78 minus 33 equals 45. Nope. Again, let’s look at some math and geometry. In this case, we also have to concern ourselves with the curvature of the grooves on a record. As the stylus gets closer ...

Let me stop you if you deduced that 78 minus 33 equals 45. That has nothing to do with anything. We have to look at geometry again and the curvature of the grooves of a record. As the stylus gets ...

For the Baby Boomers who remember record sizes of 33, 45 and 78 and names of retailers such as Sam Goody, Tower Records, HMV and Coconuts, this summer will be momentous: It marks the end of the ...