I really can't say for ~sure~ that there aren't ~any~ preservatives in the milk today, but I'm fairly sure that there isn't. The main reason milk keeps so long today is because of fast, controlled refridgeration moments after it leaves the cow until it reaches your hands. It's cooled to under 4 degrees C within 1/2 hour of milking, stays that way until it's pasturized when any bacteria are killed, then it's quickly chilled again. 40-50 years ago there was little or NO refridgeration... at least around here. Milk was shipped in cans here until 1971. They had water chillers for the cans... but there's only so much that was going to do. 4 deg C is considered a critical control point for milk in the HAACP protocols that are followed today in the plants and on farm. Basically... if milk is kept cooler than 4 deg C, then bacterial growth is basically inhibited. That and fairly strict control of somatic cell counts (mastitis) give milk a long shelf life.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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