs of the day before yesterday, which are just beginning to grow old. This is true of furniture and parents.
G.K. Chesterton, Chicago Tribune, February 23, 1921.
The United States Postal Service completed a pioneering air mail run in which Jack Knight, taking off on the prior day from San Francisco, landed at Cheyenne, Wyoming, and then took off and flew through the night to Chicago. Ernest M. Allison ten took over and lasted at 4:50 p.m. at Roosevelt Field at Long Island, New York.
The flight demonstrated that air mail was feasible.
While successful, it was also conducted under extreme odds, involving arctic conditions and nighttime fires to light the way. Knight was justifiably regarded as a hero during his lifetime.
1941 Blizzard conditions stalled traffic in the state. This was, of course, in the pre 4x4 days. Prior to World War Two 4x4 vehicles were almost unheard of and were limited to industrial vehicles. Almost every vehicle was a rear wheel drive 2x4.
1948 An earthquake in Yellowstone was felt regionally.
1950 A special session of the legislature called to deal with the problem of grasshopper infestation concluded.
1969 Gov. Hathaway signed into law a State severance tax bill. The bill had been extremely controversial, with there being strong arguments by the opposition that passing it would cause Wyoming's extractive industries to greatly reduce their activity. The arguments failed to stop the bill, and the severance tax did not greatly impact the extractive industries. Today, Wyoming's is nearly entirely funded by severance taxes.
1985 The Bison adopted as the state mammal.
1990 First Day of Issue Ceremony for the stamp based on Conrad Schwiering's painting High Mountain Meadows held in Cheyenne.